version update

Describes the estimate signature + TeX/PDF generation release impact:
signature pad on validation, role-aware accept/reject with signatures,
ProAccepted/ClientAccepted split, estimate.tex/estimate.pdf endpoints
in Yavsc.Api, vector TikZ signatures, PostIt PDF/TeX download buttons,
list refresh + title renames, the lualatex stdin runtime, and the
Emergency stop / log-write / RenderViewToString / Layout fixes.

Co-Authored-By: Claude Code <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,81 @@
 # Changelog
 
+## [1.0.8-rc16] - unstable
+
+Flux de signature et de génération de devis : un devis peut désormais être
+signé par les deux parties (fournisseur et client) puis téléchargé en PDF
+ou TeX depuis PostIt, avec les signatures dessinées en vecteur.
+
+### Added
+
+* [PostIt] Pad de signature sur la page de validation d'un devis : on valide
+  ou on refuse en joignant une signature (côté fournisseur ou client), capturée
+  au format filaire PostIt (strokes) et envoyée sur l'acceptation.
+* [Yavsc.Api] Finalisation de `POST /api/v1/front/query/accept` et `.../reject` :
+  autorisation selon le rôle (fournisseur/client/admin), signature optionnelle
+  persistée sur l'estimate avec horodatage `ProviderValidationDate` /
+  `ClientValidationDate` selon le côté signataire.
+* [Yavsc.Api] `QueryStatus.Accepted` éclaté en `ProAccepted` / `ClientAccepted`
+  pour distinguer l'acceptation de chaque partie.
+* [Yavsc.Api] Endpoints de devis `GET /api/v1/front/query/{id}/estimate.tex` et
+  `estimate.pdf` (clé par id de query). Le flux de génération TeX/PDF est
+  rapatrié de Yavsc.Org vers Yavsc.Api (`TeXHelpers`, `PdfGenerationViewModel`,
+  `BillViewComponent`, modèles Bill/Estimate, `_ViewImports` ; `Program.cs`
+  câble `AddControllersWithViews` + `SiteSettings`).
+* [Yavsc.Api] Signatures du devis dessinées en TikZ vectoriel
+  (`TeXHelpers.SignatureToTikz`) en bas du document, fournisseur et client
+  côte à côte dans deux minipages ; plus de dépendance à un PNG de signature.
+* [Yavsc.Api.Client] `DownloadAsync` sur le client + `GetEstimateTexAsync` /
+  `GetEstimatePdfAsync` ; boutons « Télécharger PDF » / « Télécharger TeX »
+  dans PostIt sur la page de validation du devis et le détail de commande,
+  avec un helper `StorageProvider` d'enregistrement de fichier.
+* [PostIt] La liste des devis se rafraîchit au retour de navigation (pop-back),
+  de sorte qu'un devis validé quitte immédiatement la liste du signataire.
+* [PostIt] Renommage des titres de liste : « Devis en attente de signature
+  fournisseur » / « Devis en attente de signature client ».
+* [Yavsc.Abstract] `SignatureType` déplacé dans `Yavsc.Abstract.Billing`.
+* [CLI] Option `-c configuration-file.json` au lancement.
+* [Tests] `EstimatePdfGenerationTests` : tests unitaires du pipeline
+  signature → TikZ → PDF (devis signé des deux côtés), assertant que le PDF
+  existe au chemin de sortie attendu et que seul le PDF persiste (aux/log
+  nettoyés) ; skip propre si `lualatex` est absent.
+* [README] Dépendances système au runtime pour la génération PDF :
+  `texlive-binaries` (lualatex), `texlive-luatex` (luaotfload),
+  `texlive-pictures` (tikz), `texlive-fonts-extra` (bera).
+
+### Changed
+
+* [Yavsc.Api] `GetOngoingEstimatesAsProvider` filtre désormais sur
+  `ProviderValidationDate` : un devis signé par le fournisseur quitte sa liste
+  « en attente ».
+* [Yavsc.Api] La génération PDF compile via le `lualatex` système, le TeX fourni
+  sur l'entrée standard (`/dev/stdin`), le PDF écrit directement dans le
+  répertoire des factures (`Site.Bills`), les artefacts `.aux`/`.log` nettoyés
+  afin que seul le `.pdf` persiste.
+
+### Fixed
+
+* [Yavsc.Api] `Emergency stop` à la génération PDF : `lualatex` sans argument
+  fichier lit stdin en mode terminal et s'arrête après la première ligne d'un
+  document multi-lignes. Corrigé en passant `/dev/stdin` comme nom de fichier
+  d'entrée — stdin est alors traité comme un fichier régulier et le document
+  multi-lignes compile. C'était la cause racine de l'échec en production, pas
+  `bera` ni `luaotfload` (problèmes réels mais séparés, comblés côté paquets).
+* [Yavsc.Api] `I can't write on file 'estimate-1.log'` : le chemin relatif
+  `Site.Bills` (`"bills"`) était imbriqué quand il servait à la fois de
+  `-output-directory` et de répertoire de travail ; résolu en chemin absolu.
+* [Yavsc.Api] NRE dans `RenderViewToString` (RouteData / `ViewData.Model`
+  nuls) : reconstruit sur le `ControllerContext` du contrôleur ; `IViewEngine`
+  résolu via `IRazorViewEngine` (.NET 10 n'enregistre pas de `IViewEngine`
+  unique).
+* [Yavsc.Api] `Layout = "null"` (chaîne) dans les modèles TeX cherchait
+  `null.cshtml` ; corrigé en `Layout = null` (null C#).
+* [Yavsc.Api] `texi2pdf` (outil Texinfo, inadapté au LaTeX) remplacé par
+  `lualatex`.
+* [Yavsc.Api] Les diagnostics lualatex étaient perdus (écrits dans le `.log`
+  qu'on supprimait) ; stdout/stderr sont désormais capturés dans le message
+  d'erreur, et le `.log` est conservé en cas d'échec.
+
 ## [1.0.8-rc15] - unstable
 
 ### Added
@@ -369,6 +445,8 @@ the ACL now comes along with the article,
   the same user-visible switch without a schema change.
 
 [Unreleased]: https://forgejo.pschneider.fr/notazof/yavsc/compare/HEAD
+[1.0.8-rc16]: https://forgejo.pschneider.fr/notazof/yavsc/compare/1.0.8-rc15...1.0.8-rc16
+[1.0.8-rc15]: https://forgejo.pschneider.fr/notazof/yavsc/compare/1.0.8-rc14...1.0.8-rc15
 [1.0.8-rc1]: https://forgejo.pschneider.fr/notazof/yavsc/compare/1.0.7...1.0.8-rc1
 [1.0.7]: https://forgejo.pschneider.fr/notazof/yavsc/compare/1.0.6...1.0.7
 [1.0.6]: https://forgejo.pschneider.fr/notazof/yavsc/compare/1.0.5...1.0.6

README.md

@@ -61,6 +61,37 @@ make test
 
 ### les services et l'API
 
+#### Dépendances système au runtime
+
+La génération des devis et factures en PDF (`/api/v1/front/query/{id}/estimate.pdf`,
+`BillingController` → `BillViewComponent`) compile un source LaTeX via la commande
+système `lualatex` : le TeX est fourni sur l'entrée standard et le PDF est écrit
+directement dans le répertoire des factures (`Site.Bills`). `lualatex` doit donc
+être installé et opérationnel sur l'hôte qui exécute l'API — typiquement le service
+systemd `yavscApi`.
+
+Sous Debian/Ubuntu :
+
+```bash
+sudo apt install texlive-binaries texlive-luatex texlive-pictures texlive-fonts-extra
+```
+
+- `texlive-binaries` fournit l'exécutable `lualatex` (collection basic).
+- `texlive-luatex` fournit les paquets de support chargés au démarrage de lualatex,
+  notamment `luaotfload`. Sans lui, lualatex démarre mais s'arrête sur
+  `module 'luaotfload-main' not found … Emergency stop` et ne produit aucun PDF.
+  (Sur les Debian récents, `luaotfload` a migré de `texlive-latex-extra` vers
+  `texlive-luatex` — avoir `texlive-latex-extra` seul ne suffit plus.)
+- `texlive-pictures` fournit `tikz`/`pgf`, utilisé pour dessiner les signatures
+  du client et du fournisseur en bas du devis (vecteur, pas de PNG).
+- `texlive-fonts-extra` fournit la fonte `bera` chargée par le modèle de devis.
+  Sans elle, lualatex s'arrête sur `! LaTeX Error: File 'bera.sty' not found`
+  (`Emergency stop`, aucun PDF).
+
+Sur un hôte sans `lualatex`, les endpoints PDF renvoient une erreur 500 « PDF
+generation failed » ; l'endpoint TeX (`estimate.tex`) reste utilisable et permet
+de compiler le document hors-ligne.
+
 ### La Prod
 
 `cd srv/Yavsc/contrib` : `make reinstall CONFIGURATION=Release APP_INSTALL_ENV=production`.

src/PostIt/Directory.Packages.props

@@ -22,6 +22,7 @@
     <PackageVersion Include="Material.Avalonia" Version="3.20.0" />
     <PackageVersion Include="AvaloniaUI.DiagnosticsSupport" Version="2.2.3" />
     <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.4.2" />
+    <PackageVersion Include="Mono.Options" Version="6.12.0.148" />
     <PackageVersion Include="Xamarin.AndroidX.Browser" Version="1.10.0.1" />
     <PackageVersion Include="Xamarin.AndroidX.Core.SplashScreen" Version="1.2.0.3" />
     <PackageVersion Include="Xamarin.AndroidX.Lifecycle.Runtime" Version="2.11.0.1" />
@@ -30,4 +31,4 @@
     <PackageVersion Include="Xamarin.UITest" Version="4.4.2" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="10.0.12" />
   </ItemGroup>
-</Project>
+</Project>

src/PostIt/PostIt.Android/PostIt.Android.csproj

@@ -11,8 +11,8 @@
     <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <AndroidResource Include="Icon.png">

src/PostIt/PostIt.Browser/PostIt.Browser.csproj

@@ -6,8 +6,8 @@
     <Nullable>enable</Nullable>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Avalonia.Browser" />

src/PostIt/PostIt.Desktop/PostIt.Desktop.csproj

@@ -7,8 +7,8 @@
     <Nullable>enable</Nullable>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <PropertyGroup>
     <ApplicationManifest>app.manifest</ApplicationManifest>

src/PostIt/PostIt.Desktop/Program.cs

@@ -12,6 +12,8 @@ sealed class Program
     [STAThread]
     public static void Main(string[] args)
     {
+        CLIOptionHandler.HandleArgs(args);
+
         // Short-circuit 2nd-instance launches (OS handing us the
         // postit://callback URL) BEFORE Avalonia spins up a window.
         // If we let Avalonia initialise, the new MainWindow flashes

src/PostIt/PostIt.Tests/EstimateListPageViewModelTests.cs

@@ -11,12 +11,13 @@ public class EstimateListPageViewModelTests
     {
         var api = new StubEstimateListApi();
         var client = new EstimateApiClient(api, "https://business.example/api/v1/");
-        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Client);
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Client, front);
 
         await vm.InitializeAsync();
 
         Assert.Contains("https://business.example/api/v1/estimate/asclient", api.Paths);
-        Assert.Equal("Mes devis à valider", vm.Title);
+        Assert.Equal("Devis en attente de signature client", vm.Title);
         Assert.Equal(2, vm.Estimates.Count);
         // Most recent first
         Assert.Equal(2, vm.Estimates[0].Id);
@@ -28,12 +29,13 @@ public class EstimateListPageViewModelTests
     {
         var api = new StubEstimateListApi();
         var client = new EstimateApiClient(api, "https://business.example/api/v1/");
-        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Provider);
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Provider, front);
 
         await vm.InitializeAsync();
 
         Assert.Contains("https://business.example/api/v1/estimate/asprovider", api.Paths);
-        Assert.Equal("Mes devis en attente", vm.Title);
+        Assert.Equal("Devis en attente de signature fournisseur", vm.Title);
         Assert.Equal(2, vm.Estimates.Count);
     }
 
@@ -42,7 +44,8 @@ public class EstimateListPageViewModelTests
     {
         var api = new StubEstimateListApi();
         var client = new EstimateApiClient(api, "https://business.example/api/v1/");
-        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Provider);
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Provider, front);
 
         await vm.InitializeAsync();
 
@@ -63,7 +66,8 @@ public class EstimateListPageViewModelTests
     {
         var api = new StubEstimateListApi { Empty = true };
         var client = new EstimateApiClient(api, "https://business.example/api/v1/");
-        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Client);
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateListPageViewModel(client, EstimateListPerspective.Client, front);
 
         await vm.InitializeAsync();
 

src/PostIt/PostIt.Tests/EstimateValidationPageViewModelTests.cs

@@ -0,0 +1,255 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using PostIt.Controls;
+using PostIt.ViewModels;
+using Yavsc.Api.Client;
+using Yavsc.Models.Billing;
+
+namespace PostIt.Tests;
+
+/// <summary>
+/// Verifies <see cref="EstimateValidationPageViewModel"/> wires the two
+/// signature pads (provider + client) into the right
+/// <see cref="FrontOfficeApiClient"/> call. The view (XAML, rendering)
+/// is not tested here; the VM is driven through the same
+/// <see cref="SignaturePadControl"/> test hooks the signature tests use,
+/// and the API client through a recording fake
+/// <see cref="IYavscApiClient"/>. The test host's
+/// <c>TestApp</c> makes <c>GoBackAsync</c> a no-op, so the success paths
+/// run to completion without navigation side effects.
+/// </summary>
+public class EstimateValidationPageViewModelTests
+{
+    private static EstimateDto SampleEstimate(long? commandId = 42) => new()
+    {
+        Id = 7,
+        CommandId = commandId,
+        CommandType = "Rdv",
+        Title = "Devis plomberie",
+        Description = "Réparation",
+        ClientId = "bob",
+        OwnerId = "alice",
+    };
+
+    private static void DrawOneStroke(SignaturePadControl pad)
+    {
+        pad.AppendPointForTest(100, 200);
+        pad.AppendPointForTest(300, 400);
+        pad.SealStrokeForTest();
+    }
+
+    [Fact]
+    public async Task Validate_calls_accept_with_strokes_and_command_id()
+    {
+        var api = new RecordingApi();
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Provider, front);
+
+        var proPad = new SignaturePadControl();
+        var clientPad = new SignaturePadControl();
+        vm.Attach(proPad, clientPad);
+        DrawOneStroke(proPad); // provider signs on their writable pad
+
+        await vm.ValidateAsync();
+
+        Assert.Equal(HttpMethod.Post, api.LastMethod);
+        Assert.Contains("front/query/accept", api.LastPath);
+        Assert.Contains("billingCode=Rdv", api.LastPath);
+        Assert.Contains("queryId=42", api.LastPath);
+        var body = Assert.IsType<QueryAcceptanceRequestDto>(api.LastBody);
+        Assert.NotNull(body.Strokes);
+        Assert.NotEmpty(body.Strokes);
+        Assert.Equal(10_000, body.CoordinateMax);
+        // The provider perspective declares the Pro side, so the
+        // server stores the signature under the provider's author
+        // regardless of role inference.
+        Assert.Equal(SignatureType.Pro, body.SignatureType);
+    }
+
+    [Fact]
+    public async Task Validate_from_client_perspective_declares_client_side()
+    {
+        var api = new RecordingApi();
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Client, front);
+
+        var cliPad = new SignaturePadControl();
+        vm.Attach(new SignaturePadControl(), cliPad);
+        DrawOneStroke(cliPad); // client signs on their writable pad
+
+        await vm.ValidateAsync();
+
+        var body = Assert.IsType<QueryAcceptanceRequestDto>(api.LastBody);
+        Assert.Equal(SignatureType.Client, body.SignatureType); // Client side
+    }
+
+    [Fact]
+    public async Task Reject_calls_reject_endpoint_with_no_body()
+    {
+        var api = new RecordingApi();
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Client, front);
+
+        vm.Attach(new SignaturePadControl(), new SignaturePadControl());
+
+        await vm.RejectAsync();
+
+        Assert.Equal(HttpMethod.Post, api.LastMethod);
+        Assert.Contains("front/query/reject", api.LastPath);
+        Assert.Contains("queryId=42", api.LastPath);
+        Assert.Null(api.LastBody);
+    }
+
+    [Fact]
+    public async Task Validate_without_signature_warns_and_does_not_call()
+    {
+        var api = new RecordingApi();
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Provider, front);
+
+        vm.Attach(new SignaturePadControl(), new SignaturePadControl()); // empty pads
+
+        await vm.ValidateAsync(); // no throw: returns before GoBack
+
+        Assert.Null(api.LastMethod);
+        Assert.Contains("signer", vm.StatusMessage, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void Validate_command_gates_on_signature_and_command()
+    {
+        var api = new RecordingApi();
+        var front = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+        var vm = new EstimateValidationPageViewModel(
+            SampleEstimate(commandId: null), EstimateListPerspective.Provider, front);
+
+        var proPad = new SignaturePadControl();
+        vm.Attach(proPad, new SignaturePadControl());
+
+        // No CommandId ⇒ cannot validate even after signing.
+        DrawOneStroke(proPad);
+        Assert.False(vm.ValidateCommand.CanExecute(null));
+
+        var vm2 = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Provider, front);
+        var proPad2 = new SignaturePadControl();
+        vm2.Attach(proPad2, new SignaturePadControl());
+        Assert.False(vm2.ValidateCommand.CanExecute(null)); // no signature yet
+        DrawOneStroke(proPad2);
+        Assert.True(vm2.ValidateCommand.CanExecute(null));
+    }
+
+    [Fact]
+    public void RoleLabel_reflects_perspective()
+    {
+        var front = new FrontOfficeApiClient(new RecordingApi(), "https://business.example/api/v1/");
+        var pro = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Provider, front);
+        var cli = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Client, front);
+
+        Assert.Contains("prestataire", pro.RoleLabel, StringComparison.OrdinalIgnoreCase);
+        Assert.Contains("client", cli.RoleLabel, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void Only_the_author_pad_is_writable()
+    {
+        var front = new FrontOfficeApiClient(new RecordingApi(), "https://business.example/api/v1/");
+
+        var proVm = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Provider, front);
+        var proPad = new SignaturePadControl();
+        var cliPad = new SignaturePadControl();
+        proVm.Attach(proPad, cliPad);
+        Assert.False(proPad.IsReadOnly);  // provider writes the Pro pad
+        Assert.True(cliPad.IsReadOnly);
+
+        var cliVm = new EstimateValidationPageViewModel(
+            SampleEstimate(), EstimateListPerspective.Client, front);
+        var proPad2 = new SignaturePadControl();
+        var cliPad2 = new SignaturePadControl();
+        cliVm.Attach(proPad2, cliPad2);
+        Assert.True(proPad2.IsReadOnly);
+        Assert.False(cliPad2.IsReadOnly); // client writes the Client pad
+    }
+
+    [Fact]
+    public void Load_existing_signatures_renders_both_sides_in_their_pads()
+    {
+        var proStrokes = new[] { 1, 1000, 1000 };
+        var cliStrokes = new[] { 1, 9000, 9000 };
+        var front = new FrontOfficeApiClient(new RecordingApi(), "https://business.example/api/v1/");
+        var estimate = SampleEstimate();
+        estimate.SignaturePro = new EstimateSignatureDto { Strokes = proStrokes };
+        estimate.SignatureClient = new EstimateSignatureDto { Strokes = cliStrokes };
+
+        // Client perspective: both pads show the stored signatures, but
+        // only the client pad is writable.
+        var vm = new EstimateValidationPageViewModel(estimate, EstimateListPerspective.Client, front);
+        var proPad = new SignaturePadControl();
+        var cliPad = new SignaturePadControl();
+        vm.Attach(proPad, cliPad);
+
+        Assert.Equal(proStrokes, proPad.Snapshot().Strokes);
+        Assert.Equal(cliStrokes, cliPad.Snapshot().Strokes);
+        Assert.True(vm.HasProSignature);
+        Assert.True(vm.HasClientSignature);
+    }
+
+    [Fact]
+    public void Load_existing_pro_signature_renders_in_pro_pad_only()
+    {
+        var strokes = new[] { 1, 5000, 5000 };
+        var front = new FrontOfficeApiClient(new RecordingApi(), "https://business.example/api/v1/");
+        var estimate = SampleEstimate();
+        estimate.SignaturePro = new EstimateSignatureDto { Strokes = strokes, CoordinateMax = 10_000 };
+        var vm = new EstimateValidationPageViewModel(estimate, EstimateListPerspective.Provider, front);
+
+        var proPad = new SignaturePadControl();
+        var cliPad = new SignaturePadControl();
+        vm.Attach(proPad, cliPad);
+
+        Assert.Equal(strokes, proPad.Snapshot().Strokes);
+        Assert.True(cliPad.Snapshot().IsEmpty);
+        Assert.True(vm.HasProSignature);
+        Assert.False(vm.HasClientSignature);
+    }
+
+    private sealed class RecordingApi : IYavscApiClient
+    {
+        public HttpClient Http { get; } = new();
+        public HttpMethod? LastMethod { get; private set; }
+        public string? LastPath { get; private set; }
+        public object? LastBody { get; private set; }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastMethod = method;
+            LastPath = path;
+            LastBody = body;
+            return Task.FromResult(default(T)!);
+        }
+
+        public Task CallAsync(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastMethod = method;
+            LastPath = path;
+            LastBody = body;
+            return Task.CompletedTask;
+        }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
+        public ValueTask DisposeAsync() => ValueTask.CompletedTask;
+    }
+}

src/PostIt/PostIt.Tests/FrontOfficeApiClientTests.cs

@@ -0,0 +1,157 @@
+using System.Net.Http;
+using Yavsc.Api.Client;
+
+namespace PostIt.Tests;
+
+/// <summary>
+/// Verifies <see cref="FrontOfficeApiClient"/> issues the right
+/// <c>api/v1/front/query/accept</c> / <c>.../reject</c> requests with
+/// the PostIt signature payload, using a recording fake
+/// <see cref="IYavscApiClient"/> (no network).
+/// </summary>
+public class FrontOfficeApiClientTests
+{
+    private static QueryAcceptanceRequestDto SampleBody() => new()
+    {
+        Strokes = new[] { 2, 100, 200, 300, 400 },
+        CoordinateMax = 10_000,
+        CapturedAtUtc = new DateTime(2026, 9, 21, 12, 0, 0, DateTimeKind.Utc),
+    };
+
+    [Fact]
+    public async Task Accept_posts_to_accept_endpoint_with_signature_body()
+    {
+        var api = new RecordingApi();
+        var client = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+
+        var body = SampleBody();
+        await client.AcceptQueryAsync("Rdv", 42, body);
+
+        Assert.Equal(HttpMethod.Post, api.LastMethod);
+        Assert.Equal(
+            "https://business.example/api/v1/front/query/accept?billingCode=Rdv&queryId=42",
+            api.LastPath);
+        Assert.Same(body, api.LastBody);
+    }
+
+    [Fact]
+    public async Task Reject_posts_to_reject_endpoint_with_no_body()
+    {
+        var api = new RecordingApi();
+        var client = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+
+        await client.RejectQueryAsync("Rdv", 42);
+
+        Assert.Equal(HttpMethod.Post, api.LastMethod);
+        Assert.Equal(
+            "https://business.example/api/v1/front/query/reject?billingCode=Rdv&queryId=42",
+            api.LastPath);
+        Assert.Null(api.LastBody);
+    }
+
+    [Fact]
+    public async Task Accept_returns_deserialized_response()
+    {
+        var api = new RecordingApi
+        {
+            Response = new QueryAcceptanceResponseDto
+            {
+                QueryId = 42,
+                Status = "Accepted",
+                Signature = new QuerySignatureRefDto { Id = 9, EstimateId = 5, Type = "Pro" },
+            },
+        };
+        var client = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+
+        var response = await client.AcceptQueryAsync("Rdv", 42, SampleBody());
+
+        Assert.Equal(42, response.QueryId);
+        Assert.Equal("Accepted", response.Status);
+        Assert.NotNull(response.Signature);
+        Assert.Equal("Pro", response.Signature!.Type);
+    }
+
+    [Fact]
+    public async Task Accept_rejects_invalid_arguments()
+    {
+        var api = new RecordingApi();
+        var client = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+
+        await Assert.ThrowsAsync<ArgumentException>(() => client.AcceptQueryAsync("", 42, SampleBody()));
+        await Assert.ThrowsAsync<ArgumentOutOfRangeException>(() => client.AcceptQueryAsync("Rdv", 0, SampleBody()));
+        await Assert.ThrowsAsync<ArgumentNullException>(() => client.AcceptQueryAsync("Rdv", 42, null!));
+        await Assert.ThrowsAsync<ArgumentException>(() => client.RejectQueryAsync("", 42));
+        await Assert.ThrowsAsync<ArgumentOutOfRangeException>(() => client.RejectQueryAsync("Rdv", 0));
+    }
+
+    [Fact]
+    public async Task GetEstimatePdf_gets_estimate_pdf_endpoint()
+    {
+        var api = new RecordingApi();
+        var client = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+
+        await client.GetEstimatePdfAsync(42);
+
+        Assert.Equal(HttpMethod.Get, api.LastMethod);
+        Assert.Equal(
+            "https://business.example/api/v1/front/query/42/estimate.pdf",
+            api.LastPath);
+    }
+
+    [Fact]
+    public async Task GetEstimateTex_gets_estimate_tex_endpoint()
+    {
+        var api = new RecordingApi();
+        var client = new FrontOfficeApiClient(api, "https://business.example/api/v1/");
+
+        await client.GetEstimateTexAsync(42);
+
+        Assert.Equal(HttpMethod.Get, api.LastMethod);
+        Assert.Equal(
+            "https://business.example/api/v1/front/query/42/estimate.tex",
+            api.LastPath);
+    }
+
+    private sealed class RecordingApi : IYavscApiClient
+    {
+        public HttpClient Http { get; } = new();
+        public HttpMethod? LastMethod { get; private set; }
+        public string? LastPath { get; private set; }
+        public object? LastBody { get; private set; }
+        public QueryAcceptanceResponseDto? Response { get; set; }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastMethod = method;
+            LastPath = path;
+            LastBody = body;
+
+            var response = Response ?? new QueryAcceptanceResponseDto();
+            return Task.FromResult((T)(object)response);
+        }
+
+        public Task CallAsync(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastMethod = method;
+            LastPath = path;
+            LastBody = body;
+            return Task.CompletedTask;
+        }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
+        public Task<byte[]> DownloadAsync(HttpMethod method, string path, CancellationToken ct = default)
+        {
+            LastMethod = method;
+            LastPath = path;
+            LastBody = null;
+            return Task.FromResult(Array.Empty<byte>());
+        }
+
+        public ValueTask DisposeAsync() => ValueTask.CompletedTask;
+    }
+}

src/PostIt/PostIt.Tests/PostIt.Tests.csproj

@@ -8,8 +8,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
@@ -26,4 +26,4 @@
     <Using Include="Xunit" />
   </ItemGroup>
   <ItemGroup></ItemGroup>
-</Project>
+</Project>

src/PostIt/PostIt/App.axaml.cs

@@ -17,6 +17,7 @@ namespace PostIt;
 public partial class App : Application
 {
     private int _bootStarted;
+    public string? CliConfigFileSpecification {  get; private set; }
 
     /// <summary>
     /// DI container the platform entry points hand to ViewModels so
@@ -203,4 +204,9 @@ public partial class App : Application
     {
         await View!.NavRoot.PopAsync();
     }
+
+    internal void UseConfigFileWhenLoading(string configFile)
+    {
+        this.CliConfigFileSpecification = configFile;
+    }
 }

src/PostIt/PostIt/CLIOptions/CLIOptions.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using Mono.Options;
+using PostIt;
+using PostIt.ViewModels;
+
+public static class CLIOptionHandler
+{
+    public static void HandleArgs(string[] args)
+    {
+        bool showHelp = false;
+        string configFile = null;
+
+        var options = new OptionSet {
+            { "c|configuration=", "Configuration file to load", (string v) => configFile = v },
+            { "h|help", "Show this message and exit", v => showHelp = true }
+        };
+
+        List<string> extra = options.Parse(args);
+
+        if (showHelp)
+        {
+            Console.WriteLine("Usage: app [OPTIONS]+");
+            options.WriteOptionDescriptions(Console.Out);
+            return;
+        }
+        if (configFile != null)
+        {
+            var app = App.Current as App;
+            app.UseConfigFileWhenLoading(configFile);
+        }
+    }
+}

src/PostIt/PostIt/Controls/SignaturePadControl.cs

@@ -46,6 +46,21 @@ public class SignaturePadControl : TemplatedControl
         set => SetValue(CaptureAreaProperty, value);
     }
 
+    /// <summary>
+    /// When true the control ignores pointer input — it only displays
+    /// strokes loaded into its buffer (e.g. the other party's
+    /// signature, which must be shown but not editable). <see cref="Load"/>
+    /// and <see cref="Clear"/> still work.
+    /// </summary>
+    public static readonly StyledProperty<bool> IsReadOnlyProperty =
+        AvaloniaProperty.Register<SignaturePadControl, bool>(nameof(IsReadOnly));
+
+    public bool IsReadOnly
+    {
+        get => GetValue(IsReadOnlyProperty);
+        set => SetValue(IsReadOnlyProperty, value);
+    }
+
     /// <summary>
     /// Captured strokes in wire form. Exposed as a read-only view
     /// over the internal buffer. The buffer only mutates on the UI
@@ -109,6 +124,7 @@ public class SignaturePadControl : TemplatedControl
 
     private void OnCapturePressed(object? sender, PointerPressedEventArgs e)
     {
+        if (IsReadOnly) return;
         if (!e.GetCurrentPoint(CaptureArea).Properties.IsLeftButtonPressed) return;
         e.Pointer.Capture(CaptureArea);
         _capturing = true;
@@ -181,6 +197,38 @@ public class SignaturePadControl : TemplatedControl
         RedrawRequested?.Invoke(this, EventArgs.Empty);
     }
 
+    /// <summary>
+    /// Replace the buffer with the given wire-format strokes — e.g. a
+    /// signature loaded back from the server — and raise
+    /// <see cref="RedrawRequested"/> so the host view repaints the ink.
+    /// Loaded strokes are all sealed (there is no pending stroke).
+    /// Malformed input (a non-positive length prefix, or a stroke that
+    /// runs past the end of the array) is truncated at the offending
+    /// point so the buffer never holds an inconsistent state.
+    /// </summary>
+    public void Load(int[] strokes)
+    {
+        if (strokes is null) throw new ArgumentNullException(nameof(strokes));
+
+        _strokes.Clear();
+        _pendingPoints = 0;
+        _capturing = false;
+
+        int i = 0;
+        while (i < strokes.Length)
+        {
+            int k = strokes[i];
+            if (k <= 0) break;
+            if (i + 1 + 2 * k > strokes.Length) break;
+            _strokes.Add(k);
+            for (int p = 0; p < 2 * k; p++)
+                _strokes.Add(strokes[i + 1 + p]);
+            i += 1 + 2 * k;
+        }
+
+        RedrawRequested?.Invoke(this, EventArgs.Empty);
+    }
+
     /// <summary>
     /// Defensive copy of the current buffer wrapped in a
     /// <see cref="SignaturePadData"/>. Cheap; call only when the

src/PostIt/PostIt/Controls/SignaturePadView.axaml

@@ -0,0 +1,28 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:controls="using:PostIt.Controls"
+             x:Class="PostIt.Controls.SignaturePadView"
+             HorizontalAlignment="Stretch"
+             VerticalAlignment="Stretch">
+    <!--
+        Capture surface. The SignaturePadControl is render-agnostic,
+        so we host it inside a Border that is the capture area, and
+        overlay a Canvas for the visual feedback. The code-behind
+        repaints the canvas on every RedrawRequested. The Border size
+        is driven by the CaptureWidth / CaptureHeight styled properties.
+    -->
+    <Border x:Name="PadFrame"
+            BorderBrush="Black"
+            BorderThickness="1"
+            Background="White"
+            HorizontalAlignment="Left"
+            VerticalAlignment="Top"
+            ClipToBounds="True">
+        <Grid>
+            <controls:SignaturePadControl x:Name="InnerPad" />
+            <Canvas x:Name="InkLayer"
+                    Background="Transparent"
+                    IsHitTestVisible="False" />
+        </Grid>
+    </Border>
+</UserControl>

src/PostIt/PostIt/Controls/SignaturePadView.axaml.cs

@@ -0,0 +1,206 @@
+using System;
+using System.Collections.Generic;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Shapes;
+using Avalonia.Media;
+using PostIt.Models;
+
+namespace PostIt.Controls;
+
+/// <summary>
+/// Reusable signature-capture surface: wraps the render-agnostic
+/// <see cref="SignaturePadControl"/> in a sized <see cref="Border"/>
+/// (the hit-test region) with an overlay <see cref="Canvas"/> that
+/// the code-behind repaints from the control's stroke buffer. Owns
+/// the ink-rendering logic so every page that captures a signature
+/// (the dev-only <c>SignaturePage</c>, the estimate validation page,
+/// ...) shares one implementation.
+///
+/// Hosts bind <see cref="CaptureWidth"/>/<see cref="CaptureHeight"/>
+/// (DIPs, defaults 600×200) to size the surface. View models attach
+/// to the inner <see cref="SignaturePad"/> control (exposed here) to
+/// read snapshots, drive <c>Clear</c>, and subscribe to
+/// <see cref="SignaturePadControl.StrokeCompleted"/> /
+/// <see cref="SignaturePadControl.RedrawRequested"/> — the same
+/// contract the headless tests use, since a <see cref="UserControl"/>
+/// needs its XAML loaded to be drivable.
+/// </summary>
+public partial class SignaturePadView : UserControl
+{
+    private static readonly IBrush StrokeBrush = new SolidColorBrush(Color.FromRgb(0x10, 0x10, 0x10));
+    private const double StrokeThickness = 2.0;
+    private const double CoordinateMax = 10_000.0;
+
+    // Last size the ink layer was painted at. LayoutUpdated repaints
+    // only when this changes, so adding/removing polyline children
+    // (which invalidates layout) does not loop.
+    private Size _lastPaintedSize;
+
+    public static readonly StyledProperty<double> CaptureWidthProperty =
+        AvaloniaProperty.Register<SignaturePadView, double>(nameof(CaptureWidth), 600);
+
+    public static readonly StyledProperty<double> CaptureHeightProperty =
+        AvaloniaProperty.Register<SignaturePadView, double>(nameof(CaptureHeight), 200);
+
+    public double CaptureWidth
+    {
+        get => GetValue(CaptureWidthProperty);
+        set => SetValue(CaptureWidthProperty, value);
+    }
+
+    public double CaptureHeight
+    {
+        get => GetValue(CaptureHeightProperty);
+        set => SetValue(CaptureHeightProperty, value);
+    }
+
+    /// <summary>
+    /// The underlying capture control. View models attach to this to
+    /// read <see cref="SignaturePadControl.Snapshot"/> / call
+    /// <see cref="SignaturePadControl.Clear"/> and subscribe to its
+    /// events; this view repaints the ink layer from the same buffer.
+    /// </summary>
+    public SignaturePadControl SignaturePad => InnerPad;
+
+    public SignaturePadView()
+    {
+        InitializeComponent();
+
+        // Wire the capture area: the Pad is the control, the
+        // surrounding Border (PadFrame) is the hit-test region. For an
+        // inline control with no template, capture wiring happens on
+        // first measure, which is guaranteed before the user can
+        // interact, so attaching here is safe.
+        InnerPad.CaptureArea = PadFrame;
+        ApplyFrameSize();
+
+        InnerPad.RedrawRequested += OnPadRedrawRequested;
+        // Repaint once layout completes so an ink buffer loaded before
+        // the first arrange (e.g. an existing signature on reopen)
+        // still renders without waiting for a pointer event. The
+        // handler repaints only on a size change to avoid a layout
+        // loop (child changes invalidate layout → LayoutUpdated).
+        LayoutUpdated += OnLayoutUpdated;
+    }
+
+    private void OnLayoutUpdated(object? sender, EventArgs e)
+    {
+        var size = EffectivePadSize();
+        if (size != _lastPaintedSize)
+            Repaint();
+    }
+
+    protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
+    {
+        base.OnPropertyChanged(change);
+        if (change.Property == CaptureWidthProperty || change.Property == CaptureHeightProperty)
+        {
+            ApplyFrameSize();
+            Repaint();
+        }
+    }
+
+    private void ApplyFrameSize()
+    {
+        if (PadFrame is null) return;
+        PadFrame.Width = Math.Max(1, CaptureWidth);
+        PadFrame.Height = Math.Max(1, CaptureHeight);
+    }
+
+    private void OnPadRedrawRequested(object? sender, EventArgs e) => Repaint();
+
+    /// <summary>Defensive copy of the current buffer.</summary>
+    public SignaturePadData Snapshot() => InnerPad.Snapshot();
+
+    /// <summary>Forget every captured stroke.</summary>
+    public void Clear() => InnerPad.Clear();
+
+    /// <summary>Wire-format strokes, forwarded from the inner control.</summary>
+    public IReadOnlyList<int> Strokes => InnerPad.Strokes;
+
+    /// <summary>
+    /// The effective ink surface size: the arranged bounds when
+    /// available, otherwise the explicitly sized
+    /// <see cref="CaptureWidth"/>/<see cref="CaptureHeight"/>. The
+    /// latter covers a repaint triggered before the first layout pass
+    /// (e.g. loading an existing signature on reopen), when Bounds is
+    /// still empty.
+    /// </summary>
+    private Size EffectivePadSize()
+    {
+        var w = PadFrame.Bounds.Width > 0 ? PadFrame.Bounds.Width : PadFrame.Width;
+        var h = PadFrame.Bounds.Height > 0 ? PadFrame.Bounds.Height : PadFrame.Height;
+        if (w <= 0 || double.IsNaN(w) || h <= 0 || double.IsNaN(h))
+            return default;
+        return new Size(w, h);
+    }
+
+    private void Repaint()
+    {
+        if (InkLayer is null) return;
+
+        var size = EffectivePadSize();
+        if (size == default) return;
+        _lastPaintedSize = size;
+
+        InkLayer.Children.Clear();
+        var w = size.Width;
+        var h = size.Height;
+
+        var pending = InnerPad.PendingStroke;
+        var strokes = InnerPad.Strokes;
+        int sealedCount = strokes.Count - pending.Count;
+        if (sealedCount < 0)
+        {
+            sealedCount = 0;
+        }
+
+        int i = 0;
+        while (i < sealedCount)
+        {
+            int k = strokes[i];
+            if (k <= 0) break;
+            i++; // skip the length prefix
+
+            var poly = new Polyline
+            {
+                Stroke = StrokeBrush,
+                StrokeThickness = StrokeThickness,
+                StrokeLineCap = PenLineCap.Round,
+                StrokeJoin = PenLineJoin.Round,
+            };
+            var pts = new List<Point>(k);
+            for (int p = 0; p < k; p++)
+            {
+                int nx = strokes[i++];
+                int ny = strokes[i++];
+                pts.Add(new Point(nx / CoordinateMax * w, ny / CoordinateMax * h));
+            }
+            poly.Points = pts;
+            InkLayer.Children.Add(poly);
+        }
+
+        if (pending.Count > 0)
+        {
+            var poly = new Polyline
+            {
+                Stroke = StrokeBrush,
+                StrokeThickness = StrokeThickness,
+                StrokeLineCap = PenLineCap.Round,
+                StrokeJoin = PenLineJoin.Round,
+            };
+
+            var pts = new List<Point>(pending.Count / 2);
+            for (int p = 0; p < pending.Count; p += 2)
+            {
+                int nx = pending[p];
+                int ny = pending[p + 1];
+                pts.Add(new Point(nx / CoordinateMax * w, ny / CoordinateMax * h));
+            }
+
+            poly.Points = pts;
+            InkLayer.Children.Add(poly);
+        }
+    }
+}

src/PostIt/PostIt/Helpers/FileSaveHelpers.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+
+namespace PostIt.Helpers;
+
+/// <summary>
+/// Saves a downloaded byte payload to a file chosen by the user through
+/// the platform save picker. This is the first file-save (as opposed to
+/// file-open) helper in PostIt; the open picker is already used for blog
+/// attachment and avatar uploads
+/// (<see cref="Views.Blogs.BlogsPage"/>, <see cref="Views.Layout.SettingsPage"/>).
+///
+/// <para>The <c>TopLevel</c> hosting the picker is resolved from the
+/// application's root <c>MainView</c> (<c>App.View</c>), which works for
+/// both the desktop and single-view lifetimes.</para>
+/// </summary>
+public static class FileSaveHelpers
+{
+    /// <summary>
+    /// Prompt the user to choose a destination and write
+    /// <paramref name="content"/> to it. Returns false when the user
+    /// cancels the picker; throws on IO/platform errors so the caller
+    /// can surface them.
+    /// </summary>
+    public static async Task<bool> SaveAsync(
+        string suggestedName,
+        string defaultExtension,
+        byte[] content,
+        CancellationToken ct = default)
+    {
+        var view = (Application.Current as App)?.View;
+        var topLevel = view is null ? null : TopLevel.GetTopLevel(view);
+        if (topLevel is null)
+            throw new InvalidOperationException("Aucune fenêtre active pour enregistrer le fichier.");
+
+        var file = await topLevel.StorageProvider.SaveFilePickerAsync(new FilePickerSaveOptions
+        {
+            Title = "Enregistrer sous",
+            DefaultExtension = defaultExtension,
+            SuggestedFileName = suggestedName,
+            FileTypeChoices = new[]
+            {
+                new FilePickerFileType($"{defaultExtension.ToUpper()} file")
+                {
+                    Patterns = new[] { $"*.{defaultExtension}" }
+                }
+            }
+        }).ConfigureAwait(true);
+
+        if (file is null)
+            return false; // user cancelled
+
+        await using var stream = await file.OpenWriteAsync().ConfigureAwait(true);
+        await stream.WriteAsync(content, ct).ConfigureAwait(true);
+        return true;
+    }
+}

src/PostIt/PostIt/Helpers/ServiceCollectionHelpers.cs

@@ -31,6 +31,7 @@ public static class ServiceCollectionHelpers
             () => settings.Authentication?.Authority);
         var billingClient = new BillingApiClient(api, () => settings.ApiUrl);
         var estimateClient = new EstimateApiClient(api, () => settings.ApiUrl);
+        var frontClient = new FrontOfficeApiClient(api, () => settings.ApiUrl);
         var userDirectory = new UserDirectory(userSearchClient);
         var reverseGeocoding = new NominatimReverseGeocodingService();
 
@@ -63,6 +64,7 @@ public static class ServiceCollectionHelpers
         services.AddTransient<ProviderOngoingRequestsPage>();
         services.AddTransient<EstimateEditionPage>();
         services.AddTransient<EstimateListPage>();
+        services.AddTransient<EstimateValidationPage>();
 
         // ViewModels
         services.AddSingleton(settings);
@@ -74,6 +76,7 @@ public static class ServiceCollectionHelpers
         services.AddSingleton(activityClient);
         services.AddSingleton(billingClient);
         services.AddSingleton(estimateClient);
+        services.AddSingleton(frontClient);
         services.AddSingleton<IReverseGeocodingService>(reverseGeocoding);
         services.AddSingleton<IUserDirectory>(userDirectory);
         services.AddSingleton<HomePageViewModel>();

src/PostIt/PostIt/PostIt.csproj

@@ -5,8 +5,8 @@
     <LangVersion>latest</LangVersion>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <AvaloniaResource Include="Assets\**" />
@@ -36,6 +36,7 @@
     <PackageReference Include="IdentityModel.OidcClient" />
     <PackageReference Include="MarkdownViewer.Core" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" />
+    <PackageReference Include="Mono.Options" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="../../Yavsc.Abstract/Yavsc.Abstract.csproj" />

src/PostIt/PostIt/Services/YavscApiClient.cs

@@ -478,6 +478,41 @@ public class YavscApiClient : IYavscApiClient, IAsyncDisposable
         return "Avatar mis à jour.";
     }
 
+    /// <summary>
+    /// Download a binary resource (PDF, TeX, …) from the API. Unlike
+    /// <see cref="CallAsync{T}(HttpMethod, string, object?, CancellationToken)"/>,
+    /// which JSON-decodes the response, this returns the raw response
+    /// bytes. Reuses the same Bearer-token attach + 401-refresh-retry-once
+    /// contract as <see cref="SetAvatarAsync"/>.
+    /// </summary>
+    public virtual async Task<byte[]> DownloadAsync(
+        HttpMethod method,
+        string path,
+        CancellationToken ct = default)
+    {
+        if (_tokens is null)
+            throw new InvalidOperationException("Not logged in. Call LoginInteractiveAsync first.");
+
+        await EnsureFreshTokenAsync(ct).ConfigureAwait(false);
+
+        var sendOnce = async () =>
+        {
+            using var request = new HttpRequestMessage(method, path);
+            return await Http.SendAsync(request, ct).ConfigureAwait(false);
+        };
+
+        var response = await sendOnce().ConfigureAwait(false);
+        if (response.StatusCode == HttpStatusCode.Unauthorized)
+        {
+            response.Dispose();
+            await ForceRefreshAsync(ct).ConfigureAwait(false);
+            response = await sendOnce().ConfigureAwait(false);
+        }
+
+        await EnsureSuccessOrThrowAsync(response, ct).ConfigureAwait(false);
+        return await response.Content.ReadAsByteArrayAsync(ct).ConfigureAwait(false);
+    }
+
     public async Task LogoutAsync()
     {
         _store.Clear();

src/PostIt/PostIt/ViewLocator.cs

@@ -55,6 +55,7 @@ public class ViewLocator : IDataTemplate
             ProviderOngoingRequestsPageViewModel => services.GetRequiredService<ProviderOngoingRequestsPage>(),
             EstimateEditionPageViewModel => services.GetRequiredService<EstimateEditionPage>(),
             EstimateListPageViewModel => services.GetRequiredService<EstimateListPage>(),
+            EstimateValidationPageViewModel => services.GetRequiredService<EstimateValidationPage>(),
             null => new TextBlock { Text = "No view for <null>" },
             _ => new TextBlock { Text = $"No view for {data.GetType().Name}" }
         };

src/PostIt/PostIt/ViewModels/Activity/BillingQueriesPageViewModel.cs

@@ -7,6 +7,7 @@ using System.Threading.Tasks;
 using Avalonia;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
+using Microsoft.Extensions.DependencyInjection;
 using PostIt.Helpers;
 using Yavsc;
 using Yavsc.Api.Client;
@@ -130,11 +131,13 @@ public partial class BillingQueriesPageViewModel : ViewModelBase, IActionStatusV
         try
         {
             var details = await _billingClient.GetQueryAsync(Form.ActionName, SelectedQuery.Id).ConfigureAwait(true);
+            var frontClient = app.ServiceProvider?.GetRequiredService<FrontOfficeApiClient>();
             var vm = new BillingQueryDetailsPageViewModel(
                 Activity,
                 Performer,
                 Form,
                 _billingClient,
+                frontClient,
                 details,
                 IsReadOnly);
             await app.PushPageAsync(vm).ConfigureAwait(true);
@@ -171,5 +174,9 @@ public partial class BillingQueriesPageViewModel : ViewModelBase, IActionStatusV
     }
 
     private static bool IsOngoingStatus(QueryStatus status)
-        => status is QueryStatus.Inserted or QueryStatus.Accepted or QueryStatus.InProgress;
+        => status is QueryStatus.Inserted
+            or QueryStatus.Accepted
+            or QueryStatus.ProAccepted
+            or QueryStatus.ClientAccepted
+            or QueryStatus.InProgress;
 }

src/PostIt/PostIt/ViewModels/Activity/BillingQueryDetailsPageViewModel.cs

@@ -14,6 +14,7 @@ namespace PostIt.ViewModels;
 public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly BillingApiClient _billingClient;
+    private readonly FrontOfficeApiClient _frontClient;
     private readonly BillingQueryDetailsDto _details;
 
     public ActivityInfo Activity { get; }
@@ -68,6 +69,7 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         ActivityUserDisplayItem performer,
         CommandFormSummary form,
         BillingApiClient billingClient,
+        FrontOfficeApiClient frontClient,
         BillingQueryDetailsDto details,
         bool isReadOnly)
     {
@@ -75,6 +77,7 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         Performer = performer ?? throw new ArgumentNullException(nameof(performer));
         Form = form ?? throw new ArgumentNullException(nameof(form));
         _billingClient = billingClient ?? throw new ArgumentNullException(nameof(billingClient));
+        _frontClient = frontClient ?? throw new ArgumentNullException(nameof(frontClient));
         _details = details ?? throw new ArgumentNullException(nameof(details));
         IsReadOnly = isReadOnly;
 
@@ -131,6 +134,53 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         await app.GoBackAsync().ConfigureAwait(true);
     }
 
+    /// <summary>
+    /// Download the estimate linked to this command as a LaTeX source
+    /// (<c>GET api/v1/front/query/{Id}/estimate.tex</c>). The estimate is
+    /// resolved server-side from <c>Estimate.CommandId == query Id</c>.
+    /// </summary>
+    [RelayCommand]
+    public async Task DownloadTexAsync()
+    {
+        await DownloadAsync(
+            () => _frontClient.GetEstimateTexAsync(_details.Id),
+            $"devis-{_details.Id}", "tex").ConfigureAwait(true);
+    }
+
+    /// <summary>
+    /// Download the estimate linked to this command as a compiled PDF
+    /// (<c>GET api/v1/front/query/{Id}/estimate.pdf</c>). Requires
+    /// <c>texi2pdf</c> on the server host.
+    /// </summary>
+    [RelayCommand]
+    public async Task DownloadPdfAsync()
+    {
+        await DownloadAsync(
+            () => _frontClient.GetEstimatePdfAsync(_details.Id),
+            $"devis-{_details.Id}", "pdf").ConfigureAwait(true);
+    }
+
+    private async Task DownloadAsync(Func<Task<byte[]>> fetch, string fileName, string ext)
+    {
+        IsBusy = true;
+        try
+        {
+            var bytes = await fetch().ConfigureAwait(true);
+            var saved = await FileSaveHelpers.SaveAsync(fileName, ext, bytes).ConfigureAwait(true);
+            this.SetInfoStatus(saved
+                ? $"Fichier .{ext} enregistré."
+                : "Téléchargement annulé.");
+        }
+        catch (Exception ex)
+        {
+            this.SetErrorStatus($"Échec du téléchargement: {ex.Message}");
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
     private static string EmptyAsPlaceholder(string? value, string placeholder)
         => string.IsNullOrWhiteSpace(value) ? placeholder : value;
 
@@ -166,6 +216,8 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         => status switch
         {
             QueryStatus.Accepted => "#E6F7EC",
+            QueryStatus.ProAccepted => "#E6F7EC",
+            QueryStatus.ClientAccepted => "#E1F5FE",
             QueryStatus.InProgress => "#FFF4D6",
             QueryStatus.Rejected => "#FDECEA",
             QueryStatus.Failed => "#ECEFF1",
@@ -177,6 +229,8 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         => status switch
         {
             QueryStatus.Accepted => "#2E7D32",
+            QueryStatus.ProAccepted => "#2E7D32",
+            QueryStatus.ClientAccepted => "#1565C0",
             QueryStatus.InProgress => "#B26A00",
             QueryStatus.Rejected => "#C62828",
             QueryStatus.Failed => "#607D8B",
@@ -188,6 +242,8 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         => status switch
         {
             QueryStatus.Accepted => "#1B5E20",
+            QueryStatus.ProAccepted => "#1B5E20",
+            QueryStatus.ClientAccepted => "#0D47A1",
             QueryStatus.InProgress => "#7A4A00",
             QueryStatus.Rejected => "#8E0000",
             QueryStatus.Failed => "#37474F",
@@ -199,6 +255,8 @@ public partial class BillingQueryDetailsPageViewModel : ViewModelBase, IActionSt
         => status switch
         {
             QueryStatus.Accepted => "OK",
+            QueryStatus.ProAccepted => "P",
+            QueryStatus.ClientAccepted => "C",
             QueryStatus.InProgress => "~",
             QueryStatus.Rejected => "!",
             QueryStatus.Failed => "X",

src/PostIt/PostIt/ViewModels/Activity/EstimateListPageViewModel.cs

@@ -5,6 +5,7 @@ using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Threading.Tasks;
+using Avalonia;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
 using PostIt.Helpers;
@@ -18,10 +19,10 @@ namespace PostIt.ViewModels;
 /// </summary>
 public enum EstimateListPerspective
 {
-    /// <summary>« Mes devis à valider » — l'utilisateur courant est le client.</summary>
+    /// <summary>« Devis en attente de signature client » — l'utilisateur courant est le client.</summary>
     Client,
 
-    /// <summary>« Mes devis en attente » — l'utilisateur courant est le fournisseur.</summary>
+    /// <summary>« Devis en attente de signature fournisseur » — l'utilisateur courant est le fournisseur.</summary>
     Provider,
 }
 
@@ -32,14 +33,15 @@ public enum EstimateListPerspective
 public partial class EstimateListPageViewModel : ViewModelBase, IActionStatusViewModel
 {
     private readonly EstimateApiClient _estimateClient;
+    private readonly FrontOfficeApiClient _frontClient;
     private readonly EstimateListPerspective _perspective;
     private List<EstimateDto> _allEstimates = new();
 
     public EstimateListPerspective Perspective => _perspective;
 
     public string Title => _perspective == EstimateListPerspective.Client
-        ? "Mes devis à valider"
-        : "Mes devis en attente";
+        ? "Devis en attente de signature client"
+        : "Devis en attente de signature fournisseur";
 
     public string Subtitle => _perspective == EstimateListPerspective.Client
         ? "Point de vue client"
@@ -83,10 +85,14 @@ public partial class EstimateListPageViewModel : ViewModelBase, IActionStatusVie
         protected set { _ = value; }
     }
 
-    public EstimateListPageViewModel(EstimateApiClient estimateClient, EstimateListPerspective perspective)
+    public EstimateListPageViewModel(
+        EstimateApiClient estimateClient,
+        EstimateListPerspective perspective,
+        FrontOfficeApiClient frontClient)
     {
         _estimateClient = estimateClient ?? throw new ArgumentNullException(nameof(estimateClient));
         _perspective = perspective;
+        _frontClient = frontClient ?? throw new ArgumentNullException(nameof(frontClient));
     }
 
     public Task InitializeAsync() => RefreshAsync();
@@ -153,4 +159,25 @@ public partial class EstimateListPageViewModel : ViewModelBase, IActionStatusVie
     private static bool ContainsInsensitive(string? value, string query)
         => !string.IsNullOrWhiteSpace(value)
            && value.Contains(query, StringComparison.OrdinalIgnoreCase);
+
+    /// <summary>
+    /// Open the estimate validation (accept/reject with signature)
+    /// page for a specific estimate. The perspective the list was
+    /// opened in is forwarded as the actor-role UI hint; the server
+    /// independently enforces the real authorization.
+    /// </summary>
+    [RelayCommand]
+    private async Task OpenEstimateAsync(EstimateDto? estimate)
+    {
+        if (estimate is null) return;
+
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+
+        var vm = new EstimateValidationPageViewModel(estimate, _perspective, _frontClient);
+        await app.PushPageAsync(vm).ConfigureAwait(true);
+    }
 }

src/PostIt/PostIt/ViewModels/Activity/EstimateValidationPageViewModel.cs

@@ -0,0 +1,399 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Avalonia;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PostIt.Controls;
+using PostIt.Helpers;
+using PostIt.Models;
+using Yavsc.Api.Client;
+using Yavsc.Models.Billing;
+
+namespace PostIt.ViewModels;
+
+/// <summary>
+/// Validation (accept / reject) of a single estimate, with optional
+/// signatures. Backs the estimate validation page opened from
+/// <see cref="EstimateListPageViewModel"/> for either perspective.
+///
+/// <para>Two signatures are shown, each in its own pad: the provider's
+/// (Pro) and the client's (Client). Both are rendered from the estimate
+/// payload when present, so reopening a partly-signed estimate shows
+/// what was already captured. Only the pad matching the current
+/// <see cref="EstimateListPerspective"/> is writable — the server
+/// (<c>POST api/v1/front/query/accept</c>) independently enforces the
+/// same rule (it resolves the caller's role from the authenticated user
+/// vs the query's <c>PerformerId</c>/<c>ClientId</c>), and the UI marks
+/// the other pad read-only. The billing code sent to the server is the
+/// estimate's <see cref="EstimateDto.CommandType"/> and the query id is
+/// its <see cref="EstimateDto.CommandId"/>.</para>
+/// </summary>
+public partial class EstimateValidationPageViewModel : ViewModelBase, IActionStatusViewModel
+{
+    private readonly EstimateDto _estimate;
+    private readonly EstimateListPerspective _perspective;
+    private readonly FrontOfficeApiClient _frontClient;
+    private SignaturePadControl? _proPad;
+    private SignaturePadControl? _clientPad;
+
+    public string Title => _estimate.Title;
+    public string Description => _estimate.Description;
+    public long EstimateId => _estimate.Id;
+    public string CommandType => _estimate.CommandType;
+    public IReadOnlyList<EstimateLineDto> Bill => _estimate.Bill;
+    public DateTime ProviderValidationDate => _estimate.ProviderValidationDate;
+    public DateTime ClientValidationDate => _estimate.ClientValidationDate;
+
+    public string RoleLabel => _perspective == EstimateListPerspective.Provider
+        ? "Vous validez en tant que prestataire"
+        : "Vous validez en tant que client";
+
+    /// <summary>
+    /// True when the current user may sign the provider's signature
+    /// (i.e. they opened the list as the provider). The other party's
+    /// pad is read-only.
+    /// </summary>
+    public bool CanWritePro => _perspective == EstimateListPerspective.Provider;
+
+    /// <summary>
+    /// True when the current user may sign the client's signature
+    /// (i.e. they opened the list as the client).
+    /// </summary>
+    public bool CanWriteClient => _perspective == EstimateListPerspective.Client;
+
+    /// <summary>
+    /// Human-readable summary of who has already validated this
+    /// estimate, shown above the signature pads.
+    /// </summary>
+    public string ValidationStateText
+    {
+        get
+        {
+            var parts = new List<string>();
+            if (ProviderValidationDate != default)
+                parts.Add($"Prestataire validé le {ProviderValidationDate.ToLocalTime():g}");
+            if (ClientValidationDate != default)
+                parts.Add($"Client validé le {ClientValidationDate.ToLocalTime():g}");
+            return parts.Count == 0 ? "Devis en attente de validation." : string.Join(" · ", parts);
+        }
+    }
+
+    /// <summary>
+    /// True when the estimate has a linked query to accept/reject.
+    /// Estimates without a <see cref="EstimateDto.CommandId"/> are
+    /// templates and cannot be validated through the front-office
+    /// endpoint.
+    /// </summary>
+    public bool HasCommand => _estimate.CommandId is not null;
+
+    [ObservableProperty]
+    public partial bool IsBusy { get; set; }
+
+    [ObservableProperty]
+    public partial string StatusMessage { get; set; } = "Prêt.";
+
+    [ObservableProperty]
+    public partial StatusNotice ActionStatus { get; set; } = StatusNotice.Info("Prêt.");
+
+    /// <summary>Stroke/point counts for the writable pad.</summary>
+    [ObservableProperty]
+    public partial int StrokeCount { get; set; }
+
+    [ObservableProperty]
+    public partial int PointCount { get; set; }
+
+    /// <summary>True when the writable pad holds a signature.</summary>
+    [ObservableProperty]
+    public partial bool HasSignature { get; set; }
+
+    [ObservableProperty]
+    public partial bool HasProSignature { get; set; }
+
+    [ObservableProperty]
+    public partial bool HasClientSignature { get; set; }
+
+    [ObservableProperty]
+    public partial string ProSignatureHint { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string ClientSignatureHint { get; set; } = string.Empty;
+
+    public override bool CanNavigateNext
+    {
+        get => false;
+        protected set { _ = value; }
+    }
+
+    public override bool CanNavigatePrevious
+    {
+        get => true;
+        protected set { _ = value; }
+    }
+
+    public EstimateValidationPageViewModel(
+        EstimateDto estimate,
+        EstimateListPerspective perspective,
+        FrontOfficeApiClient frontClient)
+    {
+        _estimate = estimate ?? throw new ArgumentNullException(nameof(estimate));
+        _perspective = perspective;
+        _frontClient = frontClient ?? throw new ArgumentNullException(nameof(frontClient));
+    }
+
+    /// <summary>
+    /// Bind the page's two signature pads (the inner controls of the
+    /// page's <see cref="SignaturePadView"/>s): the provider's pad and
+    /// the client's pad. Called from the view's code-behind once the
+    /// view is in the visual tree. Marks the non-author pad read-only,
+    /// then renders any signatures already carried on the estimate
+    /// payload.
+    /// </summary>
+    public void Attach(SignaturePadControl proPad, SignaturePadControl clientPad)
+    {
+        if (proPad is null) throw new ArgumentNullException(nameof(proPad));
+        if (clientPad is null) throw new ArgumentNullException(nameof(clientPad));
+        Detach();
+        _proPad = proPad;
+        _clientPad = clientPad;
+        _proPad.IsReadOnly = !CanWritePro;
+        _clientPad.IsReadOnly = !CanWriteClient;
+        _proPad.RedrawRequested += OnPadRedraw;
+        _clientPad.RedrawRequested += OnPadRedraw;
+        LoadExistingSignatures();
+        RefreshFromPad();
+    }
+
+    public void Detach()
+    {
+        if (_proPad is not null)
+            _proPad.RedrawRequested -= OnPadRedraw;
+        if (_clientPad is not null)
+            _clientPad.RedrawRequested -= OnPadRedraw;
+        _proPad = null;
+        _clientPad = null;
+    }
+
+    private void OnPadRedraw(object? sender, EventArgs e) => RefreshFromPad();
+
+    /// <summary>The pad the current user may sign in.</summary>
+    private SignaturePadControl? WritablePad => CanWritePro ? _proPad : _clientPad;
+
+    /// <summary>
+    /// Render the signatures already stored for this estimate back into
+    /// their pads. The strokes are carried on the estimate payload as
+    /// two dedicated slots — <see cref="EstimateDto.SignaturePro"/> and
+    /// <see cref="EstimateDto.SignatureClient"/> — so each pad loads
+    /// its own side directly, in the same wire format PostIt captured.
+    /// No network round-trip.
+    /// </summary>
+    public void LoadExistingSignatures()
+    {
+        LoadSide(_proPad, _estimate.SignaturePro);
+        LoadSide(_clientPad, _estimate.SignatureClient);
+        RefreshFromPad();
+    }
+
+    private static void LoadSide(SignaturePadControl? pad, EstimateSignatureDto? sig)
+    {
+        if (pad is null || sig is null) return;
+        if (sig.Strokes is { Length: > 0 } strokes)
+            pad.Load(strokes);
+    }
+
+    private void RefreshFromPad()
+    {
+        HasProSignature = _proPad?.Snapshot().IsEmpty == false;
+        HasClientSignature = _clientPad?.Snapshot().IsEmpty == false;
+
+        ProSignatureHint = CanWritePro
+            ? (HasProSignature ? "Signé — dessinez pour remplacer" : "Signez ici en tant que prestataire")
+            : (HasProSignature ? "Signature du prestataire (lecture seule)" : "En attente de signature du prestataire");
+        ClientSignatureHint = CanWriteClient
+            ? (HasClientSignature ? "Signé — dessinez pour remplacer" : "Signez ici en tant que client")
+            : (HasClientSignature ? "Signature du client (lecture seule)" : "En attente de signature du client");
+
+        var pad = WritablePad;
+        if (pad is null) return;
+        var snap = pad.Snapshot();
+        StrokeCount = snap.StrokeCount;
+        PointCount = snap.PointCount;
+        HasSignature = !snap.IsEmpty;
+    }
+
+    partial void OnIsBusyChanged(bool value)
+    {
+        ValidateCommand.NotifyCanExecuteChanged();
+        RejectCommand.NotifyCanExecuteChanged();
+    }
+
+    partial void OnHasSignatureChanged(bool value)
+        => ValidateCommand.NotifyCanExecuteChanged();
+
+    private bool CanValidate => !IsBusy && HasSignature && HasCommand;
+
+    private bool CanReject => !IsBusy && HasCommand;
+
+    [RelayCommand(CanExecute = nameof(CanValidate))]
+    public async Task ValidateAsync()
+    {
+        if (_estimate.CommandId is not long queryId)
+        {
+            this.SetWarningStatus("Ce devis n'est pas lié à une demande et ne peut être validé.");
+            return;
+        }
+        var pad = WritablePad;
+        if (pad is null || pad.Snapshot().IsEmpty)
+        {
+            this.SetWarningStatus("Veuillez signer avant de valider.");
+            return;
+        }
+
+        var snap = pad.Snapshot();
+        IsBusy = true;
+        try
+        {
+            var body = new QueryAcceptanceRequestDto
+            {
+                Strokes = snap.Strokes,
+                CoordinateMax = SignaturePadData.CoordinateMax,
+                CapturedAtUtc = DateTime.UtcNow,
+                // Declare which side the caller is signing as, so the
+                // server stores the signature under the right author
+                // (Pro/Client) even when one user is both parties.
+                SignatureType = CanWritePro ? SignatureType.Pro : SignatureType.Client,
+            };
+
+            await _frontClient.AcceptQueryAsync(_estimate.CommandType, queryId, body)
+                .ConfigureAwait(true);
+
+            this.SetInfoStatus("Devis validé.");
+            await GoBackAsync().ConfigureAwait(true);
+        }
+        catch (HttpRequestException ex) when (ex.StatusCode is System.Net.HttpStatusCode.Forbidden)
+        {
+            this.SetWarningStatus("Vous n'êtes pas partie à ce devis.");
+        }
+        catch (HttpRequestException ex) when (ex.StatusCode is System.Net.HttpStatusCode.BadRequest)
+        {
+            this.SetWarningStatus($"Validation refusée: {ex.Message}");
+        }
+        catch (Exception ex)
+        {
+            this.SetErrorStatus($"Erreur: {ex.Message}");
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanReject))]
+    public async Task RejectAsync()
+    {
+        if (_estimate.CommandId is not long queryId)
+        {
+            this.SetWarningStatus("Ce devis n'est pas lié à une demande et ne peut être refusé.");
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            await _frontClient.RejectQueryAsync(_estimate.CommandType, queryId)
+                .ConfigureAwait(true);
+
+            this.SetInfoStatus("Devis refusé.");
+            await GoBackAsync().ConfigureAwait(true);
+        }
+        catch (HttpRequestException ex) when (ex.StatusCode is System.Net.HttpStatusCode.Forbidden)
+        {
+            this.SetWarningStatus("Vous n'êtes pas partie à ce devis.");
+        }
+        catch (Exception ex)
+        {
+            this.SetErrorStatus($"Erreur: {ex.Message}");
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand]
+    public void ClearSignature()
+    {
+        WritablePad?.Clear();
+        RefreshFromPad();
+    }
+
+    /// <summary>
+    /// Download the estimate as a LaTeX source document. The server
+    /// renders the Estimate_tex template to a <c>.tex</c> byte stream
+    /// (<c>GET api/v1/front/query/{CommandId}/estimate.tex</c>); the
+    /// user picks a destination via the platform save picker.
+    /// </summary>
+    [RelayCommand]
+    public async Task DownloadTexAsync()
+    {
+        await DownloadAsync(
+            () => _frontClient.GetEstimateTexAsync(_estimate.CommandId!.Value),
+            $"devis-{EstimateId}", "tex").ConfigureAwait(true);
+    }
+
+    /// <summary>
+    /// Download the estimate as a compiled PDF
+    /// (<c>GET api/v1/front/query/{CommandId}/estimate.pdf</c>).
+    /// Requires <c>texi2pdf</c> on the server host; a failure is
+    /// surfaced as a status message.
+    /// </summary>
+    [RelayCommand]
+    public async Task DownloadPdfAsync()
+    {
+        await DownloadAsync(
+            () => _frontClient.GetEstimatePdfAsync(_estimate.CommandId!.Value),
+            $"devis-{EstimateId}", "pdf").ConfigureAwait(true);
+    }
+
+    private async Task DownloadAsync(Func<Task<byte[]>> fetch, string fileName, string ext)
+    {
+        if (_estimate.CommandId is not long)
+        {
+            this.SetWarningStatus("Ce devis n'est pas lié à une demande.");
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var bytes = await fetch().ConfigureAwait(true);
+            var saved = await FileSaveHelpers.SaveAsync(fileName, ext, bytes).ConfigureAwait(true);
+            this.SetInfoStatus(saved
+                ? $"Fichier .{ext} enregistré."
+                : "Téléchargement annulé.");
+        }
+        catch (Exception ex)
+        {
+            this.SetErrorStatus($"Échec du téléchargement: {ex.Message}");
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand]
+    private async Task BackAsync() => await GoBackAsync().ConfigureAwait(true);
+
+    private static async Task GoBackAsync()
+    {
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+        await app.GoBackAsync().ConfigureAwait(true);
+    }
+}

src/PostIt/PostIt/ViewModels/Activity/ProviderOngoingRequestsPageViewModel.cs

@@ -8,6 +8,7 @@ using System.Threading.Tasks;
 using Avalonia;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
+using Microsoft.Extensions.DependencyInjection;
 using PostIt.Helpers;
 using Yavsc;
 using Yavsc.Abstract.Workflow;
@@ -153,12 +154,14 @@ public partial class ProviderOngoingRequestsPageViewModel : ViewModelBase, IActi
                 .GetQueryAsync(SelectedQuery.BillingCode, SelectedQuery.Id)
                 .ConfigureAwait(true);
             var (activity, performer, form) = BuildNavigationContext(SelectedQuery);
+            var frontClient = app.ServiceProvider?.GetRequiredService<FrontOfficeApiClient>();
 
             var vm = new BillingQueryDetailsPageViewModel(
                 activity,
                 performer,
                 form,
                 _billingClient,
+                frontClient,
                 details,
                 isReadOnly: false);
 
@@ -344,11 +347,13 @@ public partial class ProviderOngoingRequestsPageViewModel : ViewModelBase, IActi
         => status switch
         {
             QueryStatus.InProgress => 0,
-            QueryStatus.Accepted => 1,
-            QueryStatus.Inserted => 2,
-            QueryStatus.Success => 3,
-            QueryStatus.Rejected => 4,
-            QueryStatus.Failed => 5,
+            QueryStatus.ClientAccepted => 1,
+            QueryStatus.ProAccepted => 2,
+            QueryStatus.Accepted => 2,
+            QueryStatus.Inserted => 3,
+            QueryStatus.Success => 4,
+            QueryStatus.Rejected => 5,
+            QueryStatus.Failed => 6,
             _ => 99,
         };
 

src/PostIt/PostIt/ViewModels/Layout/HomePageViewModel.cs

@@ -90,7 +90,13 @@ public class HomePageViewModel : ViewModelBase
             throw new InvalidOperationException("Client devis indisponible.");
         }
 
-        var vm = new EstimateListPageViewModel(estimateClient, perspective);
+        var frontClient = app.ServiceProvider?.GetRequiredService<FrontOfficeApiClient>();
+        if (frontClient is null)
+        {
+            throw new InvalidOperationException("Client front-office indisponible.");
+        }
+
+        var vm = new EstimateListPageViewModel(estimateClient, perspective, frontClient);
         await vm.InitializeAsync();
         await app.PushPageAsync(vm);
     }

src/PostIt/PostIt/ViewModels/Settings/Settings.cs

@@ -259,25 +259,13 @@ public partial class Settings : ViewModelBase
                 return;
             }
         }
-        if (Environment.GetEnvironmentVariable("POSTIT_SETTINGS_JSON") is string envJson
-            && !string.IsNullOrWhiteSpace(envJson))
+
+        var app = App.Current as App;
+        if (app!=null)
+        if (app.CliConfigFileSpecification!=null)
         {
-            Console.WriteLine("🔎 Loading settings from POSTIT_SETTINGS_JSON environment variable.");
-            FileInfo configByEnvFileInfo = new FileInfo(envJson);
-            if (!configByEnvFileInfo.Exists)
-            {
-                throw new Exception($"🩎 Settings file not found at {configByEnvFileInfo.FullName}");
-            }
-            string json = File.ReadAllText(configByEnvFileInfo.FullName);
-            ApplyJson(json, "POSTIT_SETTINGS_JSON");
-            SettingsFileFullName = configByEnvFileInfo.FullName;
-            Loaded = true;
-            return;
+            SettingsFileFullName = app.CliConfigFileSpecification;
         }
-        string configDir = Path.Combine(
-            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
-            "PostIt"
-        );
 
         if (SettingsFileFullName is not null)
         {
@@ -287,10 +275,18 @@ public partial class Settings : ViewModelBase
         else if (Environment.GetEnvironmentVariable("POSTIT_SETTINGS_JSON") is string envPath
             && !string.IsNullOrWhiteSpace(envPath))
         {
-            SettingsFileFullName = envPath;
+            FileInfo configByEnvFileInfo = new FileInfo(envPath);
+            if (!configByEnvFileInfo.Exists)
+            {
+                throw new Exception($"🩎 Settings file not found at {configByEnvFileInfo.FullName}");
+            }
+            SettingsFileFullName = configByEnvFileInfo.FullName;
         }
         else
         {
+             string configDir = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+                "PostIt");
             SettingsFileFullName = Path.Combine(configDir, "postit-settings.json");
         }
 
@@ -536,6 +532,7 @@ public partial class Settings : ViewModelBase
     /// </summary>
     partial void OnIsDirtyChanged(bool value) => SaveCommand.NotifyCanExecuteChanged();
 
+
     public override bool CanNavigateNext { get => false; protected set => throw new System.NotImplementedException(); }
     public override bool CanNavigatePrevious { get => true; protected set => throw new System.NotImplementedException(); }
 }

src/PostIt/PostIt/ViewModels/Signature/SignaturePageViewModel.cs

@@ -85,10 +85,12 @@ public partial class SignaturePageViewModel : ViewModelBase, IActionStatusViewMo
     }
 
     /// <summary>
-    /// Bind a freshly-constructed (or re-templated) control to this
-    /// VM. Called from the view's code-behind once the control has
-    /// been added to the visual tree and its template applied (so
-    /// <see cref="SignaturePadControl.CaptureArea"/> is wired).
+    /// Bind the inner <see cref="SignaturePadControl"/> of the page's
+    /// <see cref="SignaturePadView"/> to this VM. Called from the
+    /// page's code-behind once the view is in the visual tree (so the
+    /// control's <see cref="SignaturePadControl.CaptureArea"/> is
+    /// wired). Attaching to the control directly (rather than the
+    /// view) keeps the same contract the headless tests use.
     /// </summary>
     public void Attach(SignaturePadControl control)
     {

src/PostIt/PostIt/Views/Activity/BillingQueryDetailsPage.axaml

@@ -14,7 +14,7 @@
             <TextBlock Text="{Binding ContextLabel}" Opacity="0.75" />
         </StackPanel>
 
-        <Grid Grid.Row="1" Margin="0,10,0,0" ColumnDefinitions="Auto,8,Auto,*">
+        <Grid Grid.Row="1" Margin="0,10,0,0" ColumnDefinitions="Auto,8,Auto,8,Auto,8,Auto,*">
             <Button Grid.Column="0"
                     Content="Retour"
                     Command="{Binding BackCommand}" />
@@ -22,6 +22,12 @@
                     Content="Ouvrir en edition"
                     Command="{Binding OpenEditorCommand}"
                     IsVisible="{Binding CanEdit}" />
+            <Button Grid.Column="4"
+                    Content="Télécharger PDF"
+                    Command="{Binding DownloadPdfCommand}" />
+            <Button Grid.Column="6"
+                    Content="Télécharger TeX"
+                    Command="{Binding DownloadTexCommand}" />
         </Grid>
 
         <ScrollViewer Grid.Row="2" Margin="0,12,0,12">

src/PostIt/PostIt/Views/Activity/EstimateListPage.axaml

@@ -29,34 +29,40 @@
                             CornerRadius="8"
                             Padding="10"
                             Margin="0,0,0,8">
-                        <Grid RowDefinitions="Auto,Auto" ColumnDefinitions="*,Auto">
-                            <TextBlock Grid.Row="0"
-                                       Grid.Column="0"
-                                       Text="{Binding Title}"
-                                       FontWeight="Bold"
-                                       TextWrapping="Wrap" />
-                            <TextBlock Grid.Row="0"
-                                       Grid.Column="1"
-                                       Text="{Binding Id}"
-                                       FontSize="11"
-                                       Opacity="0.75"
-                                       HorizontalAlignment="Right" />
+                        <StackPanel Spacing="8">
+                            <Grid RowDefinitions="Auto,Auto" ColumnDefinitions="*,Auto">
+                                <TextBlock Grid.Row="0"
+                                           Grid.Column="0"
+                                           Text="{Binding Title}"
+                                           FontWeight="Bold"
+                                           TextWrapping="Wrap" />
+                                <TextBlock Grid.Row="0"
+                                           Grid.Column="1"
+                                           Text="{Binding Id}"
+                                           FontSize="11"
+                                           Opacity="0.75"
+                                           HorizontalAlignment="Right" />
 
-                            <TextBlock Grid.Row="1"
-                                       Grid.Column="0"
-                                       Margin="0,6,0,0"
-                                       Text="{Binding Description}"
-                                       FontSize="11"
-                                       Opacity="0.75"
-                                       TextWrapping="Wrap" />
-                            <TextBlock Grid.Row="1"
-                                       Grid.Column="1"
-                                       Margin="0,6,0,0"
-                                       Text="{Binding Bill.Count}"
-                                       FontSize="11"
-                                       Opacity="0.65"
-                                       HorizontalAlignment="Right" />
-                        </Grid>
+                                <TextBlock Grid.Row="1"
+                                           Grid.Column="0"
+                                           Margin="0,6,0,0"
+                                           Text="{Binding Description}"
+                                           FontSize="11"
+                                           Opacity="0.75"
+                                           TextWrapping="Wrap" />
+                                <TextBlock Grid.Row="1"
+                                           Grid.Column="1"
+                                           Margin="0,6,0,0"
+                                           Text="{Binding Bill.Count}"
+                                           FontSize="11"
+                                           Opacity="0.65"
+                                           HorizontalAlignment="Right" />
+                            </Grid>
+                            <Button Content="Ouvrir"
+                                    HorizontalAlignment="Right"
+                                    Command="{Binding $parent[ContentPage].((vm:EstimateListPageViewModel)DataContext).OpenEstimateCommand}"
+                                    CommandParameter="{Binding}" />
+                        </StackPanel>
                     </Border>
                 </DataTemplate>
             </ListBox.ItemTemplate>

src/PostIt/PostIt/Views/Activity/EstimateListPage.axaml.cs

@@ -1,5 +1,6 @@
 using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
+using PostIt.ViewModels;
 
 namespace PostIt.Views;
 
@@ -14,4 +15,19 @@ public partial class EstimateListPage : ContentPage
     {
         AvaloniaXamlLoader.Load(this);
     }
+
+    // Re-fetch the list when returning to it (e.g. after validating an
+    // estimate on the validation page). Avalonia's Page.OnNavigatedTo
+    // fires on the page popped back to with NavigationType.Pop; the list
+    // VM is retained on the nav stack while away, so this refresh picks
+    // up the server-side filter change that removed the signed estimate.
+    protected override void OnNavigatedTo(NavigatedToEventArgs e)
+    {
+        base.OnNavigatedTo(e);
+        if (e.NavigationType == NavigationType.Pop
+            && DataContext is EstimateListPageViewModel vm)
+        {
+            _ = vm.RefreshAsync();
+        }
+    }
 }

src/PostIt/PostIt/Views/Activity/EstimateValidationPage.axaml

@@ -0,0 +1,146 @@
+<ContentPage xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             xmlns:controls="using:PostIt.Controls"
+             xmlns:dto="using:Yavsc.Api.Client"
+             xmlns:postitControls="using:PostIt.Controls"
+             x:Class="PostIt.Views.EstimateValidationPage"
+             x:DataType="vm:EstimateValidationPageViewModel"
+             Header="Validation du devis">
+    <Grid RowDefinitions="Auto,*,Auto" Margin="12">
+        <StackPanel Grid.Row="0" Spacing="3" Margin="0,0,0,8">
+            <TextBlock Text="{Binding Title}"
+                       FontSize="20"
+                       FontWeight="Bold"
+                       TextWrapping="Wrap" />
+            <TextBlock Text="{Binding RoleLabel}" Opacity="0.75" />
+            <TextBlock Text="{Binding ValidationStateText}"
+                       FontSize="11"
+                       Opacity="0.75"
+                       TextWrapping="Wrap" />
+        </StackPanel>
+
+        <ScrollViewer Grid.Row="1">
+            <StackPanel Spacing="10">
+                <Border BorderThickness="1"
+                        BorderBrush="#22000000"
+                        CornerRadius="8"
+                        Padding="10">
+                    <StackPanel Spacing="6">
+                        <Grid ColumnDefinitions="Auto,12,*">
+                            <TextBlock Grid.Column="0"
+                                       Text="N°"
+                                       FontWeight="SemiBold" />
+                            <TextBlock Grid.Column="2"
+                                       Text="{Binding EstimateId}" />
+                        </Grid>
+                        <Grid ColumnDefinitions="Auto,12,*">
+                            <TextBlock Grid.Column="0"
+                                       Text="Type"
+                                       FontWeight="SemiBold" />
+                            <TextBlock Grid.Column="2"
+                                       Text="{Binding CommandType}" />
+                        </Grid>
+                        <TextBlock Text="{Binding Description}"
+                                   TextWrapping="Wrap"
+                                   Opacity="0.85" />
+                    </StackPanel>
+                </Border>
+
+                <Border BorderThickness="1"
+                        BorderBrush="#22000000"
+                        CornerRadius="8"
+                        Padding="10">
+                    <StackPanel Spacing="8">
+                        <TextBlock Text="Lignes du devis" FontWeight="SemiBold" />
+                        <ItemsControl ItemsSource="{Binding Bill}">
+                            <ItemsControl.ItemTemplate>
+                                <DataTemplate x:DataType="dto:EstimateLineDto">
+                                    <Grid ColumnDefinitions="*,8,60,8,120" Margin="0,0,0,4">
+                                        <TextBlock Grid.Column="0"
+                                                   Text="{Binding Name}"
+                                                   TextWrapping="Wrap" />
+                                        <TextBlock Grid.Column="2"
+                                                   Text="{Binding Count}"
+                                                   HorizontalAlignment="Right" />
+                                        <StackPanel Grid.Column="4"
+                                                    Orientation="Horizontal"
+                                                    HorizontalAlignment="Right"
+                                                    Spacing="4">
+                                            <TextBlock Text="{Binding UnitaryCost, StringFormat='{}{0:N2}'}" />
+                                            <TextBlock Text="{Binding Currency}" Opacity="0.7" />
+                                        </StackPanel>
+                                    </Grid>
+                                </DataTemplate>
+                            </ItemsControl.ItemTemplate>
+                        </ItemsControl>
+                    </StackPanel>
+                </Border>
+
+                <Border BorderThickness="1"
+                        BorderBrush="#22000000"
+                        CornerRadius="8"
+                        Padding="10">
+                    <StackPanel Spacing="8">
+                        <TextBlock Text="Signature du prestataire" FontWeight="SemiBold" />
+                        <TextBlock Text="{Binding ProSignatureHint}"
+                                   FontSize="11"
+                                   Opacity="0.7" />
+                        <controls:SignaturePadView x:Name="ProPad"
+                                                   CaptureWidth="560"
+                                                   CaptureHeight="160" />
+                    </StackPanel>
+                </Border>
+
+                <Border BorderThickness="1"
+                        BorderBrush="#22000000"
+                        CornerRadius="8"
+                        Padding="10">
+                    <StackPanel Spacing="8">
+                        <TextBlock Text="Signature du client" FontWeight="SemiBold" />
+                        <TextBlock Text="{Binding ClientSignatureHint}"
+                                   FontSize="11"
+                                   Opacity="0.7" />
+                        <controls:SignaturePadView x:Name="ClientPad"
+                                                   CaptureWidth="560"
+                                                   CaptureHeight="160" />
+                    </StackPanel>
+                </Border>
+
+                <TextBlock FontSize="11"
+                           Foreground="DarkSlateGray">
+                    <Run Text="Votre signature : traits " />
+                    <Run Text="{Binding StrokeCount, Mode=OneWay}" />
+                    <Run Text=" · points " />
+                    <Run Text="{Binding PointCount, Mode=OneWay}" />
+                </TextBlock>
+            </StackPanel>
+        </ScrollViewer>
+
+        <Grid Grid.Row="2" ColumnDefinitions="Auto,*,Auto" Margin="0,12,0,0">
+            <StackPanel Grid.Column="0" Orientation="Horizontal" Spacing="8">
+                <Button Content="Effacer"
+                        Command="{Binding ClearSignatureCommand}" />
+                <Button Content="Valider"
+                        Command="{Binding ValidateCommand}" />
+                <Button Content="Refuser"
+                        Command="{Binding RejectCommand}" />
+                <Button Content="Télécharger PDF"
+                        Command="{Binding DownloadPdfCommand}" />
+                <Button Content="Télécharger TeX"
+                        Command="{Binding DownloadTexCommand}" />
+                <Button Content="Retour"
+                        Command="{Binding BackCommand}" />
+            </StackPanel>
+            <StackPanel Grid.Column="2"
+                        Orientation="Horizontal"
+                        Spacing="8"
+                        VerticalAlignment="Center">
+                <ProgressBar Width="120"
+                             IsIndeterminate="True"
+                             IsVisible="{Binding IsBusy}" />
+                <postitControls:StatusBar DataContext="{Binding ActionStatus}" />
+            </StackPanel>
+        </Grid>
+    </Grid>
+</ContentPage>

src/PostIt/PostIt/Views/Activity/EstimateValidationPage.axaml.cs

@@ -0,0 +1,32 @@
+using Avalonia.Controls;
+using PostIt.Controls;
+using PostIt.ViewModels;
+
+namespace PostIt.Views;
+
+public partial class EstimateValidationPage : ContentPage
+{
+    private EstimateValidationPageViewModel? _vm;
+
+    public EstimateValidationPage()
+    {
+        InitializeComponent();
+
+        DataContextChanged += (_, _) => RebindViewModel(DataContext as EstimateValidationPageViewModel);
+        Unloaded += (_, _) => _vm?.Detach();
+    }
+
+    private void RebindViewModel(EstimateValidationPageViewModel? vm)
+    {
+        if (_vm is not null)
+        {
+            _vm.Detach();
+        }
+
+        _vm = vm;
+
+        if (_vm is null || ProPad is null || ClientPad is null) return;
+
+        _vm.Attach(ProPad.SignaturePad, ClientPad.SignaturePad);
+    }
+}

src/PostIt/PostIt/Views/Layout/HomePage.axaml

@@ -26,11 +26,11 @@
               Command="{Binding OpenProviderRequests}"
               HorizontalAlignment="Center"
               IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>
-          <Button Content="Mes devis à valider"
+          <Button Content="Devis en attente de signature client"
               Command="{Binding OpenClientEstimates}"
               HorizontalAlignment="Center"
               IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>
-          <Button Content="Mes devis en attente"
+          <Button Content="Devis en attente de signature fournisseur"
               Command="{Binding OpenProviderEstimates}"
               HorizontalAlignment="Center"
               IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>

src/PostIt/PostIt/Views/Signature/SignaturePage.axaml

@@ -29,29 +29,15 @@
                    FontWeight="Bold" />
 
         <!--
-            Capture surface. The SignaturePadControl is render-
-            agnostic, so we host it inside a fixed-size Border
-            that is the PART_CaptureArea, and overlay a Canvas
-            for the visual feedback. The view's code-behind
-            repaints the canvas on every RedrawRequested.
+            Capture surface. SignaturePadView owns the SignaturePadControl,
+            the capture-area Border, the ink overlay canvas, and the
+            repaint logic; the page just sizes it from the VM and reads
+            the captured data through the view's API.
         -->
-        <Border Grid.Row="1"
-                x:Name="PadFrame"
-                Width="{Binding Width}"
-                Height="{Binding Height}"
-                BorderBrush="Black"
-                BorderThickness="1"
-                Background="White"
-                HorizontalAlignment="Left"
-                VerticalAlignment="Top"
-                ClipToBounds="True">
-            <Grid>
-                <controls:SignaturePadControl x:Name="Pad" />
-                <Canvas x:Name="InkLayer"
-                        Background="Transparent"
-                        IsHitTestVisible="False" />
-            </Grid>
-        </Border>
+        <controls:SignaturePadView Grid.Row="1"
+                                   x:Name="Pad"
+                                   CaptureWidth="{Binding Width}"
+                                   CaptureHeight="{Binding Height}" />
 
         <StackPanel Grid.Row="2"
                     Orientation="Horizontal"

src/PostIt/PostIt/Views/Signature/SignaturePage.axaml.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Controls.Shapes;
-using Avalonia.Media;
 using PostIt.Controls;
 using PostIt.ViewModels;
 
@@ -11,26 +6,15 @@ namespace PostIt.Views;
 
 public partial class SignaturePage : ContentPage
 {
-    private static readonly IBrush StrokeBrush = new SolidColorBrush(Color.FromRgb(0x10, 0x10, 0x10));
-    private const double StrokeThickness = 2.0;
-    private const double CoordinateMax = 10_000.0;
-
     private SignaturePageViewModel? _vm;
-    private SignaturePadControl? _control;
 
     public SignaturePage()
     {
         InitializeComponent();
 
-        // Wire the capture area: the Pad itself is the control, the
-        // surrounding Border (PadFrame) is the hit-test region. We
-        // set CaptureArea once the control's template has been
-        // applied — for an inline control with no template, that
-        // happens on first measure, which is guaranteed before
-        // the user can interact, so attaching here is safe.
-        _control = Pad;
-        _control.CaptureArea = PadFrame;
-
+        // SignaturePadView owns the capture area wiring and the ink
+        // repaint; the page only forwards the view to the VM so it can
+        // read snapshots / subscribe to stroke events.
         DataContextChanged += (_, _) => RebindViewModel(DataContext as SignaturePageViewModel);
     }
 
@@ -39,82 +23,12 @@ public partial class SignaturePage : ContentPage
         if (_vm is not null)
         {
             _vm.Detach();
-            _control!.RedrawRequested -= OnRedrawRequested;
         }
 
         _vm = vm;
 
-        if (_vm is null || _control is null) return;
+        if (_vm is null || Pad is null) return;
 
-        _vm.Attach(_control);
-        _control.RedrawRequested += OnRedrawRequested;
-        Repaint();
+        _vm.Attach(Pad.SignaturePad);
     }
-
-    private void OnRedrawRequested(object? sender, EventArgs e) => Repaint();
-
-    private void Repaint()
-    {
-        if (_control is null || InkLayer is null) return;
-
-        InkLayer.Children.Clear();
-        var w = PadFrame.Bounds.Width;
-        var h = PadFrame.Bounds.Height;
-        if (w <= 0 || h <= 0) return;
-
-        var pending = _control.PendingStroke;
-        var strokes = _control.Strokes;
-        int sealedCount = strokes.Count - pending.Count;
-        if (sealedCount < 0)
-        {
-            sealedCount = 0;
-        }
-
-        int i = 0;
-        while (i < sealedCount)
-        {
-            int k = strokes[i];
-            if (k <= 0) break;
-            i++; // skip the length prefix
-
-            var poly = new Polyline
-            {
-                Stroke = StrokeBrush,
-                StrokeThickness = StrokeThickness,
-                StrokeLineCap = PenLineCap.Round,
-                StrokeJoin = PenLineJoin.Round,
-            };
-            var pts = new List<Point>(k);
-            for (int p = 0; p < k; p++)
-            {
-                int nx = strokes[i++];
-                int ny = strokes[i++];
-                pts.Add(new Point(nx / CoordinateMax * w, ny / CoordinateMax * h));
-            }
-            poly.Points = pts;
-            InkLayer.Children.Add(poly);
-        }
-
-        if (pending.Count > 0)
-        {
-            var poly = new Polyline
-            {
-                Stroke = StrokeBrush,
-                StrokeThickness = StrokeThickness,
-                StrokeLineCap = PenLineCap.Round,
-                StrokeJoin = PenLineJoin.Round,
-            };
-
-            var pts = new List<Point>(pending.Count / 2);
-            for (int p = 0; p < pending.Count; p += 2)
-            {
-                int nx = pending[p];
-                int ny = pending[p + 1];
-                pts.Add(new Point(nx / CoordinateMax * w, ny / CoordinateMax * h));
-            }
-
-            poly.Points = pts;
-            InkLayer.Children.Add(poly);
-        }
-    }
-}
+}

src/Yavsc.Abstract/Billing/SignatureType.cs

@@ -12,4 +12,4 @@ public enum SignatureType
 {
     Pro = 0,
     Client = 1,
-}
+}

src/Yavsc.Abstract/Workflow/QueryStatus.cs

@@ -5,15 +5,28 @@ namespace Yavsc
      /// should be associated to any
     /// client user query to a provider user or
     /// other external entity.
+    ///
+    /// <para>
+    /// Acceptance is split by party: <see cref="ProAccepted"/> when the
+    /// provider accepts the client's request (and produces/submits the
+    /// estimate), <see cref="ClientAccepted"/> when the client accepts
+    /// the provider's estimate. <see cref="Accepted"/> is the legacy
+    /// single-value kept for rows written before the split; new writes
+    /// use the party-specific values. Its integer value (2) is stable
+    /// so existing rows still deserialize.
+    /// </para>
     /// </summary>
     public enum QueryStatus: int
     {
-        Inserted,
-        Rejected,
-        Accepted,
-        InProgress,
+        Inserted = 0,
+        Rejected = 1,
+        Accepted = 2,
+        InProgress = 3,
         // final states
-        Failed,
-        Success
+        Failed = 4,
+        Success = 5,
+        // party-specific acceptance (see summary)
+        ProAccepted = 6,
+        ClientAccepted = 7,
     }
-}
+}

src/Yavsc.Abstract/Yavsc.Abstract.csproj

@@ -11,7 +11,7 @@
     <LangVersion>latest</LangVersion>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
 </Project>

src/Yavsc.Api.Client/Dtos/EstimateDtos.cs

@@ -39,6 +39,39 @@ public sealed class EstimateDto
     public string CommandType { get; set; } = string.Empty;
     public DateTime ProviderValidationDate { get; set; }
     public DateTime ClientValidationDate { get; set; }
+
+    /// <summary>
+    /// The provider's signature on this estimate, or null when the
+    /// provider has not signed. Carries the PostIt wire-format
+    /// <see cref="EstimateSignatureDto.Strokes"/> so the pad can
+    /// repaint a previously drawn signature on reopen without a second
+    /// round-trip.
+    /// </summary>
+    public EstimateSignatureDto? SignaturePro { get; set; }
+
+    /// <summary>
+    /// The client's signature on this estimate, or null when the
+    /// client has not signed.
+    /// </summary>
+    public EstimateSignatureDto? SignatureClient { get; set; }
+}
+
+/// <summary>
+/// One stored signature on an estimate, mirroring the JSON shape of
+/// the server-side <c>Yavsc.Models.Billing.Signature</c> entity. The
+/// <see cref="Strokes"/> are the same PostIt wire-format payload that
+/// was captured and are loaded back into the pad unchanged. The side
+/// (Pro/Client) is implicit in which property of
+/// <see cref="EstimateDto"/> carries this DTO, so no <c>Type</c>
+/// field is needed.
+/// </summary>
+public sealed class EstimateSignatureDto
+{
+    public long Id { get; set; }
+    public long EstimateId { get; set; }
+    public int CoordinateMax { get; set; }
+    public DateTime CapturedAtUtc { get; set; }
+    public int[]? Strokes { get; set; }
 }
 
 /// <summary>

src/Yavsc.Api.Client/Dtos/QueryAcceptanceDto.cs

@@ -0,0 +1,56 @@
+using System;
+using Yavsc.Models.Billing;
+
+namespace Yavsc.Api.Client;
+
+/// <summary>
+/// Body of <c>POST api/v1/front/query/accept</c> and
+/// <c>.../query/reject</c>, mirroring the server-side
+/// <c>Yavsc.ViewModels.FrontOffice.QueryAcceptanceRequest</c>.
+/// <see cref="Strokes"/> is optional: when non-empty on accept it is
+/// the PostIt wire-format signature captured with the acceptance; null
+/// or empty means no signature (the only valid value on reject).
+/// </summary>
+public sealed class QueryAcceptanceRequestDto
+{
+    public int[]? Strokes { get; set; }
+
+    public int CoordinateMax { get; set; } = 10_000;
+
+    public DateTime? CapturedAtUtc { get; set; }
+
+    /// <summary>
+    /// Which signature is being submitted:
+    /// <see cref="SignatureType.Pro"/> (the provider) or
+    /// <see cref="SignatureType.Client"/>. The PostIt client sets this
+    /// from the perspective the page was opened in (provider signs Pro,
+    /// client signs Client), so the server stores the signature under
+    /// the right author even when one user is both parties. Null lets
+    /// the server infer the role from the caller's identity.
+    /// </summary>
+    public SignatureType? SignatureType { get; set; }
+}
+
+/// <summary>
+/// Response of <c>POST .../query/accept</c> / <c>.../query/reject</c>
+/// (<c>Ok(new { queryId, status, signature = ... })</c>). The
+/// <see cref="Signature"/> ref is non-null only when a signature was
+/// staged on accept.
+/// </summary>
+public sealed class QueryAcceptanceResponseDto
+{
+    public long QueryId { get; set; }
+
+    public string? Status { get; set; }
+
+    public QuerySignatureRefDto? Signature { get; set; }
+}
+
+public sealed class QuerySignatureRefDto
+{
+    public long Id { get; set; }
+
+    public long EstimateId { get; set; }
+
+    public string? Type { get; set; }
+}

src/Yavsc.Api.Client/FrontOfficeApiClient.cs

@@ -0,0 +1,135 @@
+using System;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Yavsc.Api.Client;
+
+/// <summary>
+/// HTTP client for the front-office query routes
+/// (<c>api/v1/front/query/accept</c> / <c>.../reject</c>, served by
+/// <see cref="Yavsc.ApiControllers.FrontOfficeApiController"/>). Same
+/// DTO↔path mapper shape as <see cref="EstimateApiClient"/>: transport
+/// (base URL, JSON, Bearer auth, silent refresh on 401) is delegated
+/// to <see cref="IYavscApiClient"/>.
+///
+/// The server resolves the caller's role (provider vs client vs admin)
+/// from the authenticated user compared to the query's
+/// <c>PerformerId</c>/<c>ClientId</c>; the client does not declare a
+/// role. <paramref name="billingCode"/> is the estimate's
+/// <see cref="EstimateDto.CommandType"/> and <paramref name="queryId"/>
+/// is its <see cref="EstimateDto.CommandId"/>.
+/// </summary>
+public sealed class FrontOfficeApiClient
+{
+    private const string PathPrefix = "front";
+
+    private readonly IYavscApiClient _api;
+    private readonly Func<string> _businessBaseAddress;
+
+    public FrontOfficeApiClient(IYavscApiClient api, string businessBaseAddress)
+        : this(api, () => businessBaseAddress)
+    {
+    }
+
+    public FrontOfficeApiClient(IYavscApiClient api, Func<string> businessBaseAddress)
+    {
+        _api = api ?? throw new ArgumentNullException(nameof(api));
+        _businessBaseAddress = businessBaseAddress ?? throw new ArgumentNullException(nameof(businessBaseAddress));
+        _ = ResolveBusinessBaseAddress();
+    }
+
+    /// <summary>
+    /// Accept (validate) the query <paramref name="queryId"/> under
+    /// billing code <paramref name="billingCode"/>. When
+    /// <paramref name="body"/> carries a non-empty signature, the
+    /// server stages it on the query's linked estimate and stamps the
+    /// matching validation date.
+    /// </summary>
+    public async Task<QueryAcceptanceResponseDto> AcceptQueryAsync(
+        string billingCode,
+        long queryId,
+        QueryAcceptanceRequestDto body,
+        CancellationToken ct = default)
+    {
+        if (string.IsNullOrWhiteSpace(billingCode))
+            throw new ArgumentException("billingCode is required.", nameof(billingCode));
+        if (queryId <= 0)
+            throw new ArgumentOutOfRangeException(nameof(queryId));
+        if (body is null)
+            throw new ArgumentNullException(nameof(body));
+
+        var path = $"{PathPrefix}/query/accept?billingCode={Uri.EscapeDataString(billingCode)}&queryId={queryId}";
+        var response = await _api.CallAsync<QueryAcceptanceResponseDto>(
+            HttpMethod.Post,
+            Absolute(path),
+            body: body,
+            ct: ct).ConfigureAwait(false);
+
+        return response ?? new QueryAcceptanceResponseDto { QueryId = queryId };
+    }
+
+    /// <summary>
+    /// Reject the query <paramref name="queryId"/> under billing code
+    /// <paramref name="billingCode"/>. A signature is not meaningful on
+    /// a rejection; the server refuses one with 400, so this sends no
+    /// body.
+    /// </summary>
+    public async Task<QueryAcceptanceResponseDto> RejectQueryAsync(
+        string billingCode,
+        long queryId,
+        CancellationToken ct = default)
+    {
+        if (string.IsNullOrWhiteSpace(billingCode))
+            throw new ArgumentException("billingCode is required.", nameof(billingCode));
+        if (queryId <= 0)
+            throw new ArgumentOutOfRangeException(nameof(queryId));
+
+        var path = $"{PathPrefix}/query/reject?billingCode={Uri.EscapeDataString(billingCode)}&queryId={queryId}";
+        var response = await _api.CallAsync<QueryAcceptanceResponseDto>(
+            HttpMethod.Post,
+            Absolute(path),
+            body: null,
+            ct: ct).ConfigureAwait(false);
+
+        return response ?? new QueryAcceptanceResponseDto { QueryId = queryId };
+    }
+
+    /// <summary>
+    /// Download the estimate linked to query <paramref name="queryId"/>
+    /// as a LaTeX (<c>.tex</c>) source document
+    /// (<c>GET api/v1/front/query/{queryId}/estimate.tex</c>). Returns
+    /// the raw TeX bytes (UTF-8 text).
+    /// </summary>
+    public Task<byte[]> GetEstimateTexAsync(long queryId, CancellationToken ct = default)
+    {
+        if (queryId <= 0) throw new ArgumentOutOfRangeException(nameof(queryId));
+        var path = $"{PathPrefix}/query/{queryId}/estimate.tex";
+        return _api.DownloadAsync(HttpMethod.Get, Absolute(path), ct);
+    }
+
+    /// <summary>
+    /// Download the estimate linked to query <paramref name="queryId"/>
+    /// as a compiled PDF document
+    /// (<c>GET api/v1/front/query/{queryId}/estimate.pdf</c>). Returns
+    /// the raw PDF bytes. Requires <c>texi2pdf</c> on the server host;
+    /// a non-2xx response throws <see cref="HttpRequestException"/>.
+    /// </summary>
+    public Task<byte[]> GetEstimatePdfAsync(long queryId, CancellationToken ct = default)
+    {
+        if (queryId <= 0) throw new ArgumentOutOfRangeException(nameof(queryId));
+        var path = $"{PathPrefix}/query/{queryId}/estimate.pdf";
+        return _api.DownloadAsync(HttpMethod.Get, Absolute(path), ct);
+    }
+
+    private string Absolute(string relativePath) => new Uri(ResolveBusinessBaseAddress(), relativePath).ToString();
+
+    private Uri ResolveBusinessBaseAddress()
+    {
+        var raw = _businessBaseAddress();
+        if (string.IsNullOrWhiteSpace(raw))
+            throw new InvalidOperationException("Business base address is required.");
+
+        return new Uri(raw, UriKind.Absolute);
+    }
+}

src/Yavsc.Api.Client/IYavscApiClient.cs

@@ -73,4 +73,23 @@ public interface IYavscApiClient : IAsyncDisposable
         string path,
         Func<HttpContent> contentFactory,
         CancellationToken ct = default);
+
+    /// <summary>
+    /// Download a binary resource (PDF, TeX, image, …). Unlike
+    /// <see cref="CallAsync{T}(HttpMethod,string,object?,CancellationToken)"/>,
+    /// which JSON-decodes the response, this returns the raw response
+    /// bytes. The same Bearer-token attach + 401-refresh-retry-once
+    /// contract applies.
+    /// </summary>
+    /// <remarks>
+    /// A default interface implementation is provided so that test
+    /// fakes that do not exercise binary download still compile without
+    /// declaring the member; the real <see cref="YavscApiClient"/>
+    /// overrides it with the authenticated transport.
+    /// </remarks>
+    Task<byte[]> DownloadAsync(
+        HttpMethod method,
+        string path,
+        CancellationToken ct = default)
+        => Task.FromResult(Array.Empty<byte>());
 }

src/Yavsc.Api.Client/Yavsc.Api.Client.csproj

@@ -17,8 +17,8 @@
     <Library>true</Library>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <ProjectReference Include="../Yavsc.Abstract/Yavsc.Abstract.csproj" />

src/Yavsc.Api.Test/EstimateApiControllerTests.cs

@@ -284,11 +284,14 @@ public sealed class EstimateApiControllerTests : IClassFixture<ApiWebServerFixtu
     }
 
     [Fact]
-    public async Task GetOngoingEstimatesAsProvider_returns_only_ongoing_estimates_established_by_the_provider()
+    public async Task GetOngoingEstimatesAsProvider_returns_estimates_the_provider_has_not_yet_signed()
     {
         _fixture.ResetAndSeedActivityGraph();
-        var ongoingId = SeedEstimate(clientId: "bob", clientValidated: false);
-        SeedEstimate(clientId: "bob", clientValidated: true); // already validated: excluded
+        // Not yet provider-signed: visible in the provider's "awaiting
+        // provider signature" list.
+        var pendingId = SeedEstimate(clientId: "bob", clientValidated: false, providerValidated: false);
+        // Provider already signed: must leave the list immediately.
+        SeedEstimate(clientId: "bob", clientValidated: false, providerValidated: true);
 
         using var http = NewClient("alice");
 
@@ -300,7 +303,7 @@ public sealed class EstimateApiControllerTests : IClassFixture<ApiWebServerFixtu
         using var doc = JsonDocument.Parse(body);
         var items = doc.RootElement.EnumerateArray().ToArray();
         var item = Assert.Single(items);
-        Assert.Equal(ongoingId, item.GetProperty("id").GetInt64());
+        Assert.Equal(pendingId, item.GetProperty("id").GetInt64());
         Assert.Equal("alice", item.GetProperty("ownerId").GetString());
         Assert.Single(item.GetProperty("bill").EnumerateArray());
     }

src/Yavsc.Api.Test/EstimatePdfGenerationTests.cs

@@ -0,0 +1,191 @@
+using System.Diagnostics;
+using System.Globalization;
+using System.IO;
+using System.Reflection;
+using Yavsc.Helpers;
+using Yavsc.Models.Billing;
+using Yavsc.ViewModels.Gen;
+
+namespace Yavsc.Api.Test;
+
+// Unit test of the estimate PDF generation pipeline (no HTTP fixture
+// needed): it exercises TeXHelpers.SignatureToTikz — the vector drawing
+// of the provider and client signatures — and TeXHelpers.GenerateEstimatePdf
+// — the lualatex stdin compile that writes <name>.pdf into DestDir. The
+// TeX source mirrors what the Estimate_tex template emits for a devis
+// signed by both parties: two side-by-side minipages, each with a
+// tikzpicture bounded by \useasboundingbox and the strokes drawn by
+// SignatureToTikz.
+//
+// The PDF test requires the system `lualatex` (and the TeX Live packages
+// listed in the README runtime-deps section) on the host running the
+// tests. On hosts without lualatex it skips cleanly rather than failing.
+public sealed class EstimatePdfGenerationTests
+{
+    // A provider signature: a downstroke, a cross, and a tap (dot).
+    // PostIt wire format — [k, x0,y0, x1,y1, …] per stroke, coords in
+    // [0, 10000], y-down.
+    private static readonly int[] ProStrokes =
+    {
+        4, 2000, 8000, 2000, 5000, 2000, 2000, 2100, 1900,
+        3, 2000, 5000, 3500, 4500, 3500, 5100,
+        1, 4000, 3000,
+    };
+
+    // A client signature: a wavy stroke and a shorter one.
+    private static readonly int[] CliStrokes =
+    {
+        5, 1000, 7000, 1500, 4000, 2200, 3000, 3000, 2500, 4000, 1500,
+        2, 3000, 6000, 4200, 5500,
+    };
+
+    [Fact]
+    public void SignatureToTikz_RendersBothSignaturesAsVectorDraws()
+    {
+        var pro = MakeSig(SignatureType.Pro, ProStrokes);
+        var cli = MakeSig(SignatureType.Client, CliStrokes);
+
+        var proTex = pro.SignatureToTikz(5, 2.5).ToString();
+        var cliTex = cli.SignatureToTikz(5, 2.5).ToString();
+
+        Assert.Contains("\\draw[line cap=round, line join=round, line width=1.5pt]", proTex);
+        Assert.Contains("\\fill", proTex);            // the single-point tap → dot
+        Assert.Contains("(1.000,0.500)", proTex);    // first point (2000,8000), y flipped
+        Assert.Contains("\\draw[line cap=round, line join=round, line width=1.5pt]", cliTex);
+        Assert.Contains("--", cliTex);
+    }
+
+    [Fact]
+    public void SignatureToTikz_EmptySignatureIsEmpty()
+    {
+        var empty = MakeSig(SignatureType.Pro, Array.Empty<int>());
+        Assert.Equal("", empty.SignatureToTikz(5, 2.5).ToString());
+    }
+
+    [Fact]
+    public void GenerateEstimatePdf_WithBothSignatures_ProducesPdfInDestDir()
+    {
+        if (!IsLualatexAvailable())
+            throw Xunit.Sdk.SkipException.ForSkip(
+                "lualatex is not installed on this host; skipping PDF generation test. " +
+                "Install the TeX Live runtime deps documented in the README.");
+
+        var destDir = Path.Combine(Path.GetTempPath(),
+            "yavsc-estimate-pdf-" + Guid.NewGuid().ToString("N"));
+        Directory.CreateDirectory(destDir);
+
+        try
+        {
+            var pro = MakeSig(SignatureType.Pro, ProStrokes);
+            var cli = MakeSig(SignatureType.Client, CliStrokes);
+            var baseName = "estimate-test-both-signed";
+
+            var model = new PdfGenerationViewModel
+            {
+                TeXSource = BuildEstimateTeX(pro, cli),
+                BaseFileName = baseName,
+                DestDir = destDir,
+            };
+
+            var fo = model.GenerateEstimatePdf();
+
+            // The PDF must exist, at the expected path, and be non-empty.
+            var expectedPath = Path.Combine(destDir, baseName + ".pdf");
+            Assert.True(fo is not null && fo.Exists,
+                "GenerateEstimatePdf returned a non-existent file. Error: "
+                + model.GenerationErrorMessage?.Value);
+            Assert.Equal(expectedPath, fo.FullName);
+            Assert.True(fo.Length > 0, "generated PDF is empty");
+
+            // Only the PDF should persist in DestDir — aux/log artifacts
+            // are cleaned up by GenerateEstimatePdf on success.
+            var leftovers = Directory.GetFiles(destDir)
+                .Where(p => !Path.GetFileName(p).Equals(baseName + ".pdf", StringComparison.Ordinal))
+                .ToArray();
+            Assert.Empty(leftovers);
+        }
+        finally
+        {
+            if (Directory.Exists(destDir))
+                Directory.Delete(destDir, recursive: true);
+        }
+    }
+
+    private static Signature MakeSig(SignatureType type, int[] strokes)
+        => new()
+        {
+            Type = type,
+            CoordinateMax = 10_000,
+            Strokes = strokes,
+            CapturedAtUtc = new DateTime(2026, 9, 22, 0, 0, 0, DateTimeKind.Utc),
+        };
+
+    // Builds the LaTeX source the Estimate_tex template would emit for a
+    // devis signed by both parties: same preamble (incl. tikz + bera) and
+    // the two-minipage signature foot, with the strokes drawn by
+    // SignatureToTikz.
+    private static string BuildEstimateTeX(Signature pro, Signature cli)
+    {
+        var fr = CultureInfo.CreateSpecificCulture("fr-FR");
+        var date = new DateTime(2026, 9, 22).ToString("dddd dd MMMM yyyy", fr);
+        var proTikz = pro.SignatureToTikz(5, 2.5).ToString();
+        var cliTikz = cli.SignatureToTikz(5, 2.5).ToString();
+
+        return $@"\documentclass[french,11pt]{{article}}
+\usepackage{{eurosym}}
+\usepackage{{babel}}
+\usepackage[T1]{{fontenc}}
+\usepackage[utf8]{{inputenc}}
+\usepackage[a4paper]{{geometry}}
+\usepackage{{units}}
+\usepackage{{bera}}
+\usepackage{{graphicx}}
+\usepackage{{fancyhdr}}
+\usepackage{{fp}}
+\usepackage{{tikz}}
+\geometry{{verbose,tmargin=4em,bmargin=8em,lmargin=6em,rmargin=6em}}
+\setlength{{\parindent}}{{0pt}}
+\begin{{document}}
+Devis n°1 --- test signe par les deux parties
+
+\vspace{{2em}}
+\noindent
+\begin{{minipage}}[t]{{0.45\textwidth}}
+  \textbf{{Signature du fournisseur}}\\
+\small Valide le {date}\\
+\begin{{tikzpicture}}
+  \useasboundingbox (0,0) rectangle (5,2.5);
+  {proTikz}
+\end{{tikzpicture}}
+\end{{minipage}}\hfill
+\begin{{minipage}}[t]{{0.45\textwidth}}
+  \textbf{{Signature du client}}\\
+\small Valide le {date}\\
+\begin{{tikzpicture}}
+  \useasboundingbox (0,0) rectangle (5,2.5);
+  {cliTikz}
+\end{{tikzpicture}}
+\end{{minipage}}
+\end{{document}}
+";
+    }
+
+    private static bool IsLualatexAvailable()
+    {
+        try
+        {
+            using var p = Process.Start(new ProcessStartInfo("lualatex", "--version")
+            {
+                UseShellExecute = false,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+            });
+            if (p is null) return false;
+            return p.WaitForExit(5000) && p.ExitCode == 0;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}

src/Yavsc.Api.Test/FrontOfficeApiControllerTests.cs

@@ -1,6 +1,8 @@
+using System.Linq;
 using System.Net;
 using System.Net.Http.Headers;
 using System.Net.Http.Json;
+using System.Text.Json;
 using Microsoft.Extensions.DependencyInjection;
 using Yavsc.Api.Test.Fixtures;
 using Yavsc.Helpers;
@@ -43,19 +45,26 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
 
     private static HttpContent NoSignature() => JsonBody(new { });
 
-    private static HttpContent WithSignature() =>
-        JsonBody(new { strokes = SampleStrokes, coordinateMax = 10_000 });
+    private static HttpContent WithSignature(SignatureType? type = null) =>
+        type is null
+            ? JsonBody(new { strokes = SampleStrokes, coordinateMax = 10_000 })
+            : JsonBody(new { strokes = SampleStrokes, coordinateMax = 10_000, signatureType = type });
 
     private static JsonContent JsonBody(object value) =>
         JsonContent.Create(value, mediaType: new MediaTypeHeaderValue("application/json"));
 
     /// <summary>
-    /// Seeds an Rdv query with distinct parties (provider alice,
-    /// client bob) and, when <paramref name="withEstimate"/> is true,
-    /// an estimate linked to it via CommandId. Returns the query id
-    /// and (when seeded) the estimate id.
+    /// Seeds an Rdv query and, when <paramref name="withEstimate"/> is
+    /// true, an estimate linked to it via CommandId. The provider is
+    /// <paramref name="performer"/> (default alice) and the client is
+    /// <paramref name="client"/> (default bob) — pass the same value
+    /// for both to model a user who is both parties. Returns the query
+    /// id and (when seeded) the estimate id.
     /// </summary>
-    private (long queryId, long estimateId) SeedQuery(bool withEstimate)
+    private (long queryId, long estimateId) SeedQuery(
+        bool withEstimate,
+        string performer = "alice",
+        string client = "bob")
     {
         WorkflowHelpers.ConfigureBillingService();
         _fixture.ResetAndSeedActivityGraph();
@@ -68,11 +77,11 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
         var query = new RdvQuery
         {
             ActivityCode = "dev",
-            ClientId = "bob",
-            PerformerId = "alice",
+            ClientId = client,
+            PerformerId = performer,
             Consent = true,
-            UserCreated = "alice",
-            UserModified = "alice",
+            UserCreated = performer,
+            UserModified = performer,
             DateCreated = DateTime.UtcNow,
             DateModified = DateTime.UtcNow,
             EventDate = DateTime.UtcNow.AddDays(1),
@@ -89,8 +98,8 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
             var estimate = new Estimate
             {
                 CommandId = query.Id,
-                ClientId = "bob",
-                OwnerId = "alice",
+                ClientId = client,
+                OwnerId = performer,
                 CommandType = BillingCodes.Rdv,
                 Title = "Devis prestation",
                 Description = "Devis de test",
@@ -127,7 +136,8 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
         var assertDb = assertScope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
         var updated = assertDb.RdvQueries.Single(q => q.Id == queryId);
 
-        Assert.Equal(QueryStatus.Accepted, updated.Status);
+        // Default caller is "alice" (the provider) → ProAccepted.
+        Assert.Equal(QueryStatus.ProAccepted, updated.Status);
     }
 
     [Fact]
@@ -146,7 +156,7 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
         using var assertScope = _fixture.Services.CreateScope();
         var assertDb = assertScope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
 
-        Assert.Equal(QueryStatus.Accepted, assertDb.RdvQueries.Single(q => q.Id == queryId).Status);
+        Assert.Equal(QueryStatus.ProAccepted, assertDb.RdvQueries.Single(q => q.Id == queryId).Status);
 
         var estimate = assertDb.Estimates.Single(e => e.Id == estimateId);
         Assert.True(estimate.ProviderValidationDate != default);
@@ -173,7 +183,7 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
         using var assertScope = _fixture.Services.CreateScope();
         var assertDb = assertScope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
 
-        Assert.Equal(QueryStatus.Accepted, assertDb.RdvQueries.Single(q => q.Id == queryId).Status);
+        Assert.Equal(QueryStatus.ClientAccepted, assertDb.RdvQueries.Single(q => q.Id == queryId).Status);
 
         var estimate = assertDb.Estimates.Single(e => e.Id == estimateId);
         Assert.True(estimate.ClientValidationDate != default);
@@ -243,4 +253,90 @@ public sealed class FrontOfficeApiControllerTests : IClassFixture<ApiWebServerFi
 
         Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
     }
+
+    [Fact]
+    public async Task Estimate_payload_carries_existing_signature_strokes()
+    {
+        var (queryId, estimateId) = SeedQuery(withEstimate: true);
+
+        // Provider accepts with a signature.
+        using (var pro = NewClient(subject: "alice"))
+        {
+            var r = await pro.PostAsync(
+                $"/api/v1/front/query/accept?billingCode=Rdv&queryId={queryId}",
+                WithSignature(),
+                TestContext.Current.CancellationToken);
+            Assert.True(r.IsSuccessStatusCode, await r.Content.ReadAsStringAsync(TestContext.Current.CancellationToken));
+        }
+
+        // The estimate read endpoint carries the signature strokes on
+        // the estimate payload, so PostIt can repaint them on reopen.
+        using var reader = NewClient(subject: "alice");
+        var response = await reader.GetAsync(
+            $"/api/v1/estimate/{estimateId}",
+            TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+        var body = await response.Content.ReadFromJsonAsync<JsonElement>(TestContext.Current.CancellationToken);
+
+        // Signatures ride on the estimate payload as two dedicated
+        // slots, not a list: the provider signed here, so signaturePro
+        // is populated and signatureClient is absent/null.
+        var proSig = body.GetProperty("signaturePro");
+        Assert.Equal(JsonValueKind.Object, proSig.ValueKind);
+        Assert.Equal(JsonValueKind.Array, proSig.GetProperty("strokes").ValueKind);
+        Assert.True(body.TryGetProperty("signatureClient", out var cli)
+            && cli.ValueKind == JsonValueKind.Null,
+            "signatureClient should be null when only the provider has signed");
+    }
+
+    // When one user is both the provider and the client of a query, the
+    // server cannot infer which side they are signing as from identity
+    // alone (it would always pick the provider). The caller declares the
+    // side (signatureType=1 here = Client); the server honors it because
+    // the caller is that party, and stores a Client signature.
+    [Fact]
+    public async Task Accept_declared_client_side_stores_client_signature_when_user_is_both_parties()
+    {
+        var (queryId, estimateId) = SeedQuery(withEstimate: true, performer: "alice", client: "alice");
+
+        using var http = NewClient(subject: "alice");
+        var response = await http.PostAsync(
+            $"/api/v1/front/query/accept?billingCode=Rdv&queryId={queryId}",
+            WithSignature(SignatureType.Client), // signing as the client
+            TestContext.Current.CancellationToken);
+        var body = await response.Content.ReadAsStringAsync(TestContext.Current.CancellationToken);
+        Assert.True(response.StatusCode == HttpStatusCode.OK, $"Unexpected status {(int)response.StatusCode} ({response.StatusCode}): {body}");
+
+        using var assertScope = _fixture.Services.CreateScope();
+        var assertDb = assertScope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+
+        Assert.Equal(QueryStatus.ClientAccepted, assertDb.RdvQueries.Single(q => q.Id == queryId).Status);
+
+        var estimate = assertDb.Estimates.Single(e => e.Id == estimateId);
+        Assert.True(estimate.ClientValidationDate != default);
+        Assert.True(estimate.ProviderValidationDate == default);
+
+        var signature = assertDb.Signatures.Single(s => s.EstimateId == estimateId);
+        Assert.Equal(SignatureType.Client, signature.Type);
+        Assert.Equal("alice", signature.SignerId);
+    }
+
+    // A provider may not sign as the client (and vice versa): declaring
+    // the other party's side is refused even though the caller is a
+    // party to the query. Write is authorized only for the signature's
+    // author.
+    [Fact]
+    public async Task Accept_declaring_other_party_side_is_forbidden()
+    {
+        var (queryId, _) = SeedQuery(withEstimate: true); // provider alice, client bob
+
+        using var http = NewClient(subject: "alice"); // alice is the provider
+        var response = await http.PostAsync(
+            $"/api/v1/front/query/accept?billingCode=Rdv&queryId={queryId}",
+            WithSignature(SignatureType.Client), // alice tries to sign as the client
+            TestContext.Current.CancellationToken);
+
+        Assert.Equal(HttpStatusCode.Forbidden, response.StatusCode);
+    }
 }

src/Yavsc.Api.Test/Yavsc.Api.Test.csproj

@@ -8,8 +8,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="coverlet.collector" />
@@ -30,4 +30,4 @@
   <ItemGroup>
     <Using Include="Xunit" />
   </ItemGroup>
-</Project>
+</Project>

src/Yavsc.Api/Controllers/Business/BillingController.cs

@@ -157,6 +157,8 @@ namespace Yavsc.ApiControllers
                     .Where(q => allowedActivityCodes.Contains(q.ActivityCode))
                     .Where(q => q.Status == QueryStatus.Inserted
                         || q.Status == QueryStatus.Accepted
+                        || q.Status == QueryStatus.ProAccepted
+                        || q.Status == QueryStatus.ClientAccepted
                         || q.Status == QueryStatus.InProgress)
                     .Cast<NominativeServiceCommand>()
                     .ToList()
@@ -169,6 +171,8 @@ namespace Yavsc.ApiControllers
                     .Where(q => allowedActivityCodes.Contains(q.ActivityCode))
                     .Where(q => q.Status == QueryStatus.Inserted
                         || q.Status == QueryStatus.Accepted
+                        || q.Status == QueryStatus.ProAccepted
+                        || q.Status == QueryStatus.ClientAccepted
                         || q.Status == QueryStatus.InProgress)
                     .Cast<NominativeServiceCommand>()
                     .ToList()
@@ -181,6 +185,8 @@ namespace Yavsc.ApiControllers
                     .Where(q => allowedActivityCodes.Contains(q.ActivityCode))
                     .Where(q => q.Status == QueryStatus.Inserted
                         || q.Status == QueryStatus.Accepted
+                        || q.Status == QueryStatus.ProAccepted
+                        || q.Status == QueryStatus.ClientAccepted
                         || q.Status == QueryStatus.InProgress)
                     .Cast<NominativeServiceCommand>()
                     .ToList()
@@ -329,9 +335,9 @@ namespace Yavsc.ApiControllers
                 return new ChallengeResult();
             }
 
-            var filename = AbstractFileSystemHelpers.SignFileNameFormat("pro", billingCode, id);
+            var filename = AbstractFileSystemHelpers.SignFileNameFormat("cli", billingCode, id);
             FileInfo fi = new FileInfo(Path.Combine(siteSettings.Bills, filename));
-            if (!fi.Exists) return NotFound(new { Error = "Professional signature not found" });
+            if (!fi.Exists) return NotFound(new { Error = "Client signature not found" });
             return File(fi.OpenRead(), "application/x-pdf", filename);
         }
 

src/Yavsc.Api/Controllers/Business/EstimateApiController.cs

@@ -40,7 +40,7 @@ namespace Yavsc.Controllers
             else if (!UserIsAdminOrThis(ownerId)) // throw new Exception("Not authorized") ;
                                                   // or just do nothing
                 return new StatusCodeResult(StatusCodes.Status403Forbidden);
-            return Ok(_context.Estimates.Include(e => e.Bill).Where(e => e.OwnerId == ownerId));
+            return Ok(_context.Estimates.Include(e => e.Bill).Include(e => e.Signatures).Where(e => e.OwnerId == ownerId));
         }
         // GET: api/Estimate/5
         [HttpGet("{id}", Name = "GetEstimate")]
@@ -51,7 +51,7 @@ namespace Yavsc.Controllers
                 return BadRequest(ModelState);
             }
 
-            Estimate estimate = _context.Estimates.Include(e => e.Bill).Single(m => m.Id == id);
+            Estimate estimate = _context.Estimates.Include(e => e.Bill).Include(e => e.Signatures).Single(m => m.Id == id);
 
             if (estimate == null)
             {
@@ -209,21 +209,23 @@ namespace Yavsc.Controllers
         public IActionResult GetOngoingEstimatesAsClient()
         {
             var uid = User.GetUserId();
-            return Ok(_context.Estimates.Include(e => e.Bill)
+            return Ok(_context.Estimates.Include(e => e.Bill).Include(e => e.Signatures)
                 .Where(e => e.ClientId == uid
                     && e.ProviderValidationDate != default
                     && e.ClientValidationDate == default));
         }
 
         // GET: api/estimate/asprovider
-        // Ongoing estimates (not yet validated by the client) established
-        // by the current user as the provider.
+        // Estimates awaiting the provider's signature, established by the
+        // current user as the provider. Once the provider validates
+        // (ProviderValidationDate stamped), the estimate leaves this list
+        // and appears in the client's "awaiting client signature" list.
         [HttpGet("asprovider")]
         public IActionResult GetOngoingEstimatesAsProvider()
         {
             var uid = User.GetUserId();
-            return Ok(_context.Estimates.Include(e => e.Bill)
-                .Where(e => e.OwnerId == uid && e.ClientValidationDate == default));
+            return Ok(_context.Estimates.Include(e => e.Bill).Include(e => e.Signatures)
+                .Where(e => e.OwnerId == uid && e.ProviderValidationDate == default));
         }
 
         protected override void Dispose(bool disposing)

src/Yavsc.Api/Controllers/Business/FrontOfficeApiController.cs

@@ -1,6 +1,9 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Razor;
+using Microsoft.AspNetCore.Mvc.ViewEngines;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Options;
 using Yavsc.Abstract.Workflow;
 using Yavsc.Helpers;
 using Yavsc.Models;
@@ -8,6 +11,7 @@ using Yavsc.Models.Billing;
 using Yavsc.Services;
 using Yavsc.Server.Helpers;
 using Yavsc.ViewModels.FrontOffice;
+using Yavsc.ViewModels.Gen;
 
 namespace Yavsc.ApiControllers
 {
@@ -18,15 +22,36 @@ namespace Yavsc.ApiControllers
         ApplicationDbContext dbContext;
         private readonly IBillingService billing;
         private readonly ILogger logger;
+        private readonly SiteSettings siteSettings;
+        private readonly IRazorViewEngine viewEngine;
 
+        // The view-rendering dependencies (siteSettings, viewEngine) are
+        // optional: only EstimateTex/EstimatePdf use them, and those run in
+        // the Api host where Program.cs wires AddControllersWithViews +
+        // SiteSettings. The accept/reject endpoints (and the Api integration
+        // test host, which composes with AddControllers alone) never touch
+        // them, so they must not be required for controller activation.
+        //
+        // .NET 10 does not register a single IViewEngine service (the view
+        // engine is registered as IRazorViewEngine and surfaced through
+        // MvcViewOptions.ViewEngines). IRazorViewEngine (RazorViewEngine)
+        // implements IViewEngine, so we inject that and hand it to
+        // TeXHelpers.RenderViewToString as an IViewEngine. RenderViewToString
+        // builds its ActionContext from the controller's own ControllerContext,
+        // so no IActionContextAccessor is needed (and that type is deprecated
+        // in .NET 10).
         public FrontOfficeApiController(
             ApplicationDbContext context,
             ILoggerFactory loggerFactory,
+            IOptions<SiteSettings> siteSettings = null,
+            IRazorViewEngine viewEngine = null,
             IBillingService billing = null)
         {
             dbContext = context;
             this.billing = billing ?? new BillingService(context);
             logger = loggerFactory.CreateLogger<FrontOfficeApiController>();
+            this.siteSettings = siteSettings?.Value;
+            this.viewEngine = viewEngine;
         }
 
         [HttpGet("profiles/{actCode}")]
@@ -35,6 +60,126 @@ namespace Yavsc.ApiControllers
             return await dbContext.ListPerformersAsync(billing, actCode);
         }
 
+        // GET: api/front/query/{queryId}/estimate.tex
+        //
+        // Renders the estimate linked to the query (Estimate.CommandId ==
+        // queryId) as a LaTeX source document. The view is a generation
+        // template (Layout = "null"), not a web page: it is returned with
+        // a text/x-tex content type so the caller can save it as a .tex
+        // file. Either party (client or provider) or an admin may read it.
+        [HttpGet("query/{queryId}/estimate.tex")]
+        public async Task<IActionResult> EstimateTex(long queryId, CancellationToken token)
+        {
+            if (viewEngine is null || siteSettings is null)
+                return Problem("TeX rendering is not configured on this host.",
+                    statusCode: StatusCodes.Status503ServiceUnavailable);
+
+            var estimate = await LoadEstimateForRenderAsync(queryId, token);
+            if (estimate is null) return NotFound(new { Error = "no estimate linked to this query" });
+
+            var uid = User.GetUserId();
+            if (!User.IsInRole(Constants.AdminGroupName)
+                && uid != estimate.ClientId && uid != estimate.OwnerId)
+                return Forbid();
+
+            PrepareEstimateViewBag(estimate);
+            Response.ContentType = "text/x-tex";
+            return View("Estimate_tex", estimate);
+        }
+
+        // GET: api/front/query/{queryId}/estimate.pdf
+        //
+        // Renders the same LaTeX template to a string, compiles it to PDF
+        // via texi2pdf (see SiteSettings.GenerateEstimatePdf), and streams
+        // the generated PDF bytes back. Requires /usr/bin/texi2pdf on the
+        // server host; on hosts without it the endpoint returns a problem.
+        [HttpGet("query/{queryId}/estimate.pdf")]
+        public async Task<IActionResult> EstimatePdf(long queryId, CancellationToken token)
+        {
+            if (viewEngine is null || siteSettings is null)
+            {
+                string msg = "PDF rendering is not configured on this host.";
+                logger.LogError(msg);
+                         return Problem(msg,
+                    statusCode: StatusCodes.Status503ServiceUnavailable);
+
+            }
+
+            var estimate = await LoadEstimateForRenderAsync(queryId, token);
+            if (estimate is null) return NotFound(new { Error = "no estimate linked to this query" });
+
+            var uid = User.GetUserId();
+            if (!User.IsInRole(Constants.AdminGroupName)
+                && uid != estimate.ClientId && uid != estimate.OwnerId)
+                return Forbid();
+
+            PrepareEstimateViewBag(estimate);
+
+            var baseFileName = $"estimate-{estimate.Id}";
+            // Resolve the bills dir to an absolute path once: appsettings
+            // configures it as a relative path ("bills"), and both the
+            // generation (GenerateEstimatePdf) and the read-back below must
+            // agree on the same location regardless of the host's cwd.
+            var billsDir = new System.IO.DirectoryInfo(siteSettings.Bills).FullName;
+            var model = new PdfGenerationViewModel
+            {
+                BaseFileName = baseFileName,
+                DestDir = billsDir,
+                Temp = siteSettings.TempDir,
+            };
+
+            try
+            {
+                // 1. Render the LaTeX template (Estimate_tex) to a TeX source
+                //    string, using the estimate as the view model.
+                model.TeXSource = this.RenderViewToString(viewEngine, "Estimate_tex", estimate);
+                // 2. Render the generation view (Estimate_pdf). Its @{} block
+                //    calls SiteSettings.GenerateEstimatePdf(Model), which
+                //    compiles the TeX to PDF on disk as a side effect of the
+                //    render. The HTML the view emits is not what we return —
+                //    we stream the generated PDF bytes — but driving the
+                //    generation through the view keeps the template as the
+                //    output producer, per the original design.
+                if (model.GenerateEstimatePdf() is FileInfo fo && fo.Exists)
+                {
+                     return File(fo.OpenRead(), "application/pdf");
+                }
+                string msg = "TeX render failed: " + model.GenerationErrorMessage;
+                logger.LogError(msg);
+                return Problem(msg);
+
+            }
+            catch (Exception ex)
+            {
+                logger.LogError(ex, "estimate {QueryId}: TeX/PDF render failed", queryId);
+                return Problem("TeX render failed: " + ex.Message);
+            }
+      }
+
+        // Loads the estimate linked to a query with the navigation the
+        // Estimate_tex template reads (client + performer profile + bill
+        // + the captured signatures, drawn as tikz at the foot of the devis).
+        private Task<Estimate?> LoadEstimateForRenderAsync(long queryId, CancellationToken token)
+            => dbContext.Estimates
+                .Where(e => e.CommandId == queryId)
+                .OrderByDescending(e => e.Id)
+                .Include(e => e.Bill)
+                .Include(e => e.Signatures)
+                .Include(e => e.Query).ThenInclude(q => q!.Client).ThenInclude(c => c!.PostalAddress)
+                .Include(e => e.Query).ThenInclude(q => q!.PerformerProfile).ThenInclude(p => p!.OrganizationAddress)
+                .Include(e => e.Query).ThenInclude(q => q!.PerformerProfile).ThenInclude(p => p!.Performer)
+                .FirstOrDefaultAsync(token);
+
+        // Sets the ViewBag keys the Estimate_tex template reads. A devis
+        // is never a bill (AsBill=false) and is never acquitted.
+        private void PrepareEstimateViewBag(Estimate estimate)
+        {
+            ViewBag.AsBill = false;
+            ViewBag.Acquitted = false;
+            ViewBag.BillsDir = new System.IO.DirectoryInfo(siteSettings.Bills).FullName;
+            ViewBag.AvatarsDir = new System.IO.DirectoryInfo(siteSettings.Avatars).FullName;
+        }
+
         // POST: api/front/query/accept
         //
         // Either party of the query may accept: the provider
@@ -57,6 +202,15 @@ namespace Yavsc.ApiControllers
             if (query is null) return BadRequest(new { Error = "query not found" });
 
             Signature? signature = null;
+            // actingRole is the role the caller is signing / accepting
+            // as. It defaults to the role inferred from the caller's
+            // identity, but when a signature is submitted the caller
+            // declares the side (Pro/Client) and the server honors it
+            // only if the caller is that party. This disambiguates a
+            // user who is both parties (where inference would always
+            // pick the provider) and makes "write only for its author"
+            // explicit.
+            ActorRole actingRole = role;
             if (HasSignature(body))
             {
                 // Admins bypass authorization but are neither party of
@@ -71,20 +225,37 @@ namespace Yavsc.ApiControllers
                 if (estimate is null)
                     return BadRequest(new { Error = "no estimate linked to this query" });
 
-                var type = role == ActorRole.Provider
+                var uid = User.GetUserId();
+                bool isProvider = query.PerformerId == uid;
+                bool isClient = query.ClientId == uid;
+
+                // The caller declares which side they sign as. Null
+                // falls back to the role inferred from identity.
+                var declared = body!.SignatureType;
+                if (declared.HasValue)
+                {
+                    if (declared.Value == SignatureType.Pro && !isProvider)
+                        return Forbid();
+                    if (declared.Value == SignatureType.Client && !isClient)
+                        return Forbid();
+                    actingRole = declared.Value == SignatureType.Pro
+                        ? ActorRole.Provider
+                        : ActorRole.Client;
+                }
+
+                var type = actingRole == ActorRole.Provider
                     ? SignatureType.Pro
                     : SignatureType.Client;
 
                 var payload = new SignaturePadPayload
                 {
-                    CoordinateMax = body!.CoordinateMax,
+                    CoordinateMax = body.CoordinateMax,
                     CapturedAtUtc = body.CapturedAtUtc ?? DateTime.UtcNow,
                     Strokes = body.Strokes!,
                 };
 
                 try
                 {
-                    var uid = User.GetUserId();
                     signature = await EstimateSignaturePersister.StageAsync(
                         dbContext, estimate.Id, type, uid, payload, token);
                 }
@@ -94,13 +265,22 @@ namespace Yavsc.ApiControllers
                     return BadRequest(new { Error = "signature stage failed", Detail = ex.Message });
                 }
 
-                if (role == ActorRole.Provider)
+                if (actingRole == ActorRole.Provider)
                     estimate.ProviderValidationDate = DateTime.UtcNow;
                 else
                     estimate.ClientValidationDate = DateTime.UtcNow;
             }
 
-            query.Status = QueryStatus.Accepted;
+            // The party-specific status records who accepted: the
+            // provider (ProAccepted) or the client (ClientAccepted).
+            // An admin accepting (neither party) falls back to the
+            // legacy generic Accepted.
+            query.Status = actingRole switch
+            {
+                ActorRole.Provider => QueryStatus.ProAccepted,
+                ActorRole.Client => QueryStatus.ClientAccepted,
+                _ => QueryStatus.Accepted,
+            };
 
             try
             {
@@ -190,28 +370,3 @@ namespace Yavsc.ApiControllers
 
     internal enum ActorRole { None, Provider, Client, Admin }
 }
-
-namespace Yavsc.ViewModels.FrontOffice
-{
-    /// <summary>
-    /// Body of <c>POST /api/v1/front/query/accept</c> and
-    /// <c>.../reject</c>. The <see cref="Strokes"/> field is optional:
-    /// when present (non-empty) on accept, it is the PostIt wire-format
-    /// signature captured with the acceptance. All fields are optional
-    /// so a caller may post <c>{}</c> to accept/reject without a
-    /// signature.
-    /// </summary>
-    public class QueryAcceptanceRequest
-    {
-        /// <summary>
-        /// Wire-format strokes. See
-        /// <c>PostIt.Models.SignaturePadData</c>. Null or empty means
-        /// no signature.
-        /// </summary>
-        public int[]? Strokes { get; set; }
-
-        public int CoordinateMax { get; set; } = 10_000;
-
-        public DateTime? CapturedAtUtc { get; set; }
-    }
-}

src/Yavsc.Api/Helpers/TeXHelpers.cs

@@ -0,0 +1,325 @@
+using System.Diagnostics;
+using System.Globalization;
+using System.Text;
+using Microsoft.AspNetCore.Html;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.AspNetCore.Mvc.ViewEngines;
+using Microsoft.AspNetCore.Mvc.ViewFeatures;
+using Yavsc.Models.Billing;
+
+namespace Yavsc.Helpers
+{
+    using Microsoft.AspNetCore.Mvc.Razor;
+    using ViewModels.Gen;
+    public class TeXString : HtmlString
+    {
+
+        public TeXString(TeXString teXString): base(teXString.ToString())
+        {
+        }
+
+        public TeXString(string str) : base(str)
+        {
+
+
+        }
+
+        public static TeXString operator+ (TeXString a, TeXString b) {
+            return new TeXString(a.ToString()+b.ToString());
+        }
+
+    }
+    public class Replacement
+        {
+            string target;
+            string replacement;
+            public Replacement(string target, string replacement)
+            {
+                this.target = target;
+                this.replacement = replacement;
+            }
+            public string Execute(string source)
+            {
+                return source?.Replace(target, replacement) ?? null;
+            }
+        }
+    public static class TeXHelpers
+    {
+        public static readonly  Replacement[] SpecialCharsDefaultRendering =
+        {
+            new Replacement("<","\\textless"),
+            new Replacement(">","\\textgreater"),
+            new Replacement("©","\\copyright"),
+            new Replacement("®","\\textregistered"),
+            new Replacement("\\","\\textbackslash"),
+            new Replacement("™","\\texttrademark"),
+            new Replacement("¶","\\P"),
+            new Replacement("|","\\textbar"),
+            new Replacement("%","\\%"),
+            new Replacement("{","\\{"),
+            new Replacement("}","\\}"),
+            new Replacement("_","\\_"),
+            new Replacement("#","\\#"),
+            new Replacement("$","\\$"),
+            new Replacement("_","\\_"),
+            new Replacement("¿","\\textquestiondown"),
+            new Replacement("§","\\S"),
+            new Replacement("£","\\pounds"),
+            new Replacement("&","\\&"),
+            new Replacement("¡","\\textexclamdown"),
+            new Replacement("†","\\dag"),
+            new Replacement("–","\\textendash"),
+            new Replacement("°","\\textdegree")
+        };
+
+         public static TeXString ToTeX(this string source, string defaultValue="\\textit{néant}")
+        {
+            if (source==null) return new TeXString(defaultValue);
+            string result=source;
+            foreach (var r in SpecialCharsDefaultRendering)
+            {
+                result = r.Execute(result);
+            }
+            return new TeXString(result);
+        }
+
+        public static TeXString ToTeXCell(this string source, string defaultValue="\\textit{néant}")
+        {
+            if (source==null) return new TeXString(defaultValue);
+            string result=source;
+            foreach (var r in SpecialCharsDefaultRendering)
+            {
+                result = r.Execute(result);
+            }
+            result = result.Replace("\n","\\tabularnewline ");
+            return new TeXString(result);
+        }
+
+
+        public static string NewLinesWith(this string target, string separator)
+        {
+            var items = target.Split(new char[] { '\n' }).Where(
+                s => !string.IsNullOrWhiteSpace(s));
+
+            return string.Join(separator, items);
+        }
+
+        public static TeXString ToTeXLines(this string source, string defaultValue, string lineSeparator = "\n\\\\")
+        {
+            if (source == null) return new TeXString(defaultValue);
+            return new TeXString( source.ToTeX().ToString().NewLinesWith(lineSeparator) );
+        }
+
+        public static TeXString SplitAddressToTeX (this string source, string lineSeparator = "\n\\\\", string defaultValue = "\\textit{pas d'adresse postale}")
+        {
+            if (string.IsNullOrWhiteSpace(source)) return new TeXString(defaultValue);
+            var alines = source.Split(',');
+            var texlines = alines.Select(l=>l.ToTeX().ToString());
+            return new TeXString(string.Join(lineSeparator,texlines));
+        }
+
+        /// <summary>
+        /// Renders a captured signature as TikZ <c>\draw</c>/<c>\fill</c>
+        /// paths, suitable for embedding in a <c>tikzpicture</c> at the
+        /// foot of a devis. The signature is the PostIt wire format — a
+        /// length-prefixed sequence of strokes, each stroke being
+        /// <c>[k, x0, y0, x1, y1, …]</c> with coordinates normalised to
+        /// <c>[0, CoordinateMax]</c> and y growing downward (screen
+        /// orientation). We denormalise to a <paramref name="widthCm"/> ×
+        /// <paramref name="heightCm"/> canvas and flip y so the signature
+        /// appears upright on paper. A single-point stroke (a pen-down
+        /// tap) is rendered as a filled dot, mirroring the round-capped
+        /// <c>Polyline</c> the Avalonia pad draws for it.
+        /// </summary>
+        /// <param name="sig">The persisted signature. Null/empty yields
+        /// <see cref="HtmlString.Empty"/>, so the caller can gate the
+        /// <c>tikzpicture</c> on a non-empty result.</param>
+        public static HtmlString SignatureToTikz(
+            this Signature sig, double widthCm, double heightCm)
+        {
+            if (sig is null || sig.Strokes is null || sig.Strokes.Length == 0)
+                return HtmlString.Empty;
+
+            double max = sig.CoordinateMax > 0 ? sig.CoordinateMax : 10_000.0;
+            var strokes = sig.Strokes;
+            var sb = new StringBuilder();
+
+            int i = 0;
+            while (i < strokes.Length)
+            {
+                int k = strokes[i];
+                if (k <= 0) break;
+                if (i + 1 + 2 * k > strokes.Length) break;
+                i++; // skip the length prefix
+
+                // A single-point stroke: a tap. Draw a round dot so it
+                // shows instead of a zero-length, invisible \draw.
+                if (k == 1)
+                {
+                    double px = strokes[i] / max * widthCm;
+                    double py = heightCm - strokes[i + 1] / max * heightCm;
+                    sb.Append(CultureInfo.InvariantCulture,
+                        $"\\fill ({px:F3},{py:F3}) circle (0.8pt); ");
+                    i += 2;
+                    continue;
+                }
+
+                sb.Append("\\draw[line cap=round, line join=round, line width=1.5pt] ");
+                for (int p = 0; p < k; p++)
+                {
+                    double px = strokes[i + 2 * p] / max * widthCm;
+                    double py = heightCm - strokes[i + 2 * p + 1] / max * heightCm;
+                    if (p == 0) sb.Append(CultureInfo.InvariantCulture,
+                        $"({px:F3},{py:F3})");
+                    else sb.Append(CultureInfo.InvariantCulture,
+                        $" -- ({px:F3},{py:F3})");
+                }
+                sb.Append("; ");
+                i += 2 * k;
+            }
+
+            return new HtmlString(sb.ToString());
+        }
+
+        public static FileInfo GenerateEstimatePdf(this PdfGenerationViewModel Model)
+        {
+            string errorMsg = null;
+            // Resolve to an absolute path: SiteSettings.Bills may be a
+            // relative path (e.g. "bills"), and lualatex resolves
+            // -output-directory against its working directory — passing a
+            // relative path to both would nest them (<cwd>/bills/bills) and
+            // the log/pdf write would fail.
+            var billdir = new DirectoryInfo(Model.DestDir).FullName;
+            string name = Model.BaseFileName;
+            FileInfo fo = new FileInfo(System.IO.Path.Combine(billdir, name + ".pdf"));
+            System.IO.Directory.CreateDirectory(billdir);
+
+            // Compile the LaTeX source with the system lualatex, feeding it
+            // the TeX on standard input (no intermediate .tex file) and
+            // directing the resulting <name>.pdf straight into the bills
+            // directory. lualatex is a file-based engine — it cannot emit
+            // the PDF on stdout — so the pdf lands at its final destination
+            // and we only clean the transient aux/log artifacts beside it.
+            //
+            // We pass "/dev/stdin" as the input filename so lualatex treats
+            // stdin as a regular input *file* rather than the terminal: with
+            // no filename argument it reads stdin in terminal mode, which
+            // emergency-stops after the first line of a multi-line document.
+            // /dev/stdin makes the full multi-line TeX compile cleanly. (The
+            // API host is Linux — the systemd service and lualatex dep are
+            // Linux-only too.)
+            //
+            // We capture stdout/stderr so a LaTeX error (missing .sty,
+            // missing \includegraphics target, …) is surfaced in
+            // GenerationErrorMessage instead of being buried in the .log
+            // we then delete.
+            int exitCode;
+            string stdout = null, stderr = null;
+            try
+            {
+                using (Process p = new Process())
+                {
+                    p.StartInfo = new ProcessStartInfo
+                    {
+                        UseShellExecute = false,
+                        WorkingDirectory = billdir,
+                        FileName = "lualatex",
+                        Arguments = $"-interaction=nonstopmode -halt-on-error"
+                            + $" -jobname=\"{name}\" -output-directory=\"{billdir}\""
+                            + " /dev/stdin",
+                        RedirectStandardInput = true,
+                        RedirectStandardOutput = true,
+                        RedirectStandardError = true,
+                    };
+                    p.Start();
+                    // Write the TeX source, then drain stdout/stderr. Read
+                    // them after WaitForExit — lualatex's output is small
+                    // (a few KB), well under the pipe buffer, so no deadlock.
+                    using (var stdin = p.StandardInput)
+                    {
+                        stdin.Write(Model.TeXSource);
+                    }
+                    p.WaitForExit();
+                    exitCode = p.ExitCode;
+                    stdout = p.StandardOutput.ReadToEnd();
+                    stderr = p.StandardError.ReadToEnd();
+                }
+            }
+            catch (Exception ex)
+            {
+                errorMsg = "lualatex invocation failed: " + ex.Message;
+                exitCode = -1;
+            }
+
+            if (exitCode != 0 && errorMsg == null)
+            {
+                // Surface the engine's own diagnostics (stderr carries the
+                // "! Emergency stop" / "! LaTeX Error: …" lines; stdout has
+                // the transcript banner) so the caller can see why it failed
+                // without having to find the (soon-deleted) .log file.
+                var diag = string.IsNullOrWhiteSpace(stderr) ? stdout : stderr;
+                errorMsg = $"Pdf generation failed with exit code {exitCode}: {diag}";
+            }
+            else if (!fo.Exists && errorMsg == null)
+                errorMsg = "Pdf generation produced no output";
+
+            // Remove the LaTeX build artifacts left beside the pdf so only
+            // <name>.pdf persists in the bills directory. Keep the .log on
+            // failure so it can be inspected.
+            foreach (var ext in new[] { ".aux", ".log", ".out", ".fls",
+                        ".fdb_latexmk", ".synctex.gz", ".toc" })
+            {
+                if (ext == ".log" && !fo.Exists) continue;
+                var fileName = name + ext;
+                var f = new FileInfo(System.IO.Path.Combine(billdir, fileName));
+                if (f.Exists) { try { f.Delete(); } catch { } }
+            }
+
+            Model.Generated = fo.Exists;
+            Model.GenerationErrorMessage = new HtmlString(errorMsg);
+            return fo;
+        }
+
+        public static string RenderViewToString(
+            this Controller controller, IRazorViewEngine engine,
+            string viewName, object model, bool isMainPage = true)
+        {
+            if (engine == null)
+                throw new InvalidOperationException("no engine");
+
+            // Build an ActionContext from the controller's own context —
+            // .NET 10 deprecated IActionContextAccessor, and the controller
+            // already holds the live request context on its ControllerContext.
+            var controllerContext = controller.ControllerContext;
+            var actionContext = new ActionContext(
+                controllerContext.HttpContext,
+                controllerContext.RouteData,
+                controllerContext.ActionDescriptor);
+
+            ViewEngineResult viewResult = engine.FindView(actionContext, viewName, isMainPage);
+            if (!viewResult.Success)
+                throw new InvalidOperationException(
+                    $"View '{viewName}' not found. Searched locations: "
+                    + string.Join(", ", viewResult.SearchedLocations));
+
+            // Hand the model to the view through ViewData so the template's
+            // @model directive resolves it (the previous implementation never
+            // set ViewData.Model, leaving Model null inside the template).
+            controller.ViewData.Model = model;
+
+            using (var sw = new StringWriter())
+            {
+                var viewContext = new ViewContext(
+                    actionContext,
+                    viewResult.View,
+                    controller.ViewData,
+                    controller.TempData,
+                    sw,
+                    new HtmlHelperOptions());
+                viewResult.View.RenderAsync(viewContext).GetAwaiter().GetResult();
+                return sw.GetStringBuilder().ToString();
+            }
+        }
+    }
+}

src/Yavsc.Api/Program.cs

@@ -55,7 +55,11 @@ internal class Program
                 });
             })
             .AddYavscCors(builder.Configuration)
-            .AddControllers();
+            .AddControllersWithViews();
+
+        // Binds the "Site" section (Bills, TempDir, Avatars, …) used by
+        // the document-generation flow and BillingController.
+        services.Configure<SiteSettings>(builder.Configuration.GetSection("Site"));
 
         // accepts any access token issued by identity server
         services.AddAuthentication("Bearer")

src/Yavsc.Api/ViewModels/FrontOffice/QueryAcceptanceRequest.cs

@@ -0,0 +1,40 @@
+using Yavsc.Models.Billing;
+
+namespace Yavsc.ViewModels.FrontOffice
+{
+    /// <summary>
+    /// Body of <c>POST /api/v1/front/query/accept</c> and
+    /// <c>.../reject</c>. The <see cref="Strokes"/> field is optional:
+    /// when present (non-empty) on accept, it is the PostIt wire-format
+    /// signature captured with the acceptance. All fields are optional
+    /// so a caller may post <c>{}</c> to accept/reject without a
+    /// signature.
+    /// </summary>
+    public class QueryAcceptanceRequest
+    {
+        /// <summary>
+        /// Wire-format strokes. See
+        /// <c>PostIt.Models.SignaturePadData</c>. Null or empty means
+        /// no signature.
+        /// </summary>
+        public int[]? Strokes { get; set; }
+
+        public int CoordinateMax { get; set; } = 10_000;
+
+        public DateTime? CapturedAtUtc { get; set; }
+
+        /// <summary>
+        /// Which signature is being submitted:
+        /// <see cref="SignatureType.Pro"/> (the provider) or
+        /// <see cref="SignatureType.Client"/>. When <see cref="Strokes"/>
+        /// is present this declares the side the caller is signing as;
+        /// the server honors it only if the caller is that party
+        /// (<c>query.PerformerId</c> for Pro, <c>query.ClientId</c>
+        /// for Client). This disambiguates the case where one user is
+        /// both parties, and makes "write only for its author"
+        /// explicit. When null, the server falls back to the role
+        /// inferred from the caller's identity.
+        /// </summary>
+        public SignatureType? SignatureType { get; set; }
+    }
+}

src/Yavsc.Api/ViewModels/Gen/PdfGenerationViewModel.cs

@@ -5,7 +5,7 @@ namespace Yavsc.ViewModels.Gen
 {
     public class PdfGenerationViewModel
     {
-        
+
         [Required]
         public string TeXSource { get; set; }
         [Required]

src/Yavsc.Api/Views/Shared/Bill_tex.cshtml

@@ -3,7 +3,7 @@
 @using System.Globalization
 @model IBillable
 @{
-    Layout = "null";
+    Layout = null;
     var pro = ViewBag.PerformerProfile;
     var from = ViewBag.Performer;
     var to = ViewBag.Client;

src/Yavsc.Api/Views/Shared/Estimate_tex.cshtml

@@ -3,7 +3,7 @@
 @using System.Globalization
 @model Estimate
 @{
-    Layout = "null";
+    Layout = null;
     var pro = Model.Query.PerformerProfile;
     var from = Model.Query.PerformerProfile.Performer;
     var to = Model.Query.Client;
@@ -11,7 +11,6 @@
     var proaddr = Model.Query.PerformerProfile.OrganizationAddress.Address.SplitAddressToTeX();
     var proaddrm = new HtmlString(Model.Query.PerformerProfile.OrganizationAddress.Address);
     var isestimate = !ViewBag.AsBill;
-    var prosign = new FileInfo($"{ViewBag.BillsDir}/estimate-prosign-{Model.Id}.png");
 
 }
 \documentclass[french,11pt]{article}
@@ -25,6 +24,7 @@
 \usepackage{graphicx}
 \usepackage{fancyhdr}
 \usepackage{fp}
+\usepackage{tikz}
 
 \def\TVA{20}    % Taux de la TVA
 
@@ -49,7 +49,7 @@
     \global\let\TotalHT\TotalHT
     \global\let\TotalTVA\TotalTVA
     \global\let\TotalTTC\TotalTTC
-    \cr 
+    \cr
     \hline
     \textbf{Total}    & & &    \TotalHT
 }
@@ -77,12 +77,12 @@
 % Infos Client
 \def\ClientNom{@TeXHelpers.ToTeX(to.UserName)}    % Nom du client
 
-\def\ClientAdresse{                    
+\def\ClientAdresse{
 % Adresse du client
 @PostalAddress
 @if (PostalAddress!=null) {<text>@PostalAddress</text>}
 @if (!string.IsNullOrWhiteSpace(to.PhoneNumber)) {<text>@TeXHelpers.ToTeX(to.PhoneNumber)<text>\\</text>
-   </text>} 
+   </text>}
   E-mail:  @TeXHelpers.ToTeX(to.Email)
 }
 
@@ -105,7 +105,7 @@
 
 \renewcommand{\headrulewidth}{0pt}
 \cfoot{   @TeXHelpers.ToTeX(from.UserName)  @if (proaddrm!=null) { <text> - @proaddrm </text> } \newline
-    \small{ E-mail:  @TeXHelpers.ToTeX(from.Email) @if (!string.IsNullOrWhiteSpace(from.PhoneNumber)) {  <text> - Téléphone fixe:  @TeXHelpers.ToTeX(from.PhoneNumber) </text>  } 
+    \small{ E-mail:  @TeXHelpers.ToTeX(from.Email) @if (!string.IsNullOrWhiteSpace(from.PhoneNumber)) {  <text> - Téléphone fixe:  @TeXHelpers.ToTeX(from.PhoneNumber) </text>  }
     }
 }
 
@@ -113,10 +113,10 @@
 
 % Logo de la société
 @if (from.Avatar != null) {
-<text>\includegraphics[height=60pt]{@(ViewBag.AvatarsDir)/@(from.UserName).png}  
+<text>\includegraphics[height=60pt, viewport=0 0 128 128]{@(ViewBag.AvatarsDir)/@(from.UserName).png}
 </text>
-} else { 
-<text>%\includegraphics{logo.png}
+} else {
+<text>%\includegraphics[height=60pt, viewport=0 0 128 128]{logo.png}
 </text>
 }
 % Nom et adresse de la société
@@ -170,12 +170,12 @@
     \begin{center}
         \begin{tabular}{|c c c c|}
 @if (!string.IsNullOrWhiteSpace(bi.BankCode) && !string.IsNullOrWhiteSpace(bi.WicketCode)
-        && !string.IsNullOrWhiteSpace(bi.AccountNumber) ) { 
+        && !string.IsNullOrWhiteSpace(bi.AccountNumber) ) {
 <text>\hline \textbf{Code banque} & \textbf{Code guichet} & \textbf{N° de Compte} & \textbf{Clé RIB} \\
 @bi.BankCode                      &  @bi.WicketCode       & @bi.AccountNumber     & @bi.BankedKey   \\
 </text>
          }
-        @if (!string.IsNullOrWhiteSpace(@bi.IBAN) && !string.IsNullOrWhiteSpace(@bi.BIC)) { 
+        @if (!string.IsNullOrWhiteSpace(@bi.IBAN) && !string.IsNullOrWhiteSpace(@bi.BIC)) {
             <text>
                \hline     \textbf{IBAN N°}        & \multicolumn{3}{|l|}{  @bi.IBAN  }         \\
             \hline     \textbf{Code BIC}        & \multicolumn{3}{|l|}{  @bi.BIC  }
@@ -188,19 +188,46 @@
 }
 
 
-@if (!(Model.ProviderValidationDate==null)) {
-    <text>
-\begin{flushright}
-  @(new HtmlString(isestimate?"Devis validé":"Facture validée")) le @TeXHelpers.ToTeX(Model.ProviderValidationDate.ToString("dddd dd MMMM yyyy"))
-\end{flushright}
-@if (prosign.Exists) {
-<text>
-\begin{center}
-	\hspace{263pt}
-    \includegraphics[height=60pt]{@(ViewBag.BillsDir)/estimate-prosign-@(Model.Id).png}
-\end{center}
-</text>
+@{
+    // Captured signatures, if any. The Estimate.Signatures collection
+    // is loaded by the controller; SignaturePro/SignatureClient project
+    // the row by type. We draw them as vector TikZ at the foot of the
+    // devis (see TeXHelpers.SignatureToTikz), so there is no PNG to
+    // produce or \includegraphics to fail on.
+    var fr = CultureInfo.CreateSpecificCulture("fr-FR");
+    var proSig = Model.SignaturePro;
+    var cliSig = Model.SignatureClient;
 }
-    </text>
+
+\vspace{2em}
+\noindent
+\begin{minipage}[t]{0.45\textwidth}
+  \textbf{Signature du fournisseur}\\
+@if (Model.ProviderValidationDate != default(DateTime)) {
+<text>\small Validé le @TeXHelpers.ToTeX(Model.ProviderValidationDate.ToString("dddd dd MMMM yyyy", fr))\\</text>
 }
+@if (proSig != null && proSig.Strokes != null && proSig.Strokes.Length > 0) {
+<text>\begin{tikzpicture}
+  \useasboundingbox (0,0) rectangle (5,2.5);
+  @proSig.SignatureToTikz(5, 2.5)
+\end{tikzpicture}</text>
+} else {
+<text>\rule[-2.2cm]{5cm}{0.4pt}</text>
+}
+\end{minipage}\hfill
+\begin{minipage}[t]{0.45\textwidth}
+  \textbf{Signature du client}\\
+@if (Model.ClientValidationDate != default(DateTime)) {
+<text>\small Validé le @TeXHelpers.ToTeX(Model.ClientValidationDate.ToString("dddd dd MMMM yyyy", fr))\\</text>
+}
+@if (cliSig != null && cliSig.Strokes != null && cliSig.Strokes.Length > 0) {
+<text>\begin{tikzpicture}
+  \useasboundingbox (0,0) rectangle (5,2.5);
+  @cliSig.SignatureToTikz(5, 2.5)
+\end{tikzpicture}</text>
+} else {
+<text>\rule[-2.2cm]{5cm}{0.4pt}</text>
+}
+\end{minipage}
+
 \end{document}

src/Yavsc.Api/Views/_ViewImports.cshtml

@@ -0,0 +1,12 @@
+@using Yavsc
+@using Yavsc.Helpers
+@using Yavsc.Billing
+@using Yavsc.Models
+@using Yavsc.Models.Billing
+@using Yavsc.ViewModels.Gen
+@using Microsoft.AspNetCore.Mvc
+@using Microsoft.AspNetCore.Html
+
+@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
+
+@inject Microsoft.Extensions.Options.IOptions<SiteSettings> SiteSettings

src/Yavsc.Api/Yavsc.Api.csproj

@@ -7,8 +7,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" />

src/Yavsc.Blogs.Tests/Yavsc.Blogs.Tests.csproj

@@ -9,8 +9,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="coverlet.collector" />
@@ -32,4 +32,4 @@
   <ItemGroup>
     <Using Include="Xunit" />
   </ItemGroup>
-</Project>
+</Project>

src/Yavsc.Blogs/Yavsc.Blogs.csproj

@@ -8,8 +8,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" />

src/Yavsc.Org.Tests/Yavsc.Org.Tests.csproj

@@ -11,8 +11,8 @@
     <RunSettingsFilePath>$(MSBuildProjectDirectory)\test.runsettings</RunSettingsFilePath>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="coverlet.collector" />
@@ -88,4 +88,4 @@
     </ItemGroup>
     <Copy SourceFiles="@(_YavscOrgStaticAssetsFiles)" DestinationFolder="$(OutDir)" />
   </Target>
-</Project>
+</Project>

src/Yavsc.Org/Controllers/Contracting/FrontOfficeController.cs

@@ -8,7 +8,6 @@ namespace Yavsc.Controllers
     using Helpers;
     using Microsoft.EntityFrameworkCore;
     using Microsoft.Extensions.Localization;
-    using Microsoft.Extensions.Options;
     using Models;
     using ViewModels.FrontOffice;
     using Yavsc.Server.Helpers;
@@ -21,22 +20,20 @@ namespace Yavsc.Controllers
         readonly ILogger _logger;
         readonly IStringLocalizer _SR;
         private readonly IBillingService _billing;
-        private readonly SiteSettings _siteSettings;
 
         public FrontOfficeController(ApplicationDbContext context,
             UserManager<ApplicationUser> userManager,
             IBillingService billing,
             ILoggerFactory loggerFactory,
-        IStringLocalizer<FrontOfficeController> SR,
-        IOptions<SiteSettings> siteSettings)
+        IStringLocalizer<FrontOfficeController> SR)
         {
             _context = context;
             _userManager = userManager;
             _logger = loggerFactory.CreateLogger<FrontOfficeController>();
             _SR = SR;
             _billing = billing;
-            _siteSettings = siteSettings.Value;
         }
+
         public ActionResult Index()
         {
             var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
@@ -46,9 +43,9 @@ namespace Yavsc.Controllers
             {
                 EstimateToProduceCount = _context.RdvQueries.Where(c => c.PerformerId == uid && c.EventDate > now &&  c.Status == QueryStatus.Inserted
                && c.ValidationDate == null && !_context.Estimates.Any(e => e.CommandId == c.Id)).Count(),
-                EstimateToHonorAsProCount = _context.RdvQueries.Where(c => c.PerformerId == uid && c.EventDate > now &&  c.Status == QueryStatus.Accepted
+                EstimateToHonorAsProCount = _context.RdvQueries.Where(c => c.PerformerId == uid && c.EventDate > now &&  (c.Status == QueryStatus.ProAccepted || c.Status == QueryStatus.Accepted)
                 && c.ValidationDate == null && _context.Estimates.Any(e => e.CommandId == c.Id )).Count(),
-                EstimateToSignAsCliCount = _context.Estimates.Where(e => e.ClientId == uid && e.Query.Status == QueryStatus.Accepted).Count(),
+                EstimateToSignAsCliCount = _context.Estimates.Where(e => e.ClientId == uid && (e.Query.Status == QueryStatus.ProAccepted || e.Query.Status == QueryStatus.Accepted)).Count(),
 
                 BillToSignAsCliCount = 0,
                 NewPayementsCount = 0
@@ -80,61 +77,5 @@ namespace Yavsc.Controllers
             return View(result);
         }
 
-
-        [Produces("text/x-tex"), Authorize, Route("estimate-{id}.tex")]
-        [HttpGet]
-        public ViewResult EstimateTex(long id)
-        {
-            var estimate = _context.Estimates.Include(x => x.Query)
-            .Include(x => x.Query.Client)
-            .Include(x => x.Query.PerformerProfile)
-            .Include(x => x.Query.PerformerProfile.OrganizationAddress)
-            .Include(x => x.Query.PerformerProfile.Performer)
-            .Include(e => e.Bill).FirstOrDefault(x => x.Id == id);
-            Response.ContentType = "text/x-tex";
-            return View("Estimate.tex", estimate);
-        }
-
-        [Authorize, Route("Estimate-{id}.pdf")]
-        [HttpGet]
-        public IActionResult EstimatePdf(long id)
-        {
-            ViewBag.TempDir = _siteSettings.TempDir;
-            ViewBag.BillsDir = _siteSettings.Bills;
-            var estimate = _context.Estimates.Include(x => x.Query)
-            .Include(x => x.Query.Client)
-            .Include(x => x.Query.PerformerProfile)
-            .Include(x => x.Query.PerformerProfile.OrganizationAddress)
-            .Include(x => x.Query.PerformerProfile.Performer)
-            .Include(e => e.Bill).FirstOrDefault(x => x.Id == id);
-            if (estimate == null)
-                throw new Exception("No data");
-            return View("Estimate.pdf", estimate);
-        }
-
-        [Authorize]
-        public IActionResult EstimateProValidation()
-        {
-            throw new NotImplementedException();
-
-        }
-
-        [Authorize]
-        public IActionResult EstimateClientValidation()
-        {
-            throw new NotImplementedException();
-
-        }
-        [Authorize]
-        public IActionResult BillValidation()
-        {
-            throw new NotImplementedException();
-
-        }
-        [Authorize]
-        public IActionResult BillAcquitment()
-        {
-            throw new NotImplementedException();
-        }
     }
 }

src/Yavsc.Org/Helpers/TeXHelpers.cs

@@ -1,198 +0,0 @@
-using System.Diagnostics;
-using Microsoft.AspNetCore.Html;
-using Microsoft.AspNetCore.Mvc;
-using Microsoft.AspNetCore.Mvc.Rendering;
-using Microsoft.AspNetCore.Mvc.ViewEngines;
-
-namespace Yavsc.Helpers
-{
-    using Microsoft.AspNetCore.Mvc.Infrastructure;
-    using ViewModels.Gen;
-    public class TeXString : HtmlString
-    {
-
-        public TeXString(TeXString teXString): base(teXString.ToString())
-        {
-        }
-
-        public TeXString(string str) : base(str)
-        {
-
-
-        }
-
-        public static TeXString operator+ (TeXString a, TeXString b) {
-            return new TeXString(a.ToString()+b.ToString());
-        }
-
-    }
-    public class Replacement
-        {
-            string target;
-            string replacement;
-            public Replacement(string target, string replacement)
-            {
-                this.target = target;
-                this.replacement = replacement;
-            }
-            public string Execute(string source)
-            {
-                return source?.Replace(target, replacement) ?? null;
-            }
-        }
-    public static class TeXHelpers
-    {
-        public static readonly  Replacement[] SpecialCharsDefaultRendering =
-        {
-            new Replacement("<","\\textless"),
-            new Replacement(">","\\textgreater"),
-            new Replacement("©","\\copyright"),
-            new Replacement("®","\\textregistered"),
-            new Replacement("\\","\\textbackslash"),
-            new Replacement("™","\\texttrademark"),
-            new Replacement("¶","\\P"),
-            new Replacement("|","\\textbar"),
-            new Replacement("%","\\%"),
-            new Replacement("{","\\{"),
-            new Replacement("}","\\}"),
-            new Replacement("_","\\_"),
-            new Replacement("#","\\#"),
-            new Replacement("$","\\$"),
-            new Replacement("_","\\_"),
-            new Replacement("¿","\\textquestiondown"),
-            new Replacement("§","\\S"),
-            new Replacement("£","\\pounds"),
-            new Replacement("&","\\&"),
-            new Replacement("¡","\\textexclamdown"),
-            new Replacement("†","\\dag"),
-            new Replacement("–","\\textendash"),
-            new Replacement("°","\\textdegree")
-        };
-
-         public static TeXString ToTeX(this string source, string defaultValue="\\textit{néant}")
-        {
-            if (source==null) return new TeXString(defaultValue);
-            string result=source;
-            foreach (var r in SpecialCharsDefaultRendering)
-            {
-                result = r.Execute(result);
-            }
-            return new TeXString(result);
-        }
-
-        public static TeXString ToTeXCell(this string source, string defaultValue="\\textit{néant}")
-        {
-            if (source==null) return new TeXString(defaultValue);
-            string result=source;
-            foreach (var r in SpecialCharsDefaultRendering)
-            {
-                result = r.Execute(result);
-            }
-            result = result.Replace("\n","\\tabularnewline ");
-            return new TeXString(result);
-        }
-
-
-        public static string NewLinesWith(this string target, string separator)
-        {
-            var items = target.Split(new char[] { '\n' }).Where(
-                s => !string.IsNullOrWhiteSpace(s));
-
-            return string.Join(separator, items);
-        }
-
-        public static TeXString ToTeXLines(this string source, string defaultValue, string lineSeparator = "\n\\\\")
-        {
-            if (source == null) return new TeXString(defaultValue);
-            return new TeXString( source.ToTeX().ToString().NewLinesWith(lineSeparator) );
-        }
-
-        public static TeXString SplitAddressToTeX (this string source, string lineSeparator = "\n\\\\", string defaultValue = "\\textit{pas d'adresse postale}")
-        {
-            if (string.IsNullOrWhiteSpace(source)) return new TeXString(defaultValue);
-            var alines = source.Split(',');
-            var texlines = alines.Select(l=>l.ToTeX().ToString());
-            return new TeXString(string.Join(lineSeparator,texlines));
-        }
-
-        public static bool GenerateEstimatePdf(this SiteSettings settings, PdfGenerationViewModel Model)
-        {
-            string errorMsg = null;
-            var billdir = Model.DestDir;
-            var tempdir = settings.TempDir;
-            string name = Model.BaseFileName;
-            string fullname = new FileInfo(
-                 System.IO.Path.Combine(tempdir, name)).FullName;
-            string ofullname = new FileInfo(
-                 System.IO.Path.Combine(billdir, name)).FullName;
-
-            FileInfo fi = new FileInfo(fullname + ".tex");
-            FileInfo fo = new FileInfo(ofullname + ".pdf");
-            using (StreamWriter sw = new StreamWriter(fi.FullName))
-            {
-                sw.Write(Model.TeXSource);
-            }
-            if (!fi.Exists)
-            {
-                errorMsg = "Source write failed";
-            }
-            else
-            {
-                using (Process p = new Process())
-                {
-                    p.StartInfo.WorkingDirectory = tempdir;
-                    p.StartInfo = new ProcessStartInfo
-                    {
-                        UseShellExecute = false,
-                        WorkingDirectory = tempdir,
-                        FileName = "/usr/bin/texi2pdf",
-                        Arguments = $"--batch --build-dir=. -o {fo.FullName} {fi.FullName}"
-                    };
-                    p.Start();
-                    p.WaitForExit();
-                    if (p.ExitCode != 0)
-                    {
-                        errorMsg = $"Pdf generation failed with exit code: {p.ExitCode}";
-                    }
-                    else
-                    {
-                      fi.Delete();
-                      var di = new DirectoryInfo(Path.Combine(tempdir,$"{Model.BaseFileName}.t2d"));
-                      di.Delete(true);
-
-                    }
-                }
-            }
-            Model.Generated = fo.Exists;
-            Model.GenerationErrorMessage = new HtmlString(errorMsg);
-            return fo.Exists;
-        }
-
-        public static string RenderViewToString(
-            this Controller controller, IViewEngine engine,
-            IActionContextAccessor contextAccessor,
-         string viewName, object model, bool isMainPage = true)
-        {
-            using (var sw = new StringWriter())
-            {
-                if (engine == null)
-                    throw new InvalidOperationException("no engine");
-
-                // try to find the specified view
-                controller.TryValidateModel(model);
-                ViewEngineResult viewResult = engine.FindView(contextAccessor.ActionContext, viewName, isMainPage);
-
-                // create the associated context
-                ViewContext viewContext = new ViewContext();
-                viewContext.ActionDescriptor = contextAccessor.ActionContext.ActionDescriptor;
-                viewContext.HttpContext = contextAccessor.ActionContext.HttpContext;
-                viewContext.TempData = controller.TempData;
-                viewContext.View = viewResult.View;
-                viewContext.Writer = sw;
-                // write the render view with the given context to the stringwriter
-                viewResult.View.RenderAsync(viewContext).Wait();
-                return sw.GetStringBuilder().ToString();
-            }
-        }
-    }
-}

src/Yavsc.Org/ViewComponents/BillViewComponent.cs

@@ -1,108 +0,0 @@
-
-using Microsoft.AspNetCore.Mvc;
-using Microsoft.Extensions.Localization;
-using Yavsc.Billing;
-using Yavsc.Helpers;
-using Yavsc.Models;
-using Yavsc.ViewModels;
-using Yavsc.ViewModels.Gen;
-using Yavsc.Services;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.Options;
-
-namespace Yavsc.ViewComponents
-{
-    public class BillViewComponent : ViewComponent
-    {
-        readonly ApplicationDbContext dbContext;
-        readonly IBillingService billing;
-        readonly IStringLocalizer<BillViewComponent> localizer;
-        private readonly SiteSettings siteSettings;
-
-        public BillViewComponent(ApplicationDbContext dbContext,
-            IStringLocalizer<BillViewComponent> localizer,
-            IBillingService billing,
-            IOptions<SiteSettings> siteSettings)
-        {
-            this.billing = billing;
-            this.dbContext = dbContext;
-            this.localizer = localizer;
-            this.siteSettings = siteSettings.Value;
-        }
-
-        public async Task<IViewComponentResult> InvokeAsync(
-            string code,
-            IBillable billable,
-            OutputFormat format,
-            bool asBill,
-            SiteSettings settings
-        )
-        {
-            var di = new DirectoryInfo(settings.Bills);
-            var dia = new DirectoryInfo(settings.Avatars);
-            ViewBag.BillsDir = di.FullName;
-            ViewBag.AvatarsDir = dia.FullName;
-            ViewBag.AsBill = asBill; // vrai pour une facture, sinon, c'est un devis
-            ViewBag.Acquitted = billable.GetIsAcquitted();
-
-            ViewBag.BillingCode = code;
-            var client = await dbContext.Users
-            .Include(u=>u.PostalAddress)
-            .SingleAsync(u=>u.Id == billable.ClientId);
-            ViewBag.Client = client;
-            var performer = await dbContext.Users
-            .Include(u=>u.BankInfo)
-            .Include(u=>u.PostalAddress)
-            .SingleAsync(u=>u.Id == billable.PerformerId);
-            ViewBag.Performer = performer;
-            string clientAddress = client.PostalAddress?.Address ?? null;
-            ViewBag.ClientAddress = clientAddress.SplitAddressToTeX();
-
-
-            var profile = await dbContext.Performers
-            .Include(p=>p.OrganizationAddress)
-            .SingleAsync(p=>p.PerformerId == billable.PerformerId);
-            ViewBag.PerformerProfile = profile;
-            ViewBag.ActivityLabel = (await dbContext.Activities.SingleAsync(a => a.Code == billable.ActivityCode)).Name;
-
-            var proAddr = profile.OrganizationAddress.Address;
-            ViewBag.PerformerOrganizationAddress = proAddr.SplitAddressToTeX() ;
-            ViewBag.FooterPerformerOrganizationAddress = proAddr.SplitAddressToTeX(", ");
-
-            ViewBag.PerformerAddress = performer.PostalAddress?.Address.SplitAddressToTeX() ;
-            switch (format) {
-                case OutputFormat.LaTeX :
-                    return this.View("Bill_tex", billable);
-                case OutputFormat.Pdf :
-                    string tex = null;
-                    var oldWriter = ViewComponentContext.ViewContext.Writer;
-                    using (var writer = new StringWriter())
-                    {
-                        this.ViewComponentContext.ViewContext.Writer = writer;
-                        var resultTex = View("Bill_tex", billable);
-                        await resultTex.ExecuteAsync(this.ViewComponentContext);
-                        tex = writer.ToString();
-                    }
-                    ViewComponentContext.ViewContext.Writer = oldWriter;
-
-                    var pdfGenerationViewModel = new PdfGenerationViewModel
-                    {
-                            Temp = siteSettings.TempDir,
-                            TeXSource = tex,
-                            DestDir = siteSettings.Bills,
-                            BaseFileName = billable.GetFileBaseName(billing)
-                        };
-                    if (settings.GenerateEstimatePdf(pdfGenerationViewModel)) {
-                        return this.View(new { Generated = pdfGenerationViewModel.BaseFileName+".pdf" });
-                    } else {
-                        return View(new { Error = pdfGenerationViewModel.GenerationErrorMessage } );
-                    }
-            }
-            ViewBag.BillFileInfo =  billable.GetBillInfo(billing, siteSettings);
-            ViewBag.Settings = settings;
-            return View("Default",billable);
-
-        }
-
-    }
-}

src/Yavsc.Org/Views/Shared/Components/Bill/Bill_pdf.cshtml

@@ -1,21 +0,0 @@
-@using System.Reflection
-@using System.IO
-@using Microsoft.Extensions.WebEncoders
-@using System.Diagnostics
-@using System.Text
-@using Yavsc.Helpers
-@model Yavsc.ViewModels.Gen.PdfGenerationViewModel
-
-@{
-  ViewBag.Settings.GenerateEstimatePdf(Model);
-}
-@if (Model.Generated) {
-  <div>
-  @(Model.BaseFileName).pdf was generated
-  </div>
-} else {
-  <div class="error">
-  @Model.GenerationErrorMessage
-  <p>Something went wrong ...</p>
-  </div>
-}

src/Yavsc.Org/Views/Shared/Components/Bill/Default.cshtml

@@ -1,33 +0,0 @@
-
-@model IBillable
-<div class="bill">
-@if (ViewBag.BillFileInfo.Exists) {
-<a class="btn btn-link" href="~/api/bill/facture-@(ViewBag.BillingCode)-@(Model.Id).pdf" >La facture au format Pdf</a>
-} else {
-<script>
-var onGenerate = function () {
-    var _btn = "this";
-    $.post('/api/bill/genpdf/@ViewBag.BillingCode/@Model.Id')
-    .done(function(data){
-        var res = JSON.parse(data);
-        window.location.href = '/api/bill/' + res.Generated;
-        _btn.disabled = "true";
-    })
-    .fail(function( jqXHR, textStatus, errorThrown ) {
-        $('#billgenerr').html('<em>La génération a échoué</em><p>'+textStatus+'</p>')
-    })
-};
-
-$(document).ready(function(){$('#btnGen').on('click',onGenerate)})
-
-</script>
-<div id="billgen">
-<form action= method="POST">
-    <input id="btnGen" class="btn btn-primary" type="button" onclick="onGenerate" value="Générer la facture au format Pdf" />
-
-<div id="billgenerr" class="error">
-</div>
-</form>
-</div>
-}
-</div>

src/Yavsc.Org/Views/Shared/Components/Estimate/Default.cshtml

@@ -1,13 +0,0 @@
-
-@model Estimate
-<div class="estimate">
-
-<a href="~/api/pdfbill/estimate-@(Model.Id).tex" >Export au format LaTeX</a>
-
-
-<form action="~/api/pdfbill/gen/@Model.Id" method="POST">
-    <input type="submit" value="Générer le Pdf"/>
-</form>
-
-<a href="~/api/pdfbill/get/@(Model.Id)" >Télécharger le document généré</a>
-</div>

src/Yavsc.Org/Views/Shared/Components/Estimate/Estimate_pdf.cshtml

@@ -1,21 +0,0 @@
-@using System.Reflection
-@using System.IO
-@using Microsoft.Extensions.WebEncoders
-@using System.Diagnostics
-@using System.Text
-@using Yavsc.Helpers
-@model Yavsc.ViewModels.Gen.PdfGenerationViewModel
-
-@{ 
-  SiteSettings.Value.GenerateEstimatePdf(Model);
-}
-@if (Model.Generated) {
-  <div>
-  @(Model.BaseFileName).pdf was generated
-  </div>
-} else {
-  <div class="error">
-  @Model.GenerationErrorMessage
-  <p>Something went wrong ...</p>
-  </div>
-}

src/Yavsc.Org/Yavsc.Org.csproj

@@ -9,8 +9,8 @@
     <RepositoryUrl>https://github.com/pazof/yavsc</RepositoryUrl>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="DotMarkdown" />
@@ -47,4 +47,4 @@
     <ProjectReference Include="../Yavsc.Server/Yavsc.Server.csproj" />
     <ProjectReference Include="../Yavsc.Abstract/Yavsc.Abstract.csproj" />
   </ItemGroup>
-</Project>
+</Project>

src/Yavsc.Server/Helpers/FileSystemHelpers.cs

@@ -34,7 +34,7 @@ namespace Yavsc.Server.Helpers
         {
             var item = new FileReceivedInfo(
                 settings.Bills,
-                AbstractFileSystemHelpers.SignFileNameFormat("pro", billingCode, estimateId));
+                AbstractFileSystemHelpers.SignFileNameFormat(signType, billingCode, estimateId));
 
             var fi = new FileInfo(item.FullName);
             if (fi.Exists) item.Overridden = true;

src/Yavsc.Server/Models/Billing/Estimate.cs

@@ -8,6 +8,7 @@ namespace Yavsc.Models.Billing
 {
     using Models.Workflow;
     using Newtonsoft.Json;
+    using System.Linq;
 
     public partial class Estimate : IEstimate
     {
@@ -78,14 +79,39 @@ namespace Yavsc.Models.Billing
         public DateTime ClientValidationDate { get; set; }
 
         /// <summary>
-        /// All signatures captured against this estimate, in
-        /// capture order. Multiple versions per (Type, SignerId)
-        /// are allowed; the controller reads the most recent
-        /// when asked. See <see cref="Signature"/>.
+        /// All signatures captured against this estimate, keyed by
+        /// <see cref="SignatureType"/>. The persister upserts by
+        /// (EstimateId, Type), so there is at most one row per type.
+        /// This collection is the persisted shape and stays
+        /// <c>[JsonIgnore]</c>: the wire payload exposes signatures
+        /// only through the dedicated <see cref="SignaturePro"/> and
+        /// <see cref="SignatureClient"/> projections, since an
+        /// estimate has exactly these two signature slots and never
+        /// more. See <see cref="Signature"/>.
         /// </summary>
         [InverseProperty(nameof(Signature.Estimate))]
+        [JsonIgnore, System.Text.Json.Serialization.JsonIgnore]
         public virtual ICollection<Signature> Signatures { get; set; }
             = new List<Signature>();
 
+        /// <summary>
+        /// The provider's signature on this estimate, or null when the
+        /// provider has not signed. Projected from
+        /// <see cref="Signatures"/>; not mapped (the table is
+        /// <see cref="Signatures"/>).
+        /// </summary>
+        [NotMapped]
+        public Signature? SignaturePro
+            => Signatures?.FirstOrDefault(s => s.Type == SignatureType.Pro);
+
+        /// <summary>
+        /// The client's signature on this estimate, or null when the
+        /// client has not signed. Projected from
+        /// <see cref="Signatures"/>; not mapped.
+        /// </summary>
+        [NotMapped]
+        public Signature? SignatureClient
+            => Signatures?.FirstOrDefault(s => s.Type == SignatureType.Client);
+
     }
 }

src/Yavsc.Server/Models/Billing/Signature.cs

@@ -31,7 +31,7 @@ public class Signature
 
     public long EstimateId { get; set; }
 
-    [ForeignKey(nameof(EstimateId)), JsonIgnore]
+    [ForeignKey(nameof(EstimateId)), JsonIgnore, System.Text.Json.Serialization.JsonIgnore]
     public virtual Estimate Estimate { get; set; }
 
     /// <summary>
@@ -48,7 +48,7 @@ public class Signature
     [Required]
     public string SignerId { get; set; }
 
-    [ForeignKey(nameof(SignerId)), JsonIgnore]
+    [ForeignKey(nameof(SignerId)), JsonIgnore, System.Text.Json.Serialization.JsonIgnore]
     public virtual ApplicationUser Signer { get; set; }
 
     public SignatureType Type { get; set; }

src/Yavsc.Server/Yavsc.Server.csproj

@@ -9,8 +9,8 @@
     <Library>true</Library>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Anthropic.SDK" />

src/Yavsc.Tests.Shared/Yavsc.Tests.Shared.csproj

@@ -14,8 +14,8 @@
     -->
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Hosting" />

src/cli/cli.csproj

@@ -7,8 +7,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <AssemblyVersion>1.1.0.0</AssemblyVersion>
     <FileVersion>1.1.0.0</FileVersion>
-    <InformationalVersion>1.1.0-feat-sign-estimate.1+306.Branch.feat-sign-estimate.Sha.e9a33695b38154859729b61d1280e596f1597acf</InformationalVersion>
-    <Version>1.1.0-feat-sign-estimate.1</Version>
+    <InformationalVersion>1.1.0-estimate.1+343.Branch.feature-estimate.Sha.ba40698cc9562f0f4ad2dcad4dd20e638c05b07d</InformationalVersion>
+    <Version>1.1.0-estimate.1</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Razor" />