feat(account): enable native account management and register API Identity services

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/PostIt/PostIt.Tests/HomePageProviderFlowTests.cs

@@ -1,3 +1,4 @@
+using Yavsc.Abstract.Identity;
 using PostIt.ViewModels;
 
 namespace PostIt.Tests;
@@ -12,4 +13,157 @@ public class HomePageProviderFlowTests
         Assert.NotNull(vm.OpenProviderRequests);
         Assert.True(vm.OpenProviderRequests.CanExecute(null));
     }
+
+    [Fact]
+    public void HomePage_exposes_profile_command()
+    {
+        var vm = new HomePageViewModel();
+
+        Assert.NotNull(vm.OpenProfile);
+        Assert.True(vm.OpenProfile.CanExecute(null));
+    }
+
+    [Fact]
+    public void HomePage_exposes_performer_configuration_command()
+    {
+        var vm = new HomePageViewModel();
+
+        Assert.NotNull(vm.OpenPerformerConfiguration);
+        Assert.True(vm.OpenPerformerConfiguration.CanExecute(null));
+    }
+
+    [Fact]
+    public void HomePage_exposes_administration_command()
+    {
+        var vm = new HomePageViewModel();
+
+        Assert.NotNull(vm.OpenAdministration);
+        Assert.True(vm.OpenAdministration.CanExecute(null));
+    }
+
+    [Fact]
+    public void Administration_page_filters_users_by_search_text()
+    {
+        var vm = new AdministrationPageViewModel();
+        vm.Users.Add(new Yavsc.Abstract.Identity.UserInfo { UserId = "1", UserName = "alice", FullName = "Alice Example" });
+        vm.Users.Add(new Yavsc.Abstract.Identity.UserInfo { UserId = "2", UserName = "bob", FullName = "Bob Jones" });
+        vm.Users.Add(new Yavsc.Abstract.Identity.UserInfo { UserId = "3", UserName = "carol", FullName = "Carol Smith" });
+
+        vm.SearchText = "ali";
+
+        Assert.Single(vm.FilteredUsers);
+        Assert.Equal("alice", vm.FilteredUsers[0].UserName);
+    }
+
+    [Fact]
+    public void Administration_page_filters_users_by_full_name()
+    {
+        var vm = new AdministrationPageViewModel();
+        vm.Users.Add(new Yavsc.Abstract.Identity.UserInfo { UserId = "1", UserName = "alice", FullName = "Alice Example" });
+        vm.Users.Add(new Yavsc.Abstract.Identity.UserInfo { UserId = "2", UserName = "bob", FullName = "Bob Jones" });
+
+        vm.SearchText = "example";
+
+        Assert.Single(vm.FilteredUsers);
+        Assert.Equal("alice", vm.FilteredUsers[0].UserName);
+    }
+
+    [Fact]
+    public void UserProfilePage_exposes_full_name_and_address_fields()
+    {
+        var vm = new UserProfilePageViewModel();
+
+        Assert.Equal("—", vm.FullName);
+        Assert.Equal("—", vm.Address);
+        Assert.Equal("Non configuré", vm.DedicatedGoogleCalendar);
+        Assert.Equal("Aucune information bancaire", vm.BankInfoSummary);
+        Assert.NotNull(vm.RefreshCommand);
+    }
+
+    [Fact]
+    public void ProfileUpdateRequest_allows_username_updates()
+    {
+        var request = new ProfileUpdateRequest
+        {
+            UserName = "alice.new"
+        };
+
+        Assert.Equal("alice.new", request.UserName);
+    }
+
+    [Fact]
+    public void UserProfilePage_can_save_profile_values()
+    {
+        var vm = new UserProfilePageViewModel
+        {
+            UserName = "alice.new",
+            FullName = "Alice Example",
+            Address = "14 rue de l’Érable",
+            DedicatedGoogleCalendar = "calendar-123",
+            BankInfoSummary = "FR14 2004 1010 0505 0001 3M02 606"
+        };
+
+        Assert.NotNull(vm.SaveProfileCommand);
+        Assert.False(vm.SaveProfileCommand.CanExecute(null));
+    }
+
+    [Fact]
+    public void UserProfilePage_builds_profile_payload_for_calendar_and_bank_values()
+    {
+        var vm = new UserProfilePageViewModel
+        {
+            UserName = "alice.new",
+            FullName = "Alice Example",
+            Address = "14 rue de l’Érable",
+            DedicatedGoogleCalendar = "calendar-123",
+            BankInfoSummary = "FR14 2004 1010 0505 0001 3M02 606"
+        };
+
+        var payload = vm.BuildProfileUpdateRequest();
+
+        Assert.Equal("alice.new", payload.UserName);
+        Assert.Equal("calendar-123", payload.GoogleCalendarId);
+        Assert.Null(payload.BankInfoSummary);
+    }
+
+    [Fact]
+    public void UserProfilePage_turns_placeholder_values_into_empty_payload_fields()
+    {
+        var vm = new UserProfilePageViewModel
+        {
+            UserName = "alice.new",
+            FullName = "Alice Example",
+            Address = "14 rue de l’Érable",
+            DedicatedGoogleCalendar = "Non configuré",
+            BankInfoSummary = "Aucune information bancaire"
+        };
+
+        var payload = vm.BuildProfileUpdateRequest();
+
+        Assert.Equal(string.Empty, payload.GoogleCalendarId);
+        Assert.Null(payload.BankInfoSummary);
+    }
+
+    [Fact]
+    public void PerformerConfigurationPage_preserves_current_user_id_in_save_payload()
+    {
+        var vm = new PerformerConfigurationPageViewModel
+        {
+            PerformerId = "user-42",
+            UserName = "alice",
+            ExerciseCountryCode = "fr",
+            SIREN = "123456789",
+            Website = "https://example.com",
+            Active = true,
+            AcceptNotifications = true,
+            AcceptPublicContact = true,
+            UseGeoLocalizationToReduceDistanceWithClients = true
+        };
+
+        var payload = vm.BuildPerformerProfileSettings();
+
+        Assert.Equal("user-42", payload.PerformerId);
+        Assert.Equal("alice", payload.UserName);
+        Assert.Equal("fr", payload.ExerciseCountryCode);
+    }
 }

src/PostIt/PostIt.Tests/ResourceUsageApiClientTests.cs

@@ -0,0 +1,117 @@
+using System.Net.Http;
+using System.Text.Json;
+using Yavsc.Abstract.Resources;
+using Yavsc.Api.Client;
+
+namespace PostIt.Tests;
+
+public class ResourceUsageApiClientTests
+{
+    [Fact]
+    public async Task GetCurrentAsync_calls_user_usage_endpoint()
+    {
+        var fake = new FakeYavscApiClient();
+        var client = new ResourceUsageApiClient(fake, "https://example.invalid/api/v1/");
+
+        var usage = await client.GetCurrentAsync();
+
+        Assert.Equal("https://example.invalid/api/v1/resource-usage/me", fake.LastPath);
+        Assert.Equal("GET", fake.LastMethod);
+        Assert.Equal(12.5m, usage.ApiCalls);
+        Assert.Equal(3.2m, usage.CpuSeconds);
+    }
+
+    [Fact]
+    public async Task GetAdminOverviewAsync_calls_admin_usage_endpoint()
+    {
+        var fake = new FakeYavscApiClient();
+        var client = new ResourceUsageApiClient(fake, "https://example.invalid/api/v1/");
+
+        var usage = await client.GetAdminOverviewAsync();
+
+        Assert.Equal("https://example.invalid/api/v1/resource-usage/admin", fake.LastPath);
+        Assert.Equal("GET", fake.LastMethod);
+        Assert.Equal(2, usage.Count);
+        Assert.Equal("administrator", usage[0].UserName);
+    }
+
+    private sealed class FakeYavscApiClient : IYavscApiClient
+    {
+        public HttpClient Http { get; } = new();
+        public string? LastPath { get; private set; }
+        public string? LastMethod { get; private set; }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastMethod = method.Method;
+            LastPath = path;
+
+            if (typeof(T) == typeof(ResourceUsageSummary))
+            {
+                var summary = new ResourceUsageSummary
+                {
+                    UserId = "user-42",
+                    UserName = "alice",
+                    ApiCalls = 12.5m,
+                    CpuSeconds = 3.2m,
+                    BandwidthMb = 18.4m,
+                    StorageMb = 51.2m,
+                    EstimatedCompensation = 4.9m,
+                    Currency = "EUR",
+                    RecordedAtUtc = DateTimeOffset.UtcNow
+                };
+
+                return Task.FromResult((T)(object)summary);
+            }
+
+            if (typeof(T) == typeof(List<ResourceUsageSummary>))
+            {
+                var list = new List<ResourceUsageSummary>
+                {
+                    new()
+                    {
+                        UserId = "admin-user",
+                        UserName = "administrator",
+                        ApiCalls = 90m,
+                        CpuSeconds = 14m,
+                        BandwidthMb = 500m,
+                        StorageMb = 2048m,
+                        EstimatedCompensation = 32m,
+                        Currency = "EUR",
+                        RecordedAtUtc = DateTimeOffset.UtcNow
+                    },
+                    new()
+                    {
+                        UserId = "user-99",
+                        UserName = "bob",
+                        ApiCalls = 40m,
+                        CpuSeconds = 7m,
+                        BandwidthMb = 120m,
+                        StorageMb = 600m,
+                        EstimatedCompensation = 15m,
+                        Currency = "EUR",
+                        RecordedAtUtc = DateTimeOffset.UtcNow
+                    }
+                };
+
+                return Task.FromResult((T)(object)list);
+            }
+
+            throw new NotSupportedException($"Unsupported type: {typeof(T).FullName}");
+        }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => throw new NotSupportedException();
+
+        public Task CallAsync(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+            => Task.CompletedTask;
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => Task.CompletedTask;
+
+        public Task<byte[]> DownloadAsync(HttpMethod method, string path, CancellationToken ct = default)
+            => Task.FromResult(Array.Empty<byte>());
+
+        public ValueTask DisposeAsync() => ValueTask.CompletedTask;
+    }
+}

src/PostIt/PostIt/Helpers/ServiceCollectionHelpers.cs

@@ -76,6 +76,9 @@ public static class ServiceCollectionHelpers
         services.AddTransient<EstimateListPage>();
         services.AddTransient<EstimateValidationPage>();
         services.AddTransient<MyFilesPage>();
+        services.AddTransient<UserProfilePage>();
+        services.AddTransient<PerformerConfigurationPage>();
+        services.AddTransient<AdministrationPage>();
         services.AddTransient<ResourceUsagePage>();
 
         // ViewModels
@@ -95,6 +98,9 @@ public static class ServiceCollectionHelpers
         services.AddSingleton<IUserDirectory>(userDirectory);
         services.AddSingleton<AboutPageViewModel>();
         services.AddSingleton<HomePageViewModel>();
+        services.AddTransient<UserProfilePageViewModel>();
+        services.AddTransient<PerformerConfigurationPageViewModel>();
+        services.AddTransient<AdministrationPageViewModel>();
         services.AddSingleton<SignaturePageViewModel>();
         services.AddSingleton<CirclesPageViewModel>();
         services.AddSingleton<ActivitiesPageViewModel>();

src/PostIt/PostIt/ViewLocator.cs

@@ -60,6 +60,9 @@ public class ViewLocator : IDataTemplate
             EstimateListPageViewModel => services.GetRequiredService<EstimateListPage>(),
             EstimateValidationPageViewModel => services.GetRequiredService<EstimateValidationPage>(),
             MyFilesViewModel => services.GetRequiredService<MyFilesPage>(),
+            UserProfilePageViewModel => services.GetRequiredService<UserProfilePage>(),
+            PerformerConfigurationPageViewModel => services.GetRequiredService<PerformerConfigurationPage>(),
+            AdministrationPageViewModel => services.GetRequiredService<AdministrationPage>(),
             ResourceUsagePageViewModel => services.GetRequiredService<ResourceUsagePage>(),
             ChatViewModel => services.GetRequiredService<ChatPage>(),
             null => new TextBlock { Text = "No view for <null>" },

src/PostIt/PostIt/ViewModels/AdministrationPageViewModel.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PostIt.Services;
+using Yavsc.Abstract.Identity;
+
+namespace PostIt.ViewModels;
+
+public partial class AdministrationPageViewModel : ViewModelBase
+{
+    private readonly YavscApiClient? _api;
+
+    [ObservableProperty]
+    public partial bool IsBusy { get; set; }
+
+    [ObservableProperty]
+    public partial ObservableCollection<UserInfo> Users { get; set; } = new();
+
+    [ObservableProperty]
+    public partial string SearchText { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string StatusMessage { get; set; } = "Chargement…";
+
+    public IReadOnlyList<UserInfo> FilteredUsers =>
+        string.IsNullOrWhiteSpace(SearchText)
+            ? Users.ToList()
+            : Users.Where(user =>
+                    (user.UserName ?? string.Empty).Contains(SearchText, StringComparison.OrdinalIgnoreCase)
+                 || (user.FullName ?? string.Empty).Contains(SearchText, StringComparison.OrdinalIgnoreCase)
+                 || (user.Email ?? string.Empty).Contains(SearchText, StringComparison.OrdinalIgnoreCase)
+                 || (user.UserId ?? string.Empty).Contains(SearchText, StringComparison.OrdinalIgnoreCase))
+                .ToList();
+
+    public override bool CanNavigateNext { get => false; protected set { _ = value; } }
+    public override bool CanNavigatePrevious { get => true; protected set { _ = value; } }
+
+    public AdministrationPageViewModel(YavscApiClient? api)
+    {
+        _api = api;
+    }
+
+    public AdministrationPageViewModel() : this(null) { }
+
+    public Task InitializeAsync() => RefreshAsync();
+
+    partial void OnSearchTextChanged(string value)
+    {
+        OnPropertyChanged(nameof(FilteredUsers));
+    }
+
+    [RelayCommand]
+    public async Task RefreshAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API d’administration indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var query = SearchText.Trim();
+            var usersEndpoint = string.IsNullOrWhiteSpace(query)
+                ? new Uri(new Uri(_api.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), "users").ToString()
+                : new Uri(new Uri(_api.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), $"users/search/{Uri.EscapeDataString(query)}").ToString();
+
+            var users = await _api.CallAsync<List<UserInfo>>(HttpMethod.Get, usersEndpoint).ConfigureAwait(true);
+
+            Users.Clear();
+            foreach (var user in users ?? [])
+            {
+                Users.Add(user);
+            }
+
+            OnPropertyChanged(nameof(FilteredUsers));
+            StatusMessage = Users.Count > 0 ? $"{Users.Count} utilisateur(s) chargé(s)." : "Aucun utilisateur trouvé.";
+        }
+        catch (Exception ex)
+        {
+            Users.Clear();
+            OnPropertyChanged(nameof(FilteredUsers));
+            StatusMessage = $"Accès administration refusé ou indisponible : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+}

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

@@ -36,6 +36,9 @@ public class HomePageViewModel : ViewModelBase
         OpenProviderEstimates = new AsyncRelayCommand(() => OpenEstimateListAsync(EstimateListPerspective.Provider));
         OpenBlogs = new AsyncRelayCommand(App.PushBlogsPageAsync);
         OpenMyFiles = new AsyncRelayCommand(OpenMyFilesAsync);
+        OpenProfile = new AsyncRelayCommand(OpenProfileAsync);
+        OpenPerformerConfiguration = new AsyncRelayCommand(OpenPerformerConfigurationAsync);
+        OpenAdministration = new AsyncRelayCommand(OpenAdministrationAsync);
         OpenResourceUsage = new AsyncRelayCommand(OpenResourceUsageAsync);
         OpenChat = new AsyncRelayCommand(OpenChatAsync);
     }
@@ -43,6 +46,9 @@ public class HomePageViewModel : ViewModelBase
 
     public IAsyncRelayCommand OpenChat { get; }
     public IAsyncRelayCommand OpenBlogs { get; }
+    public IAsyncRelayCommand OpenProfile { get; }
+    public IAsyncRelayCommand OpenPerformerConfiguration { get; }
+    public IAsyncRelayCommand OpenAdministration { get; }
     public IAsyncRelayCommand OpenResourceUsage { get; }
     public IAsyncRelayCommand OpenActivities { get; }
     public IAsyncRelayCommand OpenProviderRequests { get; }
@@ -140,6 +146,60 @@ public class HomePageViewModel : ViewModelBase
         await app.PushPageAsync(vm);
     }
 
+    private async Task OpenProfileAsync()
+    {
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+
+        var vm = app.ServiceProvider?.GetRequiredService<UserProfilePageViewModel>();
+        if (vm is null)
+        {
+            throw new InvalidOperationException("Page profil indisponible.");
+        }
+
+        await vm.InitializeAsync();
+        await app.PushPageAsync(vm);
+    }
+
+    private async Task OpenPerformerConfigurationAsync()
+    {
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+
+        var vm = app.ServiceProvider?.GetRequiredService<PerformerConfigurationPageViewModel>();
+        if (vm is null)
+        {
+            throw new InvalidOperationException("Page performer indisponible.");
+        }
+
+        await vm.InitializeAsync();
+        await app.PushPageAsync(vm);
+    }
+
+    private async Task OpenAdministrationAsync()
+    {
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+
+        var vm = app.ServiceProvider?.GetRequiredService<AdministrationPageViewModel>();
+        if (vm is null)
+        {
+            throw new InvalidOperationException("Page administration indisponible.");
+        }
+
+        await vm.InitializeAsync();
+        await app.PushPageAsync(vm);
+    }
+
     private async Task OpenResourceUsageAsync()
     {
         var app = (App?)Application.Current;

src/PostIt/PostIt/ViewModels/Layout/UserProfilePageViewModel.cs

@@ -0,0 +1,612 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Net.Http;
+using System.Text.Json;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PostIt.Services;
+using Yavsc.Abstract.Identity;
+
+namespace PostIt.ViewModels;
+
+public partial class UserProfilePageViewModel : ViewModelBase
+{
+    private readonly YavscApiClient? _api;
+    private readonly SessionStatusViewModel? _sessionStatus;
+
+    [ObservableProperty]
+    [NotifyCanExecuteChangedFor(nameof(SaveProfileCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SetMonthlyEmailPreferenceCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SetTwoFactorCommand))]
+    [NotifyCanExecuteChangedFor(nameof(ChangePasswordCommand))]
+    [NotifyCanExecuteChangedFor(nameof(AddBankAccountCommand))]
+    [NotifyCanExecuteChangedFor(nameof(DeleteBankAccountCommand))]
+    [NotifyCanExecuteChangedFor(nameof(RemoveExternalLoginCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SendEmailConfirmationCommand))]
+    [NotifyCanExecuteChangedFor(nameof(LoadCalendarsCommand))]
+    [NotifyCanExecuteChangedFor(nameof(ChooseCalendarCommand))]
+    [NotifyCanExecuteChangedFor(nameof(DeleteAccountCommand))]
+    public partial bool IsBusy { get; set; }
+
+    [ObservableProperty]
+    [NotifyCanExecuteChangedFor(nameof(SaveProfileCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SetMonthlyEmailPreferenceCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SetTwoFactorCommand))]
+    [NotifyCanExecuteChangedFor(nameof(ChangePasswordCommand))]
+    [NotifyCanExecuteChangedFor(nameof(AddBankAccountCommand))]
+    [NotifyCanExecuteChangedFor(nameof(DeleteBankAccountCommand))]
+    [NotifyCanExecuteChangedFor(nameof(RemoveExternalLoginCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SendEmailConfirmationCommand))]
+    [NotifyCanExecuteChangedFor(nameof(LoadCalendarsCommand))]
+    [NotifyCanExecuteChangedFor(nameof(ChooseCalendarCommand))]
+    [NotifyCanExecuteChangedFor(nameof(DeleteAccountCommand))]
+    public partial bool IsProfileLoaded { get; set; }
+
+    [ObservableProperty]
+    public partial string UserName { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string CurrentUserName { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string UserId { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string FullName { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string Email { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string Address { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string Avatar { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string Roles { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string DedicatedGoogleCalendar { get; set; } = "Non configuré";
+
+    [ObservableProperty]
+    public partial string BankInfoSummary { get; set; } = "Aucune information bancaire";
+
+    [ObservableProperty]
+    public partial string StatusMessage { get; set; } = "Prêt.";
+
+    [ObservableProperty]
+    public partial bool EmailConfirmed { get; set; }
+
+    [ObservableProperty]
+    public partial bool AllowMonthlyEmail { get; set; }
+
+    [ObservableProperty]
+    public partial bool HasPassword { get; set; }
+
+    [ObservableProperty]
+    public partial bool TwoFactorEnabled { get; set; }
+
+    [ObservableProperty]
+    public partial int ExternalLoginCount { get; set; }
+
+    [ObservableProperty]
+    public partial long PostsCounter { get; set; }
+
+    [ObservableProperty]
+    public partial long DiskUsage { get; set; }
+
+    [ObservableProperty]
+    public partial long DiskQuota { get; set; }
+
+    [ObservableProperty]
+    public partial decimal Credits { get; set; }
+
+    [ObservableProperty]
+    public partial string CurrentPassword { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string NewPassword { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string ConfirmPassword { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string BankIban { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string BankBic { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string BankCode { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string BankWicketCode { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string BankAccountNumber { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string UsernameConfirmation { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial int BankedKey { get; set; }
+
+    public ObservableCollection<BankAccountInfo> BankAccounts { get; } = [];
+    public ObservableCollection<LinkedExternalLogin> ExternalLogins { get; } = [];
+    public ObservableCollection<CalendarOption> Calendars { get; } = [];
+
+    public override bool CanNavigateNext { get => false; protected set { _ = value; } }
+    public override bool CanNavigatePrevious { get => true; protected set { _ = value; } }
+
+    public UserProfilePageViewModel(YavscApiClient? api, SessionStatusViewModel? sessionStatus = null)
+    {
+        _api = api;
+        _sessionStatus = sessionStatus;
+    }
+
+    public UserProfilePageViewModel() : this(null, null) { }
+
+    public Task InitializeAsync() => RefreshAsync();
+
+    [RelayCommand]
+    public async Task RefreshAsync()
+    {
+        if (_api is null)
+        {
+            IsProfileLoaded = false;
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        IsProfileLoaded = false;
+        try
+        {
+            var me = await _api.CallAsync<Me>(HttpMethod.Get, new Uri(new Uri(_api.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), "account/me").ToString()).ConfigureAwait(true);
+            if (me is null)
+            {
+                throw new InvalidOperationException("Le serveur a renvoyé un profil vide.");
+            }
+
+            UserName = me.UserName ?? "—";
+            CurrentUserName = UserName;
+            UserId = me.UserId;
+            FullName = me.FullName ?? "—";
+            Email = me.Email ?? "—";
+            Address = me.Address ?? "—";
+            Avatar = string.IsNullOrWhiteSpace(me.Avatar) ? "Aucun avatar" : me.Avatar;
+            Roles = me.Roles is { Length: > 0 } ? string.Join(", ", me.Roles) : "Aucun rôle";
+            DedicatedGoogleCalendar = string.IsNullOrWhiteSpace(me.DedicatedGoogleCalendar) ? "Non configuré" : me.DedicatedGoogleCalendar;
+            BankInfoSummary = string.IsNullOrWhiteSpace(me.BankInfoSummary) ? "Aucune information bancaire" : me.BankInfoSummary;
+            EmailConfirmed = me.EmailConfirmed;
+            AllowMonthlyEmail = me.AllowMonthlyEmail;
+            HasPassword = me.HasPassword;
+            TwoFactorEnabled = me.TwoFactorEnabled;
+            ExternalLoginCount = me.ExternalLoginCount;
+            PostsCounter = me.PostsCounter;
+            DiskUsage = me.DiskUsage;
+            DiskQuota = me.DiskQuota;
+            Credits = me.Credits;
+            BankAccounts.Clear();
+            foreach (var account in me.BankAccounts)
+            {
+                BankAccounts.Add(account);
+            }
+            ExternalLogins.Clear();
+            foreach (var login in me.ExternalLogins)
+            {
+                ExternalLogins.Add(login);
+            }
+            IsProfileLoaded = true;
+            StatusMessage = "Profil chargé.";
+        }
+        catch (Exception ex)
+        {
+            IsProfileLoaded = false;
+            UserName = "—";
+            CurrentUserName = "—";
+            UserId = "—";
+            FullName = "—";
+            Email = "—";
+            Address = "—";
+            Avatar = "—";
+            Roles = "—";
+            DedicatedGoogleCalendar = "Non configuré";
+            BankInfoSummary = "Aucune information bancaire";
+            EmailConfirmed = false;
+            AllowMonthlyEmail = false;
+            HasPassword = false;
+            TwoFactorEnabled = false;
+            ExternalLoginCount = 0;
+            PostsCounter = 0;
+            DiskUsage = 0;
+            DiskQuota = 0;
+            Credits = 0;
+            BankAccounts.Clear();
+            ExternalLogins.Clear();
+            Calendars.Clear();
+            StatusMessage = $"Impossible de charger le profil : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    public ProfileUpdateRequest BuildProfileUpdateRequest()
+    {
+        static string NormalizeField(string? value, string placeholder)
+        {
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                return string.Empty;
+            }
+
+            var trimmed = value.Trim();
+            return string.Equals(trimmed, placeholder, StringComparison.OrdinalIgnoreCase)
+                ? string.Empty
+                : trimmed;
+        }
+
+        return new ProfileUpdateRequest
+        {
+            UserName = NormalizeField(UserName, "—"),
+            FullName = NormalizeField(FullName, "—"),
+            Address = NormalizeField(Address, "—"),
+            GoogleCalendarId = NormalizeField(DedicatedGoogleCalendar, "Non configuré")
+        };
+    }
+
+    private bool CanSaveProfile() => _api is not null && IsProfileLoaded && !IsBusy;
+
+    [RelayCommand(CanExecute = nameof(CanSaveProfile))]
+    public async Task SaveProfileAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var payload = BuildProfileUpdateRequest();
+
+            var endpoint = new Uri(new Uri(_api.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), "account/me").ToString();
+            await _api.CallAsync(HttpMethod.Put, endpoint, payload).ConfigureAwait(true);
+            StatusMessage = "Profil enregistré.";
+            await RefreshAsync().ConfigureAwait(true);
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible d’enregistrer le profil : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task SetMonthlyEmailPreferenceAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        await UpdateBooleanPreferenceAsync(
+            "account/preferences/monthly-email",
+            new MonthlyEmailPreferenceRequest { Enabled = AllowMonthlyEmail },
+            enabled => AllowMonthlyEmail = enabled,
+            "préférence de courriel");
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task SetTwoFactorAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        await UpdateBooleanPreferenceAsync(
+            "account/security/two-factor",
+            new TwoFactorRequest { Enabled = TwoFactorEnabled },
+            enabled => TwoFactorEnabled = enabled,
+            "authentification à deux facteurs");
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task ChangePasswordAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        if (string.IsNullOrWhiteSpace(NewPassword)
+            || !string.Equals(NewPassword, ConfirmPassword, StringComparison.Ordinal))
+        {
+            StatusMessage = "Le nouveau mot de passe et sa confirmation doivent être identiques.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var endpoint = BuildEndpoint("account/security/password");
+            await _api.CallAsync(HttpMethod.Put, endpoint, new ChangePasswordRequest
+            {
+                CurrentPassword = CurrentPassword,
+                NewPassword = NewPassword,
+                ConfirmPassword = ConfirmPassword
+            }).ConfigureAwait(true);
+            CurrentPassword = string.Empty;
+            NewPassword = string.Empty;
+            ConfirmPassword = string.Empty;
+            HasPassword = true;
+            StatusMessage = "Mot de passe mis à jour.";
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible de modifier le mot de passe : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task AddBankAccountAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        if (string.IsNullOrWhiteSpace(BankIban) && string.IsNullOrWhiteSpace(BankBic))
+        {
+            StatusMessage = "Renseignez un IBAN ou un BIC.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var endpoint = BuildEndpoint("account/bank-info");
+            await _api.CallAsync<BankAccountInfo>(HttpMethod.Post, endpoint, new BankAccountInfoRequest
+            {
+                IBAN = BankIban.Trim(),
+                BIC = BankBic.Trim(),
+                BankCode = BankCode.Trim(),
+                WicketCode = BankWicketCode.Trim(),
+                AccountNumber = BankAccountNumber.Trim(),
+                BankedKey = BankedKey
+            }).ConfigureAwait(true);
+            BankIban = string.Empty;
+            BankBic = string.Empty;
+            BankCode = string.Empty;
+            BankWicketCode = string.Empty;
+            BankAccountNumber = string.Empty;
+            BankedKey = 0;
+            await RefreshAsync().ConfigureAwait(true);
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible d’ajouter le compte bancaire : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task DeleteBankAccountAsync(BankAccountInfo? account)
+    {
+        if (_api is null || account is null)
+        {
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            await _api.CallAsync(HttpMethod.Delete, BuildEndpoint($"account/bank-info/{account.Id}")).ConfigureAwait(true);
+            await RefreshAsync().ConfigureAwait(true);
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible de supprimer le compte bancaire : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task RemoveExternalLoginAsync(LinkedExternalLogin? login)
+    {
+        if (_api is null || login is null)
+        {
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var query = $"provider={Uri.EscapeDataString(login.Provider)}&providerKey={Uri.EscapeDataString(login.ProviderKey)}";
+            await _api.CallAsync(HttpMethod.Delete, BuildEndpoint($"account/security/external-logins?{query}")).ConfigureAwait(true);
+            await RefreshAsync().ConfigureAwait(true);
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible de supprimer cette connexion externe : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task SendEmailConfirmationAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            await _api.CallAsync<JsonElement>(HttpMethod.Post, BuildEndpoint("account/email/confirmation")).ConfigureAwait(true);
+            StatusMessage = "E-mail de confirmation envoyé.";
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible d’envoyer l’e-mail de confirmation : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task LoadCalendarsAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var calendars = await _api.CallAsync<CalendarOption[]>(
+                HttpMethod.Get,
+                BuildEndpoint("account/calendars")).ConfigureAwait(true);
+            Calendars.Clear();
+            foreach (var calendar in calendars ?? [])
+            {
+                Calendars.Add(calendar);
+            }
+
+            StatusMessage = Calendars.Count == 0
+                ? "Aucun agenda Google dont vous êtes propriétaire n’est disponible."
+                : "Agendas Google chargés.";
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible de charger les agendas Google : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task ChooseCalendarAsync(CalendarOption? calendar)
+    {
+        if (calendar is null)
+        {
+            DedicatedGoogleCalendar = "Non configuré";
+        }
+        else
+        {
+            DedicatedGoogleCalendar = calendar.Id;
+        }
+
+        await SaveProfileAsync().ConfigureAwait(true);
+    }
+
+    [RelayCommand(CanExecute = nameof(CanModifyAccount))]
+    public async Task DeleteAccountAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de profil indisponible.";
+            return;
+        }
+
+        if (!string.Equals(UsernameConfirmation, CurrentUserName, StringComparison.Ordinal))
+        {
+            StatusMessage = "Saisissez exactement votre nom d’utilisateur pour confirmer la suppression.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            await _api.CallAsync(HttpMethod.Delete, BuildEndpoint("account/me"), new DeleteAccountRequest
+            {
+                UsernameConfirmation = UsernameConfirmation
+            }).ConfigureAwait(true);
+            UsernameConfirmation = string.Empty;
+            StatusMessage = "Compte supprimé.";
+
+            if (_sessionStatus is not null)
+            {
+                await _sessionStatus.LogoutAsync().ConfigureAwait(true);
+            }
+            else
+            {
+                await _api.LogoutAsync().ConfigureAwait(true);
+            }
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible de supprimer le compte : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    private async Task UpdateBooleanPreferenceAsync<TRequest>(
+        string path,
+        TRequest request,
+        Action<bool> applyValue,
+        string preferenceName)
+        where TRequest : class
+    {
+        IsBusy = true;
+        try
+        {
+            var endpoint = BuildEndpoint(path);
+            var response = await _api!.CallAsync<System.Text.Json.JsonElement>(HttpMethod.Put, endpoint, request).ConfigureAwait(true);
+            var enabled = response.GetProperty("enabled").GetBoolean();
+            applyValue(enabled);
+            StatusMessage = $"Préférence mise à jour : {preferenceName}.";
+        }
+        catch (Exception ex)
+        {
+            await RefreshAsync().ConfigureAwait(true);
+            StatusMessage = $"Impossible de mettre à jour {preferenceName} : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    private string BuildEndpoint(string path) =>
+        new Uri(new Uri(_api!.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), path).ToString();
+
+    private bool CanModifyAccount() => _api is not null && IsProfileLoaded && !IsBusy;
+}

src/PostIt/PostIt/ViewModels/PerformerConfigurationPageViewModel.cs

@@ -0,0 +1,196 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PostIt.Services;
+using Yavsc.Abstract.Workflow;
+using Yavsc.Api.Client;
+
+namespace PostIt.ViewModels;
+
+public partial class ActivitySelectionOption : ObservableObject
+{
+    public string Code { get; }
+    public string Name { get; }
+
+    [ObservableProperty]
+    public partial bool IsSelected { get; set; }
+
+    public ActivitySelectionOption(string code, string name)
+    {
+        Code = code;
+        Name = name;
+    }
+}
+
+public partial class PerformerConfigurationPageViewModel : ViewModelBase
+{
+    private readonly YavscApiClient? _api;
+    private readonly ActivityApiClient? _activityClient;
+
+    [ObservableProperty]
+    public partial bool IsBusy { get; set; }
+
+    [ObservableProperty]
+    public partial string PerformerId { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string UserName { get; set; } = "—";
+
+    [ObservableProperty]
+    public partial string ExerciseCountryCode { get; set; } = "fr";
+
+    [ObservableProperty]
+    public partial string SIREN { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string Website { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial bool Active { get; set; }
+
+    [ObservableProperty]
+    public partial bool AcceptNotifications { get; set; }
+
+    [ObservableProperty]
+    public partial bool AcceptPublicContact { get; set; }
+
+    [ObservableProperty]
+    public partial bool UseGeoLocalizationToReduceDistanceWithClients { get; set; }
+
+    [ObservableProperty]
+    public partial ObservableCollection<ActivitySelectionOption> AvailableActivities { get; set; } = new();
+
+    [ObservableProperty]
+    public partial string StatusMessage { get; set; } = "Prêt.";
+
+    public override bool CanNavigateNext { get => false; protected set { _ = value; } }
+    public override bool CanNavigatePrevious { get => true; protected set { _ = value; } }
+
+    public PerformerConfigurationPageViewModel(YavscApiClient? api, ActivityApiClient? activityClient)
+    {
+        _api = api;
+        _activityClient = activityClient;
+    }
+
+    public PerformerConfigurationPageViewModel() : this(null, null) { }
+
+    public Task InitializeAsync() => RefreshAsync();
+
+    [RelayCommand]
+    public async Task RefreshAsync()
+    {
+        if (_api is null || _activityClient is null)
+        {
+            StatusMessage = "Client API de configuration indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var endpoint = new Uri(new Uri(_api.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), "account/performer-profile").ToString();
+            var dto = await _api.CallAsync<PerformerProfileSettings>(HttpMethod.Get, endpoint).ConfigureAwait(true);
+
+            PerformerId = dto?.PerformerId ?? string.Empty;
+            UserName = dto?.UserName ?? "—";
+            ExerciseCountryCode = string.IsNullOrWhiteSpace(dto?.ExerciseCountryCode) ? "fr" : dto.ExerciseCountryCode;
+            SIREN = dto?.SIREN ?? string.Empty;
+            Website = dto?.WebSite ?? string.Empty;
+            Active = dto?.Active ?? false;
+            AcceptNotifications = dto?.AcceptNotifications ?? false;
+            AcceptPublicContact = dto?.AcceptPublicContact ?? false;
+            UseGeoLocalizationToReduceDistanceWithClients = dto?.UseGeoLocalizationToReduceDistanceWithClients ?? false;
+
+            var catalog = await _activityClient.GetCatalogAsync().ConfigureAwait(true);
+            var options = Flatten(catalog)
+                .OrderBy(a => a.Name, StringComparer.OrdinalIgnoreCase)
+                .Select(a => new ActivitySelectionOption(a.Code, a.Name)
+                {
+                    IsSelected = dto?.SelectedActivityCodes.Contains(a.Code, StringComparer.OrdinalIgnoreCase) == true
+                })
+                .ToList();
+
+            AvailableActivities.Clear();
+            foreach (var option in options)
+            {
+                AvailableActivities.Add(option);
+            }
+
+            StatusMessage = "Profil performer chargé.";
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible de charger la configuration performer : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    public PerformerProfileSettings BuildPerformerProfileSettings()
+    {
+        return new PerformerProfileSettings
+        {
+            PerformerId = string.IsNullOrWhiteSpace(PerformerId) ? string.Empty : PerformerId,
+            UserName = UserName,
+            ExerciseCountryCode = string.IsNullOrWhiteSpace(ExerciseCountryCode) ? "fr" : ExerciseCountryCode,
+            SIREN = SIREN,
+            WebSite = Website,
+            Active = Active,
+            AcceptNotifications = AcceptNotifications,
+            AcceptPublicContact = AcceptPublicContact,
+            UseGeoLocalizationToReduceDistanceWithClients = UseGeoLocalizationToReduceDistanceWithClients,
+            SelectedActivityCodes = AvailableActivities
+                .Where(a => a.IsSelected)
+                .Select(a => a.Code)
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .ToList()
+        };
+    }
+
+    [RelayCommand]
+    public async Task SaveAsync()
+    {
+        if (_api is null)
+        {
+            StatusMessage = "Client API de configuration indisponible.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            var dto = BuildPerformerProfileSettings();
+
+            var endpoint = new Uri(new Uri(_api.Settings.ApiUrl.TrimEnd('/') + "/", UriKind.Absolute), "account/performer-profile").ToString();
+            var response = await _api.CallAsync<PerformerProfileSettings>(HttpMethod.Put, endpoint, dto).ConfigureAwait(true);
+            StatusMessage = response is not null ? "Configuration performer enregistrée." : "Configuration performer enregistrée.";
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Impossible d’enregistrer la configuration performer : {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    private static IEnumerable<ActivityInfo> Flatten(IEnumerable<ActivityInfo> activities)
+    {
+        foreach (var activity in activities)
+        {
+            yield return activity;
+            foreach (var child in Flatten(activity.Children ?? Enumerable.Empty<ActivityInfo>()))
+            {
+                yield return child;
+            }
+        }
+    }
+}

src/PostIt/PostIt/Views/Layout/AdministrationPage.axaml

@@ -0,0 +1,44 @@
+<ContentPage xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             x:Class="PostIt.Views.AdministrationPage"
+             x:DataType="vm:AdministrationPageViewModel"
+             Header="Administration">
+
+  <Grid RowDefinitions="Auto,Auto,Auto,*" Margin="16" RowSpacing="12">
+    <TextBlock Grid.Row="0"
+               Text="Administration"
+               FontSize="22"
+               FontWeight="SemiBold"/>
+
+    <StackPanel Grid.Row="1" Spacing="8">
+      <TextBox Text="{Binding SearchText, Mode=TwoWay}"
+               PlaceholderText="Rechercher un utilisateur..."/>
+      <Button Content="Actualiser"
+              Command="{Binding RefreshCommand}"
+              IsEnabled="{Binding !IsBusy}"/>
+      <ProgressBar IsVisible="{Binding IsBusy}"
+                   IsIndeterminate="True"
+                   Height="8"/>
+      <TextBlock Text="{Binding StatusMessage}"
+                 TextWrapping="Wrap"/>
+    </StackPanel>
+
+    <ListBox Grid.Row="3"
+             ItemsSource="{Binding FilteredUsers}">
+      <ListBox.ItemTemplate>
+        <DataTemplate>
+          <Border Padding="8" BorderBrush="#D0D7DE" BorderThickness="1" CornerRadius="6">
+            <StackPanel Spacing="4">
+              <TextBlock Text="{Binding UserName, StringFormat='Nom : {0}'}" FontWeight="SemiBold"/>
+              <TextBlock Text="{Binding FullName, StringFormat='Nom complet : {0}'}" TextWrapping="Wrap"/>
+              <TextBlock Text="{Binding Email, StringFormat='Email : {0}'}" TextWrapping="Wrap"/>
+              <TextBlock Text="{Binding DedicatedGoogleCalendar, StringFormat='Calendrier : {0}'}" TextWrapping="Wrap"/>
+              <TextBlock Text="{Binding UserId, StringFormat='ID : {0}'}" Foreground="#4B5563" TextWrapping="Wrap"/>
+            </StackPanel>
+          </Border>
+        </DataTemplate>
+      </ListBox.ItemTemplate>
+    </ListBox>
+  </Grid>
+</ContentPage>

src/PostIt/PostIt/Views/Layout/AdministrationPage.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace PostIt.Views;
+
+public partial class AdministrationPage : ContentPage
+{
+    public AdministrationPage()
+    {
+        InitializeComponent();
+    }
+}

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

@@ -44,6 +44,18 @@
               Command="{Binding OpenMyFiles}"
               HorizontalAlignment="Center"
               IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>
+          <Button Content="Mon profil"
+              Command="{Binding OpenProfile}"
+              HorizontalAlignment="Center"
+              IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>
+          <Button Content="Mon activité / performer"
+              Command="{Binding OpenPerformerConfiguration}"
+              HorizontalAlignment="Center"
+              IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>
+          <Button Content="Administration"
+              Command="{Binding OpenAdministration}"
+              HorizontalAlignment="Center"
+              IsEnabled="{Binding SessionStatus.IsLoggedIn}"/>
           <Button Content="Mon usage / administration"
               Command="{Binding OpenResourceUsage}"
               HorizontalAlignment="Center"

src/PostIt/PostIt/Views/Layout/PerformerConfigurationPage.axaml

@@ -0,0 +1,59 @@
+<ContentPage xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             x:Class="PostIt.Views.PerformerConfigurationPage"
+             x:DataType="vm:PerformerConfigurationPageViewModel"
+             Header="Mon activité / performer">
+
+  <ScrollViewer>
+    <StackPanel Margin="16" Spacing="12">
+      <TextBlock Text="Mon activité / performer"
+                 FontSize="22"
+                 FontWeight="SemiBold"/>
+
+      <Button Content="Actualiser"
+              Command="{Binding RefreshCommand}"
+              IsEnabled="{Binding !IsBusy}"/>
+
+      <ProgressBar IsVisible="{Binding IsBusy}"
+                   IsIndeterminate="True"
+                   Height="8"/>
+
+      <TextBlock Text="{Binding UserName, StringFormat='Nom d’utilisateur : {0}'}"/>
+      <TextBox Text="{Binding ExerciseCountryCode, Mode=TwoWay}"
+               PlaceholderText="Code pays (fr, en...)"/>
+      <TextBox Text="{Binding SIREN, Mode=TwoWay}"
+               PlaceholderText="SIREN"/>
+      <TextBox Text="{Binding Website, Mode=TwoWay}"
+               PlaceholderText="Site web"/>
+
+      <CheckBox Content="Disponible / actif"
+                IsChecked="{Binding Active, Mode=TwoWay}"/>
+      <CheckBox Content="Accepter les notifications"
+                IsChecked="{Binding AcceptNotifications, Mode=TwoWay}"/>
+      <CheckBox Content="Accepter les demandes publiques"
+                IsChecked="{Binding AcceptPublicContact, Mode=TwoWay}"/>
+      <CheckBox Content="Utiliser la géolocalisation"
+                IsChecked="{Binding UseGeoLocalizationToReduceDistanceWithClients, Mode=TwoWay}"/>
+
+      <TextBlock Text="Activités" FontWeight="SemiBold"/>
+      <ItemsControl ItemsSource="{Binding AvailableActivities}">
+        <ItemsControl.ItemTemplate>
+          <DataTemplate>
+            <CheckBox Margin="0,0,0,6"
+                      Content="{Binding Name}"
+                      IsChecked="{Binding IsSelected, Mode=TwoWay}"/>
+          </DataTemplate>
+        </ItemsControl.ItemTemplate>
+      </ItemsControl>
+
+      <Button Content="Enregistrer"
+              Command="{Binding SaveCommand}"
+              IsEnabled="{Binding !IsBusy}"/>
+
+      <TextBlock Text="{Binding StatusMessage}"
+                 Foreground="#4B5563"
+                 TextWrapping="Wrap"/>
+    </StackPanel>
+  </ScrollViewer>
+</ContentPage>

src/PostIt/PostIt/Views/Layout/PerformerConfigurationPage.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace PostIt.Views;
+
+public partial class PerformerConfigurationPage : ContentPage
+{
+    public PerformerConfigurationPage()
+    {
+        InitializeComponent();
+    }
+}

src/PostIt/PostIt/Views/Layout/UserProfilePage.axaml

@@ -0,0 +1,298 @@
+<ContentPage xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             xmlns:identity="using:Yavsc.Abstract.Identity"
+             x:Class="PostIt.Views.UserProfilePage"
+             x:DataType="vm:UserProfilePageViewModel"
+             Header="Mon compte">
+
+  <ScrollViewer>
+    <StackPanel Margin="16" Spacing="16">
+      <Grid ColumnDefinitions="*,Auto">
+        <StackPanel Spacing="4">
+          <TextBlock Text="Gérer votre compte"
+                     FontSize="22"
+                     FontWeight="SemiBold"/>
+          <TextBlock Text="Paramètres de votre compte"
+                     Foreground="#4B5563"/>
+        </StackPanel>
+        <Button Grid.Column="1"
+                Content="Actualiser"
+                Command="{Binding RefreshCommand}"
+                IsEnabled="{Binding !IsBusy}"
+                VerticalAlignment="Center"/>
+      </Grid>
+
+      <ProgressBar IsVisible="{Binding IsBusy}"
+                   IsIndeterminate="True"
+                   Height="8"/>
+
+      <Border Padding="16"
+              BorderBrush="#D0D7DE"
+              BorderThickness="1"
+              CornerRadius="6">
+        <StackPanel Spacing="12">
+          <TextBlock Text="Paramètres du compte"
+                     FontSize="18"
+                     FontWeight="SemiBold"/>
+
+          <Grid ColumnDefinitions="150,*"
+                RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto"
+                RowSpacing="12">
+            <TextBlock Grid.Row="0"
+                       Text="Nom d’utilisateur"
+                       VerticalAlignment="Center"/>
+            <TextBox Grid.Row="0"
+                     Grid.Column="1"
+                     Text="{Binding UserName, Mode=TwoWay}"/>
+
+            <TextBlock Grid.Row="1"
+                       Text="Adresse e-mail"
+                       VerticalAlignment="Center"/>
+            <TextBlock Grid.Row="1"
+                       Grid.Column="1"
+                       Text="{Binding Email}"
+                       VerticalAlignment="Center"
+                       TextWrapping="Wrap"/>
+
+            <TextBlock Grid.Row="2"
+                       Text="Nom complet"
+                       VerticalAlignment="Center"/>
+            <TextBox Grid.Row="2"
+                     Grid.Column="1"
+                     Text="{Binding FullName, Mode=TwoWay}"/>
+
+            <TextBlock Grid.Row="3"
+                       Text="Rôles"
+                       VerticalAlignment="Center"/>
+            <TextBlock Grid.Row="3"
+                       Grid.Column="1"
+                       Text="{Binding Roles}"
+                       VerticalAlignment="Center"
+                       TextWrapping="Wrap"/>
+
+            <TextBlock Grid.Row="4"
+                       Text="Adresse"
+                       VerticalAlignment="Top"/>
+            <TextBox Grid.Row="4"
+                     Grid.Column="1"
+                     Text="{Binding Address, Mode=TwoWay}"
+                     AcceptsReturn="True"
+                     TextWrapping="Wrap"
+                     MinHeight="64"/>
+
+            <TextBlock Grid.Row="5"
+                       Text="Avatar"
+                       VerticalAlignment="Center"/>
+            <TextBlock Grid.Row="5"
+                       Grid.Column="1"
+                       Text="{Binding Avatar}"
+                       VerticalAlignment="Center"
+                       TextWrapping="Wrap"/>
+
+            <TextBlock Grid.Row="6"
+                       Text="Calendrier Google"
+                       VerticalAlignment="Center"/>
+            <TextBox Grid.Row="6"
+                     Grid.Column="1"
+                     Text="{Binding DedicatedGoogleCalendar, Mode=TwoWay}"/>
+
+            <TextBlock Grid.Row="7"
+                       Text="Courriel mensuel"
+                       VerticalAlignment="Center"/>
+            <StackPanel Grid.Row="7"
+                        Grid.Column="1"
+                        Orientation="Horizontal"
+                        Spacing="8">
+              <CheckBox Content="Recevoir les nouvelles mensuelles"
+                        IsChecked="{Binding AllowMonthlyEmail, Mode=TwoWay}"/>
+              <Button Content="Enregistrer"
+                      Command="{Binding SetMonthlyEmailPreferenceCommand}"
+                      IsEnabled="{Binding !IsBusy}"/>
+            </StackPanel>
+
+            <TextBlock Grid.Row="8"
+                       Text="E-mail confirmé"
+                       VerticalAlignment="Center"/>
+            <TextBlock Grid.Row="8"
+                       Grid.Column="1"
+                       Text="{Binding EmailConfirmed}"
+                       VerticalAlignment="Center"
+                       TextWrapping="Wrap"/>
+          </Grid>
+
+          <StackPanel Orientation="Horizontal" Spacing="8" HorizontalAlignment="Right">
+            <Button x:Name="ChooseAvatarButton"
+                    Content="Choisir un avatar"
+                    Click="ChooseAvatar_Click"
+                    IsEnabled="{Binding !IsBusy}"/>
+            <Button Content="Enregistrer le profil"
+                    Command="{Binding SaveProfileCommand}"/>
+          </StackPanel>
+        </StackPanel>
+      </Border>
+
+      <Border Padding="16"
+              BorderBrush="#D0D7DE"
+              BorderThickness="1"
+              CornerRadius="6">
+        <StackPanel Spacing="10">
+          <TextBlock Text="Sécurité et connexions"
+                     FontSize="18"
+                     FontWeight="SemiBold"/>
+          <TextBlock Text="{Binding Email, StringFormat='E-mail : {0}'}"/>
+          <TextBlock Text="{Binding EmailConfirmed, StringFormat='Adresse confirmée : {0}'}"/>
+          <Button Content="Renvoyer le courriel de confirmation"
+                  Command="{Binding SendEmailConfirmationCommand}"
+                  IsVisible="{Binding !EmailConfirmed}"/>
+          <TextBlock Text="{Binding ExternalLoginCount, StringFormat='Connexions externes : {0}'}"/>
+
+          <ItemsControl ItemsSource="{Binding ExternalLogins}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="identity:LinkedExternalLogin">
+                <Grid ColumnDefinitions="*,Auto" Margin="0,4">
+                  <TextBlock Text="{Binding DisplayName}"
+                             VerticalAlignment="Center"/>
+                  <Button Grid.Column="1"
+                          Content="Dissocier"
+                          Command="{Binding $parent[ContentPage].((vm:UserProfilePageViewModel)DataContext).RemoveExternalLoginCommand}"
+                          CommandParameter="{Binding}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+
+          <CheckBox Content="Activer l’authentification à deux facteurs"
+                    IsChecked="{Binding TwoFactorEnabled, Mode=TwoWay}"/>
+          <Button Content="Enregistrer le réglage de sécurité"
+                  Command="{Binding SetTwoFactorCommand}"
+                  IsEnabled="{Binding !IsBusy}"
+                  HorizontalAlignment="Right"/>
+          <TextBlock Text="{Binding HasPassword, StringFormat='Mot de passe local configuré : {0}'}"/>
+          <TextBox PlaceholderText="Mot de passe actuel"
+                   PasswordChar="●"
+                   Text="{Binding CurrentPassword, Mode=TwoWay}"
+                   IsVisible="{Binding HasPassword}"/>
+          <TextBox PlaceholderText="Nouveau mot de passe"
+                   PasswordChar="●"
+                   Text="{Binding NewPassword, Mode=TwoWay}"/>
+          <TextBox PlaceholderText="Confirmer le nouveau mot de passe"
+                   PasswordChar="●"
+                   Text="{Binding ConfirmPassword, Mode=TwoWay}"/>
+          <Button Content="Modifier le mot de passe"
+                  Command="{Binding ChangePasswordCommand}"
+                  IsEnabled="{Binding !IsBusy}"
+                  HorizontalAlignment="Right"/>
+        </StackPanel>
+      </Border>
+
+      <Border Padding="16"
+              BorderBrush="#D0D7DE"
+              BorderThickness="1"
+              CornerRadius="6">
+        <StackPanel Spacing="10">
+          <TextBlock Text="Informations bancaires"
+                     FontSize="18"
+                     FontWeight="SemiBold"/>
+          <ItemsControl ItemsSource="{Binding BankAccounts}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="identity:BankAccountInfo">
+                <Grid ColumnDefinitions="*,Auto" Margin="0,4">
+                  <StackPanel Spacing="2">
+                    <TextBlock Text="{Binding IBAN, StringFormat='IBAN : {0}'}"/>
+                    <TextBlock Text="{Binding BIC, StringFormat='BIC : {0}'}"/>
+                  </StackPanel>
+                  <Button Grid.Column="1"
+                          Content="Supprimer"
+                          Command="{Binding $parent[ContentPage].((vm:UserProfilePageViewModel)DataContext).DeleteBankAccountCommand}"
+                          CommandParameter="{Binding}"/>
+                </Grid>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <TextBlock Text="Ajouter un compte bancaire"
+                     FontWeight="SemiBold"/>
+          <TextBox PlaceholderText="IBAN" Text="{Binding BankIban, Mode=TwoWay}"/>
+          <TextBox PlaceholderText="BIC" Text="{Binding BankBic, Mode=TwoWay}"/>
+          <Grid ColumnDefinitions="*,*" ColumnSpacing="8">
+            <TextBox PlaceholderText="Code banque" Text="{Binding BankCode, Mode=TwoWay}"/>
+            <TextBox Grid.Column="1" PlaceholderText="Code guichet" Text="{Binding BankWicketCode, Mode=TwoWay}"/>
+          </Grid>
+          <Grid ColumnDefinitions="*,Auto" ColumnSpacing="8">
+            <TextBox PlaceholderText="Numéro de compte" Text="{Binding BankAccountNumber, Mode=TwoWay}"/>
+            <NumericUpDown Grid.Column="1"
+                           Width="120"
+                           Minimum="0"
+                           Maximum="99"
+                           Value="{Binding BankedKey, Mode=TwoWay}"/>
+          </Grid>
+          <Button Content="Ajouter les informations bancaires"
+                  Command="{Binding AddBankAccountCommand}"
+                  IsEnabled="{Binding !IsBusy}"
+                  HorizontalAlignment="Right"/>
+        </StackPanel>
+      </Border>
+
+      <Border Padding="16"
+              BorderBrush="#D0D7DE"
+              BorderThickness="1"
+              CornerRadius="6">
+        <StackPanel Spacing="10">
+          <TextBlock Text="Autres paramètres du compte"
+                     FontSize="18"
+                     FontWeight="SemiBold"/>
+          <TextBlock Text="{Binding PostsCounter, StringFormat='Articles publiés : {0}'}"/>
+          <TextBlock Text="{Binding DiskUsage, StringFormat='Espace utilisé (octets) : {0}'}"/>
+          <TextBlock Text="{Binding DiskQuota, StringFormat='Quota disque (octets) : {0}'}"/>
+          <TextBlock Text="{Binding Credits, StringFormat='Crédits : {0}'}"/>
+          <TextBlock Text="{Binding UserId, StringFormat='Identifiant utilisateur : {0}'}"/>
+          <TextBlock Text="Calendrier Google"/>
+          <StackPanel Orientation="Horizontal" Spacing="8">
+            <Button Content="Charger les calendriers"
+                    Command="{Binding LoadCalendarsCommand}"/>
+            <Button Content="Désactiver le calendrier"
+                    Command="{Binding ChooseCalendarCommand}"
+                    CommandParameter="{x:Null}"/>
+          </StackPanel>
+          <ItemsControl ItemsSource="{Binding Calendars}">
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="identity:CalendarOption">
+                <Button Content="{Binding Name}"
+                        Command="{Binding $parent[ContentPage].((vm:UserProfilePageViewModel)DataContext).ChooseCalendarCommand}"
+                        CommandParameter="{Binding}"
+                        HorizontalAlignment="Left"/>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+          <StackPanel Orientation="Horizontal" Spacing="8">
+            <Button Content="Gérer mes cercles" Click="OpenCircles_Click"/>
+            <Button Content="Gérer mon activité professionnelle" Click="OpenPerformerConfiguration_Click"/>
+            <Button Content="Mes publications" Click="OpenBlogs_Click"/>
+          </StackPanel>
+        </StackPanel>
+      </Border>
+
+      <Border Padding="16"
+              BorderBrush="#D0D7DE"
+              BorderThickness="1"
+              CornerRadius="6">
+        <StackPanel Spacing="8">
+          <TextBlock Text="Supprimer le compte"
+                     FontSize="18"
+                     FontWeight="SemiBold"/>
+          <TextBlock Text="Cette action est définitive. Saisissez votre nom d’utilisateur actuel pour confirmer."
+                     TextWrapping="Wrap"/>
+          <TextBox PlaceholderText="{Binding CurrentUserName, StringFormat='Saisir {0} pour confirmer'}"
+                   Text="{Binding UsernameConfirmation, Mode=TwoWay}"/>
+          <Button Content="Supprimer définitivement mon compte"
+                  Command="{Binding DeleteAccountCommand}"
+                  HorizontalAlignment="Right"/>
+        </StackPanel>
+      </Border>
+
+      <TextBlock Text="{Binding StatusMessage}"
+                 Foreground="#4B5563"
+                 TextWrapping="Wrap"/>
+    </StackPanel>
+  </ScrollViewer>
+</ContentPage>

src/PostIt/PostIt/Views/Layout/UserProfilePage.axaml.cs

@@ -0,0 +1,139 @@
+using System;
+using System.IO;
+using System.Linq;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+using Microsoft.Extensions.DependencyInjection;
+using PostIt.Services;
+using PostIt.ViewModels;
+
+namespace PostIt.Views;
+
+public partial class UserProfilePage : ContentPage
+{
+    public UserProfilePage()
+    {
+        InitializeComponent();
+    }
+
+    private async void ChooseAvatar_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        if (DataContext is not UserProfilePageViewModel viewModel)
+        {
+            return;
+        }
+
+        var topLevel = TopLevel.GetTopLevel(this);
+        if (topLevel is null)
+        {
+            viewModel.StatusMessage = "Impossible d’accéder au sélecteur de fichiers.";
+            return;
+        }
+
+        viewModel.IsBusy = true;
+        try
+        {
+            var files = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
+            {
+                Title = "Choisir un avatar",
+                AllowMultiple = false,
+                FileTypeFilter =
+                [
+                    new FilePickerFileType("Images")
+                    {
+                        Patterns = ["*.png", "*.jpg", "*.jpeg", "*.webp", "*.gif", "*.bmp", "*.tif", "*.tiff"]
+                    }
+                ]
+            });
+
+            var file = files.FirstOrDefault();
+            if (file is null)
+            {
+                return;
+            }
+
+            var properties = await file.GetBasicPropertiesAsync();
+            if (properties.Size is > 2 * 1024 * 1024)
+            {
+                viewModel.StatusMessage = "L’avatar ne doit pas dépasser 2 Mo.";
+                return;
+            }
+
+            var app = (App?)Application.Current;
+            var api = app?.ServiceProvider?.GetRequiredService<YavscApiClient>();
+            if (api is null)
+            {
+                viewModel.StatusMessage = "Client API indisponible.";
+                return;
+            }
+
+            await using var stream = await file.OpenReadAsync();
+            var message = await api.SetAvatarAsync(stream, file.Name, GetMimeType(file.Name));
+            await viewModel.RefreshAsync();
+            if (viewModel.IsProfileLoaded)
+            {
+                viewModel.StatusMessage = message;
+            }
+        }
+        catch (Exception ex)
+        {
+            viewModel.StatusMessage = $"Impossible d’envoyer l’avatar : {ex.Message}";
+        }
+        finally
+        {
+            viewModel.IsBusy = false;
+        }
+    }
+
+    private async void OpenCircles_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        var app = (App?)Application.Current;
+        var viewModel = app?.ServiceProvider?.GetRequiredService<CirclesPageViewModel>();
+        if (app is null || viewModel is null)
+        {
+            if (DataContext is UserProfilePageViewModel profile)
+            {
+                profile.StatusMessage = "La page des cercles est indisponible.";
+            }
+            return;
+        }
+
+        await viewModel.RefreshAsync();
+        await app.PushPageAsync(viewModel);
+    }
+
+    private async void OpenPerformerConfiguration_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        var app = (App?)Application.Current;
+        var viewModel = app?.ServiceProvider?.GetRequiredService<PerformerConfigurationPageViewModel>();
+        if (app is null || viewModel is null)
+        {
+            if (DataContext is UserProfilePageViewModel profile)
+            {
+                profile.StatusMessage = "La configuration professionnelle est indisponible.";
+            }
+            return;
+        }
+
+        await viewModel.InitializeAsync();
+        await app.PushPageAsync(viewModel);
+    }
+
+    private async void OpenBlogs_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        await App.PushBlogsPageAsync();
+    }
+
+    private static string GetMimeType(string fileName) =>
+        Path.GetExtension(fileName).ToLowerInvariant() switch
+        {
+            ".png" => "image/png",
+            ".jpg" or ".jpeg" => "image/jpeg",
+            ".webp" => "image/webp",
+            ".gif" => "image/gif",
+            ".bmp" => "image/bmp",
+            ".tif" or ".tiff" => "image/tiff",
+            _ => "application/octet-stream"
+        };
+}

src/Yavsc.Abstract/Constants.cs

@@ -30,6 +30,13 @@ namespace Yavsc
         public const string UserNameRegExp = @"^[a-zA-Z][a-zA-Z0-9._-]*$";
         public const string UserFileNamePatternRegExp = @"^([a-zA-Z0-9._-]*/)*[a-zA-Z0-9._-]+$";
 
+        public const string ResourceUsagePath = "resource-usage";
+        public const string ResourceUsageCurrentUserRoute = "me";
+        public const string ResourceUsageAdminRoute = "admin";
+        public const string ResourceUsageDefaultCurrency = "EUR";
+        public const string ResourceUsageCurrentUserDisplayName = "current-user";
+        public const string ResourceUsageAdminDisplayName = "administrator";
+
         public const string SigninPath = "~/signin";
         public const string LogoutPath = "~/signout";
 

src/Yavsc.Abstract/Identity/AccountSecurityRequests.cs

@@ -0,0 +1,59 @@
+#nullable enable
+
+namespace Yavsc.Abstract.Identity;
+
+public sealed class ChangePasswordRequest
+{
+    public string CurrentPassword { get; set; } = string.Empty;
+    public string NewPassword { get; set; } = string.Empty;
+    public string ConfirmPassword { get; set; } = string.Empty;
+}
+
+public sealed class TwoFactorRequest
+{
+    public bool Enabled { get; set; }
+}
+
+public sealed class MonthlyEmailPreferenceRequest
+{
+    public bool Enabled { get; set; }
+}
+
+public sealed class DeleteAccountRequest
+{
+    public string UsernameConfirmation { get; set; } = string.Empty;
+}
+
+public sealed class LinkedExternalLogin
+{
+    public string Provider { get; set; } = string.Empty;
+    public string ProviderKey { get; set; } = string.Empty;
+    public string DisplayName { get; set; } = string.Empty;
+}
+
+public sealed class BankAccountInfo
+{
+    public long Id { get; set; }
+    public string IBAN { get; set; } = string.Empty;
+    public string BIC { get; set; } = string.Empty;
+    public string BankCode { get; set; } = string.Empty;
+    public string WicketCode { get; set; } = string.Empty;
+    public string AccountNumber { get; set; } = string.Empty;
+    public int BankedKey { get; set; }
+}
+
+public sealed class BankAccountInfoRequest
+{
+    public string IBAN { get; set; } = string.Empty;
+    public string BIC { get; set; } = string.Empty;
+    public string BankCode { get; set; } = string.Empty;
+    public string WicketCode { get; set; } = string.Empty;
+    public string AccountNumber { get; set; } = string.Empty;
+    public int BankedKey { get; set; }
+}
+
+public sealed class CalendarOption
+{
+    public string Id { get; set; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
+}

src/Yavsc.Abstract/Identity/Me.cs

@@ -1,9 +1,23 @@
+#nullable enable
+
 namespace Yavsc.Abstract.Identity {
   public class Me : UserInfo
   {
-      public AuthToken Token {
+      public bool EmailConfirmed { get; set; }
+      public bool AllowMonthlyEmail { get; set; }
+      public bool HasPassword { get; set; }
+      public bool TwoFactorEnabled { get; set; }
+      public int ExternalLoginCount { get; set; }
+      public long PostsCounter { get; set; }
+      public long DiskUsage { get; set; }
+      public long DiskQuota { get; set; }
+      public decimal Credits { get; set; }
+      public BankAccountInfo[] BankAccounts { get; set; } = [];
+      public LinkedExternalLogin[] ExternalLogins { get; set; } = [];
+
+      public AuthToken? Token {
           get;
           set;
       }
   }
-} 
+}

src/Yavsc.Abstract/Identity/ProfileUpdateRequest.cs

@@ -0,0 +1,12 @@
+#nullable enable
+
+namespace Yavsc.Abstract.Identity;
+
+public class ProfileUpdateRequest
+{
+    public string? UserName { get; set; }
+    public string? FullName { get; set; }
+    public string? Address { get; set; }
+    public string? GoogleCalendarId { get; set; }
+    public string? BankInfoSummary { get; set; }
+}

src/Yavsc.Abstract/Identity/UserInfo.cs

@@ -1,10 +1,11 @@
+#nullable enable
+
 namespace  Yavsc.Abstract.Identity
 {
     public class UserInfo {
 
         public UserInfo()
         {
-
         }
 
         public UserInfo(string userId, string userName, string email, string avatar)
@@ -14,10 +15,15 @@ namespace  Yavsc.Abstract.Identity
             Email = email;
             Avatar = avatar;
         }
-        public string UserId { get; set; }
 
-        public string UserName { get; set; }
+        public string UserId { get; set; } = string.Empty;
-        public string Email { get; }
+        public string? UserName { get; set; }
-        public string Avatar { get; set; }
+        public string? FullName { get; set; }
+        public string? Email { get; set; }
+        public string? Address { get; set; }
+        public string? Avatar { get; set; }
+        public string[] Roles { get; set; } = [];
+        public string? DedicatedGoogleCalendar { get; set; }
+        public string? BankInfoSummary { get; set; }
     }
 }

src/Yavsc.Abstract/Resources/ResourceUsageSummary.cs

@@ -0,0 +1,22 @@
+namespace Yavsc.Abstract.Resources;
+
+/// <summary>
+/// Lightweight usage snapshot for PostIt / Yavsc resource accounting.
+/// The initial implementation is intentionally intentionally small and
+/// serialisable so it can be exposed through the API and consumed by the
+/// PostIt client without requiring a full database model yet.
+/// </summary>
+public sealed class ResourceUsageSummary
+{
+    public string UserId { get; set; } = string.Empty;
+    public string UserName { get; set; } = string.Empty;
+    public DateTimeOffset RecordedAtUtc { get; set; }
+
+    public decimal ApiCalls { get; set; }
+    public decimal CpuSeconds { get; set; }
+    public decimal BandwidthMb { get; set; }
+    public decimal StorageMb { get; set; }
+
+    public decimal EstimatedCompensation { get; set; }
+    public string Currency { get; set; } = Constants.ResourceUsageDefaultCurrency;
+}

src/Yavsc.Abstract/Workflow/PerformerProfileSettings.cs

@@ -0,0 +1,15 @@
+namespace Yavsc.Abstract.Workflow;
+
+public sealed class PerformerProfileSettings
+{
+    public string PerformerId { get; set; } = string.Empty;
+    public string UserName { get; set; } = string.Empty;
+    public string ExerciseCountryCode { get; set; } = "fr";
+    public string SIREN { get; set; } = string.Empty;
+    public string WebSite { get; set; } = string.Empty;
+    public bool Active { get; set; }
+    public bool AcceptNotifications { get; set; }
+    public bool AcceptPublicContact { get; set; }
+    public bool UseGeoLocalizationToReduceDistanceWithClients { get; set; }
+    public List<string> SelectedActivityCodes { get; set; } = new();
+}

src/Yavsc.Api.Client/ResourceUsageApiClient.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Yavsc.Abstract.Resources;
+
+namespace Yavsc.Api.Client;
+
+/// <summary>
+/// Thin HTTP client for the PostIt resource-usage reporting flow.
+/// It follows the same pattern as the other Yavsc API clients: absolute
+/// paths, JSON request/response mapping, and no application logic.
+/// </summary>
+public sealed class ResourceUsageApiClient
+{
+    private const string PathPrefix = Constants.ResourceUsagePath;
+
+    private readonly IYavscApiClient _api;
+    private readonly Func<string> _businessBaseAddress;
+
+    public ResourceUsageApiClient(IYavscApiClient api, string businessBaseAddress)
+        : this(api, () => businessBaseAddress)
+    {
+    }
+
+    public ResourceUsageApiClient(IYavscApiClient api, Func<string> businessBaseAddress)
+    {
+        _api = api ?? throw new ArgumentNullException(nameof(api));
+        _businessBaseAddress = businessBaseAddress ?? throw new ArgumentNullException(nameof(businessBaseAddress));
+        _ = ResolveBusinessBaseAddress();
+    }
+
+    public Task<ResourceUsageSummary> GetCurrentAsync(CancellationToken ct = default)
+    {
+        return _api.CallAsync<ResourceUsageSummary>(
+            HttpMethod.Get,
+            Absolute($"{PathPrefix}/{Constants.ResourceUsageCurrentUserRoute}"),
+            ct: ct);
+    }
+
+    public Task<List<ResourceUsageSummary>> GetAdminOverviewAsync(CancellationToken ct = default)
+    {
+        return _api.CallAsync<List<ResourceUsageSummary>>(
+            HttpMethod.Get,
+            Absolute($"{PathPrefix}/{Constants.ResourceUsageAdminRoute}"),
+            ct: 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/Controllers/Administration/ResourceUsageApiController.cs

@@ -0,0 +1,96 @@
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Yavsc.Abstract.Resources;
+using Yavsc.Models;
+using Yavsc.Server.Helpers;
+
+namespace Yavsc.ApiControllers.Administration;
+
+[Produces("application/json")]
+[Authorize]
+[Route(Constants.APIPrefix + "/" + Constants.ResourceUsagePath)]
+public sealed class ResourceUsageApiController : Controller
+{
+    private readonly ApplicationDbContext _dbContext;
+
+    public ResourceUsageApiController(ApplicationDbContext dbContext)
+    {
+        _dbContext = dbContext;
+    }
+
+    private static ResourceUsageSummary ToSummary(ResourceUsageRecord record)
+        => new()
+        {
+            UserId = record.UserId,
+            UserName = record.UserName,
+            RecordedAtUtc = new DateTimeOffset(record.RecordedAtUtc, TimeSpan.Zero),
+            ApiCalls = record.ApiCalls,
+            CpuSeconds = record.CpuSeconds,
+            BandwidthMb = record.BandwidthMb,
+            StorageMb = record.StorageMb,
+            EstimatedCompensation = record.EstimatedCompensation,
+            Currency = record.Currency
+        };
+
+    [HttpGet(Constants.ResourceUsageCurrentUserRoute)]
+    public async Task<ActionResult<ResourceUsageSummary>> GetCurrentUserUsage()
+    {
+        var userId = User.GetUserId();
+        if (string.IsNullOrWhiteSpace(userId))
+        {
+            return Unauthorized();
+        }
+
+        var userName = User.Identity?.Name ?? Constants.ResourceUsageCurrentUserDisplayName;
+        var record = await _dbContext.ResourceUsageRecords
+            .Where(r => r.UserId == userId)
+            .OrderByDescending(r => r.RecordedAtUtc)
+            .FirstOrDefaultAsync();
+
+        if (record is null)
+        {
+            var zeroUsage = new ResourceUsageRecord
+            {
+                UserId = userId,
+                UserName = userName,
+                RecordedAtUtc = DateTime.UtcNow,
+                ApiCalls = 0m,
+                CpuSeconds = 0m,
+                BandwidthMb = 0m,
+                StorageMb = 0m,
+                EstimatedCompensation = 0m,
+                Currency = Constants.ResourceUsageDefaultCurrency,
+                UserCreated = userId,
+                UserModified = userId,
+                DateCreated = DateTime.UtcNow,
+                DateModified = DateTime.UtcNow,
+            };
+
+            _dbContext.ResourceUsageRecords.Add(zeroUsage);
+            await _dbContext.SaveChangesAsync(userId);
+            return Ok(ToSummary(zeroUsage));
+        }
+
+        return Ok(ToSummary(record));
+    }
+
+    [HttpGet(Constants.ResourceUsageAdminRoute)]
+    public async Task<ActionResult<List<ResourceUsageSummary>>> GetAdminOverview()
+    {
+        if (!User.IsInRole(Constants.AdminGroupName))
+        {
+            return Forbid();
+        }
+
+        var latestByUser = (await _dbContext.ResourceUsageRecords
+                .OrderByDescending(r => r.RecordedAtUtc)
+                .ToListAsync())
+            .GroupBy(r => r.UserId)
+            .Select(g => g.First())
+            .OrderByDescending(r => r.RecordedAtUtc)
+            .ToList();
+
+        return Ok(latestByUser.Select(ToSummary).ToList());
+    }
+}

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

@@ -1,3 +1,4 @@
+using System.Diagnostics;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Razor;
@@ -129,6 +130,9 @@ namespace Yavsc.ApiControllers
                 Temp = siteSettings.TempDir,
             };
 
+            var stopwatch = Stopwatch.StartNew();
+            FileInfo? renderedPdf = null;
+
             try
             {
                 // 1. Render the LaTeX template (Estimate_tex) to a TeX source
@@ -141,10 +145,28 @@ namespace Yavsc.ApiControllers
                 //    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)
+                renderedPdf = model.GenerateEstimatePdf();
+                if (renderedPdf is FileInfo fo && fo.Exists)
                 {
-                     return File(fo.OpenRead(), "application/pdf");
+                    await ResourceUsageTracker.RecordAsync(
+                        dbContext,
+                        uid,
+                        User.Identity?.Name ?? uid,
+                        cpuSeconds: (decimal)stopwatch.Elapsed.TotalSeconds,
+                        storageBytes: fo.Length,
+                        actorUserId: uid);
+
+                    return File(fo.OpenRead(), "application/pdf");
                 }
+
+                await ResourceUsageTracker.RecordAsync(
+                    dbContext,
+                    uid,
+                    User.Identity?.Name ?? uid,
+                    cpuSeconds: (decimal)stopwatch.Elapsed.TotalSeconds,
+                    storageBytes: 0,
+                    actorUserId: uid);
+
                 string msg = "TeX render failed: " + model.GenerationErrorMessage;
                 logger.LogError(msg);
                 return Problem(msg);
@@ -152,6 +174,14 @@ namespace Yavsc.ApiControllers
             }
             catch (Exception ex)
             {
+                await ResourceUsageTracker.RecordAsync(
+                    dbContext,
+                    uid,
+                    User.Identity?.Name ?? uid,
+                    cpuSeconds: (decimal)stopwatch.Elapsed.TotalSeconds,
+                    storageBytes: renderedPdf?.Length ?? 0,
+                    actorUserId: uid);
+
                 logger.LogError(ex, "estimate {QueryId}: TeX/PDF render failed", queryId);
                 return Problem("TeX render failed: " + ex.Message);
             }

src/Yavsc.Api/Controllers/accounting/AccountController.cs

@@ -1,4 +1,6 @@
-using Microsoft.AspNetCore.Identity;
+#nullable enable
+
+using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
@@ -9,6 +11,10 @@ using Yavsc.Api.Helpers;
 using Yavsc.Server.Helpers;
 using System.Diagnostics;
 using Microsoft.Extensions.Options;
+using Yavsc.Abstract.Identity;
+using Yavsc.Abstract.Workflow;
+using Yavsc.Interface;
+using Yavsc.Services;
 
 namespace Yavsc.WebApi.Controllers
 {
@@ -30,35 +36,100 @@ namespace Yavsc.WebApi.Controllers
         readonly ApplicationDbContext _dbContext;
         private readonly SiteSettings siteSettings;
         private readonly ILogger _logger;
+        private readonly UserManager<ApplicationUser> _userManager;
+        private readonly ITrueEmailSender _emailSender;
+        private readonly ICalendarManager _calendarManager;
 
         public ApiAccountController(
         ILoggerFactory loggerFactory, ApplicationDbContext dbContext,
-        IOptions<SiteSettings> siteSettings)
+        IOptions<SiteSettings> siteSettings, UserManager<ApplicationUser> userManager,
+        ITrueEmailSender emailSender, ICalendarManager calendarManager)
         {
             _logger = loggerFactory.CreateLogger(nameof(ApiAccountController));
             _dbContext = dbContext;
             this.siteSettings = siteSettings.Value;
+            _userManager = userManager;
+            _emailSender = emailSender;
+            _calendarManager = calendarManager;
         }
 
         [HttpGet("me")]
         public async Task<IActionResult> Me()
         {
-            if (User == null)
+            if (User?.Identity?.IsAuthenticated != true)
-                return new BadRequestObjectResult(
+            {
-                        new { error = "user not found" });
+                return Challenge();
+            }
+
             var uid = User.GetUserId();
-            Debug.Assert(uid != null, "uid is null");
+            if (string.IsNullOrWhiteSpace(uid))
-            var userData = await GetUserData(uid);
+            {
-            Debug.Assert(userData != null, "userData is null");
+                return Challenge();
-            var user = new Yavsc.Models.Auth.Me(userData.Id, userData.UserName, userData.Email,
+            }
-            userData.Avatar,
-            userData.PostalAddress, userData.DedicatedGoogleCalendar);
 
-            var userRoles = _dbContext.UserRoles.Where(u => u.UserId == uid).Select(r => r.RoleId).ToArray();
+            var userData = await _dbContext.Users
+                .Include(u => u.PostalAddress)
+                .Include(u => u.AccountBalance)
+                .Include(u => u.BankInfo)
+                .FirstOrDefaultAsync(u => u.Id == uid);
 
-            IdentityRole[] roles = _dbContext.Roles.Where(r => userRoles.Contains(r.Id)).ToArray();
+            if (userData is null)
+            {
+                return NotFound(new { error = "user not found" });
+            }
 
-            user.Roles = roles.Select(r => r.Name).ToArray();
+            var user = new Yavsc.Abstract.Identity.Me
+            {
+                UserId = userData.Id,
+                UserName = userData.UserName,
+                Email = userData.Email,
+                Avatar = userData.Avatar,
+                FullName = userData.FullName,
+                Address = userData.PostalAddress?.Address ?? string.Empty,
+                DedicatedGoogleCalendar = userData.DedicatedGoogleCalendar
+            };
+            user.BankInfoSummary = userData.BankInfo is { Count: > 0 }
+                ? string.Join(" | ", userData.BankInfo.Select(b => string.IsNullOrWhiteSpace(b.IBAN) ? b.BIC : $"{b.IBAN} / {b.BIC}"))
+                : string.Empty;
+
+            var userRoles = await _dbContext.UserRoles
+                .Where(u => u.UserId == uid)
+                .Select(r => r.RoleId)
+                .ToArrayAsync();
+
+            var roles = await _dbContext.Roles
+                .Where(r => userRoles.Contains(r.Id))
+                .ToArrayAsync();
+
+            user.Roles = roles.Select(r => r.Name).OfType<string>().ToArray();
+            user.EmailConfirmed = await _userManager.IsEmailConfirmedAsync(userData);
+            user.AllowMonthlyEmail = userData.AllowMonthlyEmail;
+            user.HasPassword = await _userManager.HasPasswordAsync(userData);
+            user.TwoFactorEnabled = await _userManager.GetTwoFactorEnabledAsync(userData);
+            var externalLogins = await _userManager.GetLoginsAsync(userData);
+            user.ExternalLoginCount = externalLogins.Count;
+            user.ExternalLogins = externalLogins.Select(login => new LinkedExternalLogin
+            {
+                Provider = login.LoginProvider,
+                ProviderKey = login.ProviderKey,
+                DisplayName = login.ProviderDisplayName ?? login.LoginProvider
+            }).ToArray();
+            user.PostsCounter = await _dbContext.BlogSpot.LongCountAsync(x => x.AuthorId == uid);
+            user.DiskUsage = userData.DiskUsage;
+            user.DiskQuota = userData.DiskQuota;
+            user.Credits = userData.AccountBalance?.Credits ?? 0;
+            user.BankAccounts = (userData.BankInfo ?? [])
+                .Select(bank => new BankAccountInfo
+                {
+                    Id = bank.Id,
+                    IBAN = bank.IBAN,
+                    BIC = bank.BIC,
+                    BankCode = bank.BankCode,
+                    WicketCode = bank.WicketCode,
+                    AccountNumber = bank.AccountNumber,
+                    BankedKey = bank.BankedKey
+                })
+                .ToArray();
 
             return Ok(user);
         }
@@ -68,9 +139,571 @@ namespace Yavsc.WebApi.Controllers
             return await _dbContext.Users
                             .Include(u => u.PostalAddress)
                             .Include(u => u.AccountBalance)
+                            .Include(u => u.BankInfo)
                             .FirstAsync(u => u.Id == uid);
         }
 
+        [HttpPut("me")]
+        public async Task<IActionResult> UpdateMe([FromBody] ProfileUpdateRequest request)
+        {
+            if (request is null)
+            {
+                return BadRequest(new { error = "Payload is required." });
+            }
+
+            if (request.BankInfoSummary is not null)
+            {
+                return BadRequest(new { error = "Bank information must be managed through the bank-info endpoint." });
+            }
+
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var user = await _dbContext.Users
+                .Include(u => u.PostalAddress)
+                .Include(u => u.BankInfo)
+                .FirstOrDefaultAsync(u => u.Id == uid);
+
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            if (!string.IsNullOrWhiteSpace(request.UserName))
+            {
+                var trimmedUserName = request.UserName.Trim();
+                if (!string.Equals(user.UserName, trimmedUserName, StringComparison.Ordinal))
+                {
+                    var usernameUpdate = await _userManager.SetUserNameAsync(user, trimmedUserName);
+                    if (!usernameUpdate.Succeeded)
+                    {
+                        return BadRequest(new { error = "Unable to update username.", details = usernameUpdate.Errors.Select(e => e.Description) });
+                    }
+                }
+            }
+
+            if (request.FullName is not null)
+            {
+                user.FullName = request.FullName.Trim();
+            }
+
+            if (request.Address is not null)
+            {
+                var trimmedAddress = request.Address.Trim();
+                if (string.IsNullOrWhiteSpace(trimmedAddress))
+                {
+                    user.PostalAddress = null;
+                }
+                else if (user.PostalAddress is null)
+                {
+                    user.PostalAddress = new Yavsc.Models.Relationship.Location { Address = trimmedAddress };
+                }
+                else
+                {
+                    user.PostalAddress.Address = trimmedAddress;
+                }
+            }
+
+            if (request.GoogleCalendarId is not null)
+            {
+                user.DedicatedGoogleCalendar = request.GoogleCalendarId.Trim();
+            }
+
+            await _dbContext.SaveChangesAsync(uid);
+            return Ok(new { status = "saved", fullName = user.FullName, address = user.PostalAddress?.Address, googleCalendarId = user.DedicatedGoogleCalendar });
+        }
+
+        [HttpPut("preferences/monthly-email")]
+        public async Task<IActionResult> UpdateMonthlyEmailPreference([FromBody] MonthlyEmailPreferenceRequest request)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var user = await _userManager.FindByIdAsync(uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            user.AllowMonthlyEmail = request.Enabled;
+            var result = await _userManager.UpdateAsync(user);
+            if (!result.Succeeded)
+            {
+                return BadRequest(new { error = "Unable to update email preferences.", details = result.Errors.Select(e => e.Description) });
+            }
+
+            return Ok(new { enabled = user.AllowMonthlyEmail });
+        }
+
+        [HttpPut("security/two-factor")]
+        public async Task<IActionResult> UpdateTwoFactor([FromBody] TwoFactorRequest request)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var user = await _userManager.FindByIdAsync(uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            var result = await _userManager.SetTwoFactorEnabledAsync(user, request.Enabled);
+            if (!result.Succeeded)
+            {
+                return BadRequest(new { error = "Unable to update two-factor authentication.", details = result.Errors.Select(e => e.Description) });
+            }
+
+            return Ok(new { enabled = user.TwoFactorEnabled });
+        }
+
+        [HttpPut("security/password")]
+        public async Task<IActionResult> ChangePassword([FromBody] ChangePasswordRequest request)
+        {
+            if (request is null
+                || string.IsNullOrWhiteSpace(request.NewPassword)
+                || !string.Equals(request.NewPassword, request.ConfirmPassword, StringComparison.Ordinal))
+            {
+                return BadRequest(new { error = "A matching new password and confirmation are required." });
+            }
+
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var user = await _userManager.FindByIdAsync(uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            var result = await _userManager.HasPasswordAsync(user)
+                ? await _userManager.ChangePasswordAsync(user, request.CurrentPassword, request.NewPassword)
+                : await _userManager.AddPasswordAsync(user, request.NewPassword);
+            if (!result.Succeeded)
+            {
+                return BadRequest(new { error = "Unable to change the password.", details = result.Errors.Select(e => e.Description) });
+            }
+
+            return NoContent();
+        }
+
+        [HttpDelete("security/external-logins")]
+        public async Task<IActionResult> RemoveExternalLogin([FromQuery] string provider, [FromQuery] string providerKey)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            if (string.IsNullOrWhiteSpace(provider) || string.IsNullOrWhiteSpace(providerKey))
+            {
+                return BadRequest(new { error = "A provider and provider key are required." });
+            }
+
+            var user = await _userManager.FindByIdAsync(uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            if (await _userManager.GetLoginsAsync(user) is { Count: <= 1 }
+                && !await _userManager.HasPasswordAsync(user))
+            {
+                return Conflict(new { error = "Add a password before removing the only sign-in method." });
+            }
+
+            var result = await _userManager.RemoveLoginAsync(user, provider, providerKey);
+            if (!result.Succeeded)
+            {
+                return BadRequest(new { error = "Unable to remove the external login.", details = result.Errors.Select(e => e.Description) });
+            }
+
+            return NoContent();
+        }
+
+        [HttpDelete("me")]
+        public async Task<IActionResult> DeleteMyAccount([FromBody] DeleteAccountRequest request)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var user = await _userManager.FindByIdAsync(uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            if (!string.Equals(request?.UsernameConfirmation, user.UserName, StringComparison.Ordinal))
+            {
+                return BadRequest(new { error = "Type your exact username to confirm account deletion." });
+            }
+
+            _dbContext.DeviceDeclaration.RemoveRange(
+                _dbContext.DeviceDeclaration.Where(device => device.DeviceOwnerId == uid));
+            var result = await _userManager.DeleteAsync(user);
+            if (!result.Succeeded)
+            {
+                return BadRequest(new { error = "Unable to delete this account.", details = result.Errors.Select(e => e.Description) });
+            }
+
+            return NoContent();
+        }
+
+        [HttpPost("email/confirmation")]
+        public async Task<IActionResult> SendEmailConfirmation()
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var user = await _userManager.FindByIdAsync(uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            if (user.EmailConfirmed)
+            {
+                return Conflict(new { error = "This email address is already confirmed." });
+            }
+
+            if (string.IsNullOrWhiteSpace(user.Email))
+            {
+                return BadRequest(new { error = "No email address is associated with this account." });
+            }
+
+            var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
+            var confirmationUrl = new Uri(
+                new Uri(siteSettings.ExternalUrl.TrimEnd('/') + "/", UriKind.Absolute),
+                "Account/ConfirmEmail").ToString();
+            confirmationUrl = Microsoft.AspNetCore.WebUtilities.QueryHelpers.AddQueryString(
+                confirmationUrl,
+                new Dictionary<string, string?> { ["userId"] = user.Id, ["code"] = code });
+
+            await _emailSender.SendEmailAsync(
+                user.UserName ?? user.Email,
+                user.Email,
+                $"[{siteSettings.Title}] Confirmation de votre adresse e-mail",
+                $"<p>Confirmez votre adresse e-mail en suivant ce lien :</p><p><a href=\"{System.Text.Encodings.Web.HtmlEncoder.Default.Encode(confirmationUrl)}\">Confirmer mon adresse</a></p>");
+
+            return Ok(new { message = "Un e-mail de confirmation a été envoyé." });
+        }
+
+        [HttpGet("calendars")]
+        public async Task<IActionResult> GetCalendars([FromQuery] string? pageToken = null)
+        {
+            var calendars = await _calendarManager.GetCalendarsAsync(pageToken ?? string.Empty);
+            var options = (calendars.Items ?? [])
+                .Where(calendar => string.Equals(calendar.AccessRole, "owner", StringComparison.OrdinalIgnoreCase))
+                .Select(calendar => new CalendarOption
+                {
+                    Id = calendar.Id,
+                    Name = calendar.Summary ?? calendar.Id
+                })
+                .ToArray();
+            return Ok(options);
+        }
+
+        [HttpGet("bank-info")]
+        public async Task<IActionResult> GetBankInfo()
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var accounts = await _dbContext.BankIdentity
+                .AsNoTracking()
+                .Where(bank => bank.UserId == uid)
+                .Select(bank => new BankAccountInfo
+                {
+                    Id = bank.Id,
+                    IBAN = bank.IBAN,
+                    BIC = bank.BIC,
+                    BankCode = bank.BankCode,
+                    WicketCode = bank.WicketCode,
+                    AccountNumber = bank.AccountNumber,
+                    BankedKey = bank.BankedKey
+                })
+                .ToArrayAsync();
+            return Ok(accounts);
+        }
+
+        [HttpPost("bank-info")]
+        public async Task<IActionResult> AddBankInfo([FromBody] BankAccountInfoRequest request)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            if (!IsValidBankAccountRequest(request))
+            {
+                return BadRequest(new { error = "Provide an IBAN or BIC and ensure each bank field fits its allowed length." });
+            }
+
+            var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.Id == uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            var bank = new Yavsc.Models.Bank.BankIdentity
+            {
+                UserId = uid,
+                User = user,
+                IBAN = request.IBAN?.Trim() ?? string.Empty,
+                BIC = request.BIC?.Trim() ?? string.Empty,
+                BankCode = request.BankCode?.Trim() ?? string.Empty,
+                WicketCode = request.WicketCode?.Trim() ?? string.Empty,
+                AccountNumber = request.AccountNumber?.Trim() ?? string.Empty,
+                BankedKey = request.BankedKey
+            };
+            _dbContext.BankIdentity.Add(bank);
+            await _dbContext.SaveChangesAsync(uid);
+            return Ok(new BankAccountInfo
+            {
+                Id = bank.Id,
+                IBAN = bank.IBAN,
+                BIC = bank.BIC,
+                BankCode = bank.BankCode,
+                WicketCode = bank.WicketCode,
+                AccountNumber = bank.AccountNumber,
+                BankedKey = bank.BankedKey
+            });
+        }
+
+        [HttpPut("bank-info/{id:long}")]
+        public async Task<IActionResult> UpdateBankInfo(long id, [FromBody] BankAccountInfoRequest request)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            if (!IsValidBankAccountRequest(request))
+            {
+                return BadRequest(new { error = "Provide an IBAN or BIC and ensure each bank field fits its allowed length." });
+            }
+
+            var bank = await _dbContext.BankIdentity
+                .FirstOrDefaultAsync(item => item.Id == id && item.UserId == uid);
+            if (bank is null)
+            {
+                return NotFound();
+            }
+
+            bank.IBAN = request.IBAN?.Trim() ?? string.Empty;
+            bank.BIC = request.BIC?.Trim() ?? string.Empty;
+            bank.BankCode = request.BankCode?.Trim() ?? string.Empty;
+            bank.WicketCode = request.WicketCode?.Trim() ?? string.Empty;
+            bank.AccountNumber = request.AccountNumber?.Trim() ?? string.Empty;
+            bank.BankedKey = request.BankedKey;
+            await _dbContext.SaveChangesAsync(uid);
+            return NoContent();
+        }
+
+        private static bool IsValidBankAccountRequest(BankAccountInfoRequest? request) =>
+            request is not null
+            && (!string.IsNullOrWhiteSpace(request.IBAN) || !string.IsNullOrWhiteSpace(request.BIC))
+            && (request.IBAN?.Length ?? 0) <= 33
+            && (request.BIC?.Length ?? 0) <= 15
+            && (request.BankCode?.Length ?? 0) <= 5
+            && (request.WicketCode?.Length ?? 0) <= 5
+            && (request.AccountNumber?.Length ?? 0) <= 15
+            && request.BankedKey >= 0;
+
+        [HttpDelete("bank-info/{id:long}")]
+        public async Task<IActionResult> DeleteBankInfo(long id)
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var bank = await _dbContext.BankIdentity
+                .FirstOrDefaultAsync(item => item.Id == id && item.UserId == uid);
+            if (bank is null)
+            {
+                return NotFound();
+            }
+
+            _dbContext.BankIdentity.Remove(bank);
+            await _dbContext.SaveChangesAsync(uid);
+            return NoContent();
+        }
+
+        [HttpGet("performer-profile")]
+        public async Task<IActionResult> GetPerformerProfile()
+        {
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            var profile = await _dbContext.Performers
+                .AsNoTracking()
+                .FirstOrDefaultAsync(p => p.PerformerId == uid);
+
+            var selectedActivityCodes = await _dbContext.UserActivities
+                .AsNoTracking()
+                .Where(x => x.UserId == uid)
+                .Select(x => x.DoesCode)
+                .ToListAsync();
+
+            return Ok(new PerformerProfileSettings
+            {
+                PerformerId = uid,
+                UserName = User.Identity?.Name ?? string.Empty,
+                ExerciseCountryCode = profile?.ExerciseCountryCode ?? "fr",
+                SIREN = profile?.SIREN ?? string.Empty,
+                WebSite = profile?.WebSite ?? string.Empty,
+                Active = profile?.Active ?? false,
+                AcceptNotifications = profile?.AcceptNotifications ?? false,
+                AcceptPublicContact = profile?.AcceptPublicContact ?? false,
+                UseGeoLocalizationToReduceDistanceWithClients = profile?.UseGeoLocalizationToReduceDistanceWithClients ?? false,
+                SelectedActivityCodes = selectedActivityCodes
+            });
+        }
+
+        [HttpPut("performer-profile")]
+        public async Task<IActionResult> SavePerformerProfile([FromBody] PerformerProfileSettings model)
+        {
+            if (model is null)
+            {
+                return BadRequest(new { error = "Payload is required." });
+            }
+
+            var uid = User.GetUserId();
+            if (string.IsNullOrWhiteSpace(uid))
+            {
+                return Challenge();
+            }
+
+            if (string.IsNullOrWhiteSpace(model.PerformerId))
+            {
+                model.PerformerId = uid;
+            }
+
+            if (!string.Equals(model.PerformerId, uid, StringComparison.Ordinal))
+            {
+                return Forbid();
+            }
+
+            var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.Id == uid);
+            if (user is null)
+            {
+                return NotFound();
+            }
+
+            if (string.IsNullOrWhiteSpace(model.ExerciseCountryCode))
+            {
+                model.ExerciseCountryCode = "fr";
+            }
+
+            var profile = await _dbContext.Performers.FirstOrDefaultAsync(p => p.PerformerId == uid);
+            if (profile is null)
+            {
+                profile = new Yavsc.Models.Workflow.PerformerProfile
+                {
+                    PerformerId = uid,
+                    Performer = user,
+                    ExerciseCountryCode = model.ExerciseCountryCode,
+                    SIREN = model.SIREN ?? string.Empty,
+                    WebSite = model.WebSite ?? string.Empty,
+                    Active = model.Active,
+                    AcceptNotifications = model.AcceptNotifications,
+                    AcceptPublicContact = model.AcceptPublicContact,
+                    UseGeoLocalizationToReduceDistanceWithClients = model.UseGeoLocalizationToReduceDistanceWithClients,
+                    OrganizationAddress = new Yavsc.Models.Relationship.Location()
+                };
+                _dbContext.Performers.Add(profile);
+            }
+            else
+            {
+                profile.ExerciseCountryCode = model.ExerciseCountryCode;
+                profile.SIREN = model.SIREN ?? string.Empty;
+                profile.WebSite = model.WebSite ?? string.Empty;
+                profile.Active = model.Active;
+                profile.AcceptNotifications = model.AcceptNotifications;
+                profile.AcceptPublicContact = model.AcceptPublicContact;
+                profile.UseGeoLocalizationToReduceDistanceWithClients = model.UseGeoLocalizationToReduceDistanceWithClients;
+            }
+
+            var desiredCodes = (model.SelectedActivityCodes ?? [])
+                .Where(code => !string.IsNullOrWhiteSpace(code))
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .ToList();
+
+            var existingLinks = await _dbContext.UserActivities
+                .Where(x => x.UserId == uid)
+                .ToListAsync();
+
+            foreach (var link in existingLinks)
+            {
+                if (!desiredCodes.Contains(link.DoesCode, StringComparer.OrdinalIgnoreCase))
+                {
+                    _dbContext.UserActivities.Remove(link);
+                }
+            }
+
+            foreach (var code in desiredCodes)
+            {
+                if (existingLinks.Any(x => string.Equals(x.DoesCode, code, StringComparison.OrdinalIgnoreCase)))
+                {
+                    continue;
+                }
+
+                var activity = await _dbContext.Activities
+                    .FirstOrDefaultAsync(a => a.Code == code);
+
+                if (activity is not null)
+                {
+                    _dbContext.UserActivities.Add(new Yavsc.Models.Workflow.UserActivity
+                    {
+                        UserId = uid,
+                        DoesCode = activity.Code,
+                        Weight = 100
+                    });
+                }
+            }
+
+            await _dbContext.SaveChangesAsync(uid);
+
+            if (!User.IsInRole("Performer"))
+            {
+                var roleResult = await _userManager.AddToRoleAsync(user, "Performer");
+                if (!roleResult.Succeeded)
+                {
+                    return BadRequest(new { error = "Performer role could not be assigned.", details = roleResult.Errors.Select(e => e.Description) });
+                }
+            }
+
+            return Ok(new { status = "saved", performer = model });
+        }
+
         [HttpGet("myhost")]
         public IActionResult MyHost ()
         {

src/Yavsc.Api/Controllers/accounting/ApplicationUserApiController.cs

@@ -22,22 +22,49 @@ namespace Yavsc.Controllers
         [HttpGet]
         public IEnumerable<UserInfo> GetApplicationUser(int skip=0, int take = 25)
         {
-            return _context.Users.Skip(skip).Take(take)
+            return _context.Users
-            .Select(u=> new UserInfo{
+                .Include(u => u.PostalAddress)
-            UserId = u.Id,
+                .Include(u => u.BankInfo)
-            UserName = u.UserName,
+                .Skip(skip).Take(take)
-            Avatar = u.Avatar});
+                .Select(u => new UserInfo
+                {
+                    UserId = u.Id,
+                    UserName = u.UserName,
+                    FullName = u.FullName,
+                    Email = u.Email,
+                    Address = u.PostalAddress != null ? u.PostalAddress.Address : string.Empty,
+                    Avatar = u.Avatar,
+                    DedicatedGoogleCalendar = u.DedicatedGoogleCalendar,
+                    BankInfoSummary = u.BankInfo != null && u.BankInfo.Count > 0
+                        ? string.Join(" | ", u.BankInfo.Select(b => string.IsNullOrWhiteSpace(b.IBAN) ? b.BIC : $"{b.IBAN} / {b.BIC}"))
+                        : string.Empty
+                });
         }
 
         [HttpGet("search/{pattern}")]
         public IEnumerable<UserInfo> SearchApplicationUser(string pattern, int skip=0, int take = 25)
         {
-            return _context.Users.Where(u => u.UserName.Contains(pattern))
+            var normalizedPattern = pattern ?? string.Empty;
-            .Skip(skip).Take(take)
+            return _context.Users
-            .Select(u=> new UserInfo {
+                .Include(u => u.PostalAddress)
-            UserId = u.Id,
+                .Include(u => u.BankInfo)
-            UserName = u.UserName,
+                .Where(u => u.UserName.Contains(normalizedPattern)
-            Avatar = u.Avatar   });
+                    || (u.FullName != null && u.FullName.Contains(normalizedPattern))
+                    || (u.Email != null && u.Email.Contains(normalizedPattern)))
+                .Skip(skip).Take(take)
+                .Select(u => new UserInfo
+                {
+                    UserId = u.Id,
+                    UserName = u.UserName,
+                    FullName = u.FullName,
+                    Email = u.Email,
+                    Address = u.PostalAddress != null ? u.PostalAddress.Address : string.Empty,
+                    Avatar = u.Avatar,
+                    DedicatedGoogleCalendar = u.DedicatedGoogleCalendar,
+                    BankInfoSummary = u.BankInfo != null && u.BankInfo.Count > 0
+                        ? string.Join(" | ", u.BankInfo.Select(b => string.IsNullOrWhiteSpace(b.IBAN) ? b.BIC : $"{b.IBAN} / {b.BIC}"))
+                        : string.Empty
+                });
         }
 
         // GET: api/ApplicationUserApi/5

src/Yavsc.Api/Program.cs

@@ -1,6 +1,7 @@
 
 using Anthropic.SDK;
 using IdentityModel;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 using Yavsc.Abstract.Interfaces;
@@ -54,6 +55,13 @@ internal class Program
                         .RequireAuthenticatedUser()
                         .RequireClaim(JwtClaimTypes.Scope, new string[] { "api" });
                 });
+
+                options.AddPolicy("AdministratorOnly", policy =>
+                {
+                    policy
+                        .RequireAuthenticatedUser()
+                        .RequireClaim(Constants.RoleClaimType, Constants.AdminGroupName);
+                });
             })
             .AddYavscCors(builder.Configuration)
             .AddControllersWithViews();
@@ -79,6 +87,16 @@ internal class Program
            options.UseNpgsql(builder.Configuration.GetConnectionString(
             Yavsc.Constants.YavscConnectionStringName)));
 
+        services.AddIdentityCore<ApplicationUser>(options =>
+            {
+                options.ClaimsIdentity.UserNameClaimType = JwtClaimTypes.PreferredUserName;
+                options.ClaimsIdentity.RoleClaimType = Constants.RoleClaimType;
+            })
+            .AddRoles<IdentityRole>()
+            .AddEntityFrameworkStores<ApplicationDbContext>()
+            .AddDefaultTokenProviders()
+            .AddSignInManager();
+
         services.AddLocalization(options =>
         {
             options.ResourcesPath = "Resources";
@@ -116,6 +134,7 @@ internal class Program
             if (app.Environment.IsDevelopment())
                 app.UseDeveloperExceptionPage();
 
+            app.UseMiddleware<ResourceUsageTelemetryMiddleware>();
             app
                 .UseRouting()
                 .UseAuthentication()

src/Yavsc.Blogs/Controllers/FileSystemApiController.cs

@@ -99,7 +99,7 @@ namespace Yavsc.Blogs.Controllers
         }
 
         [HttpPost("{*subdir}")]
-        public IActionResult Post([ValidRemoteUserFilePath] string subdir="")
+        public async Task<IActionResult> Post([ValidRemoteUserFilePath] string subdir="")
         {
             if (!ModelState.IsValid) return new BadRequestObjectResult(ModelState);
             string destDir = null;
@@ -159,6 +159,14 @@ namespace Yavsc.Blogs.Controllers
                     item.Length = f.Length;
                     item.ContentType = f.ContentType;
                 }
+
+                await ResourceUsageTracker.RecordAsync(
+                    dbContext,
+                    uid,
+                    user.UserName,
+                    storageBytes: item.Length,
+                    actorUserId: uid);
+
                 received.Add(item);
                 _logger.LogInformation($"Received  '{item.FileName}'.");
                 if (item.QuotaOffense)

src/Yavsc.Blogs/Program.cs

@@ -83,7 +83,7 @@ internal class Program
             .AddSupportedCultures(supportedCultures)
             .AddSupportedUICultures(supportedCultures);
         })
-        .Configure<SiteSettings>(settings => 
+        .Configure<SiteSettings>(settings =>
         {
             if (settings.Blog == null)
             {
@@ -98,6 +98,7 @@ internal class Program
         {
             if (app.Environment.IsDevelopment())
                 app.UseDeveloperExceptionPage();
+            app.UseMiddleware<ResourceUsageTelemetryMiddleware>();
             app
                 .UseRouting()
                 .UseAuthentication()

src/Yavsc.Org/Migrations/20261007011348_ResourceUsageRecords.cs

@@ -0,0 +1,53 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Yavsc.Migrations
+{
+    /// <inheritdoc />
+    public partial class ResourceUsageRecords : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "ResourceUsageRecords",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    UserId = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
+                    UserName = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
+                    RecordedAtUtc = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    ApiCalls = table.Column<decimal>(type: "numeric", nullable: false),
+                    CpuSeconds = table.Column<decimal>(type: "numeric", nullable: false),
+                    BandwidthMb = table.Column<decimal>(type: "numeric", nullable: false),
+                    StorageMb = table.Column<decimal>(type: "numeric", nullable: false),
+                    EstimatedCompensation = table.Column<decimal>(type: "numeric", nullable: false),
+                    Currency = table.Column<string>(type: "character varying(8)", maxLength: 8, nullable: false, defaultValue: "EUR"),
+                    DateCreated = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    UserCreated = table.Column<string>(type: "text", nullable: true),
+                    DateModified = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    UserModified = table.Column<string>(type: "text", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ResourceUsageRecords", x => x.Id);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ResourceUsageRecords_UserId_RecordedAtUtc",
+                table: "ResourceUsageRecords",
+                columns: new[] { "UserId", "RecordedAtUtc" });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ResourceUsageRecords");
+        }
+    }
+}

src/Yavsc.Org/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -2821,6 +2821,68 @@ namespace Yavsc.Migrations
                     b.ToTable("Tags");
                 });
 
+            modelBuilder.Entity("Yavsc.Models.ResourceUsageRecord", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<decimal>("ApiCalls")
+                        .HasColumnType("numeric");
+
+                    b.Property<decimal>("BandwidthMb")
+                        .HasColumnType("numeric");
+
+                    b.Property<decimal>("CpuSeconds")
+                        .HasColumnType("numeric");
+
+                    b.Property<string>("Currency")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(8)
+                        .HasColumnType("character varying(8)")
+                        .HasDefaultValue("EUR");
+
+                    b.Property<DateTime>("DateCreated")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime>("DateModified")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<decimal>("EstimatedCompensation")
+                        .HasColumnType("numeric");
+
+                    b.Property<DateTime>("RecordedAtUtc")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<decimal>("StorageMb")
+                        .HasColumnType("numeric");
+
+                    b.Property<string>("UserCreated")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("UserModified")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserName")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId", "RecordedAtUtc");
+
+                    b.ToTable("ResourceUsageRecords");
+                });
+
             modelBuilder.Entity("Yavsc.Models.Skill", b =>
                 {
                     b.Property<long>("Id")

src/Yavsc.Server/Helpers/ResourceUsageTelemetryMiddleware.cs

@@ -0,0 +1,54 @@
+#nullable enable
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
+using Yavsc.Models;
+
+namespace Yavsc.Server.Helpers;
+
+public sealed class ResourceUsageTelemetryMiddleware
+{
+    private readonly RequestDelegate _next;
+    private readonly IServiceScopeFactory _scopeFactory;
+
+    public ResourceUsageTelemetryMiddleware(
+        RequestDelegate next,
+        IServiceScopeFactory scopeFactory)
+    {
+        _next = next;
+        _scopeFactory = scopeFactory;
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        var userId = context.User.GetUserId();
+        if (string.IsNullOrWhiteSpace(userId))
+        {
+            await _next(context);
+            return;
+        }
+
+        var userName = context.User.Identity?.Name ?? userId;
+        var requestBytes = context.Request.ContentLength ?? 0L;
+
+        try
+        {
+            await _next(context);
+        }
+        finally
+        {
+            var responseBytes = context.Response.ContentLength ?? 0L;
+            var totalBytes = requestBytes + responseBytes;
+            var bandwidthMb = totalBytes <= 0 ? 0m : (decimal)totalBytes / (1024m * 1024m);
+
+            using var scope = _scopeFactory.CreateScope();
+            var db = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+            await ResourceUsageTracker.RecordAsync(
+                db,
+                userId,
+                userName,
+                apiCalls: 1m,
+                bandwidthMb: bandwidthMb,
+                actorUserId: userId);
+        }
+    }
+}

src/Yavsc.Server/Helpers/ResourceUsageTracker.cs

@@ -0,0 +1,69 @@
+#nullable enable
+using Microsoft.EntityFrameworkCore;
+using Yavsc.Models;
+
+namespace Yavsc.Server.Helpers;
+
+public static class ResourceUsageTracker
+{
+    public static async Task RecordAsync(
+        ApplicationDbContext dbContext,
+        string userId,
+        string userName,
+        decimal cpuSeconds = 0m,
+        long storageBytes = 0,
+        decimal apiCalls = 0m,
+        decimal bandwidthMb = 0m,
+        string? actorUserId = null,
+        string currency = Constants.ResourceUsageDefaultCurrency)
+    {
+        if (dbContext is null || string.IsNullOrWhiteSpace(userId))
+        {
+            return;
+        }
+
+        var effectiveActor = string.IsNullOrWhiteSpace(actorUserId) ? userId : actorUserId;
+        var now = DateTime.UtcNow;
+        var storageMb = storageBytes <= 0 ? 0m : (decimal)storageBytes / (1024m * 1024m);
+
+        var record = await dbContext.ResourceUsageRecords
+            .Where(r => r.UserId == userId)
+            .OrderByDescending(r => r.RecordedAtUtc)
+            .FirstOrDefaultAsync();
+
+        if (record is null)
+        {
+            record = new ResourceUsageRecord
+            {
+                UserId = userId,
+                UserName = string.IsNullOrWhiteSpace(userName) ? userId : userName,
+                RecordedAtUtc = now,
+                ApiCalls = apiCalls,
+                CpuSeconds = cpuSeconds,
+                BandwidthMb = bandwidthMb,
+                StorageMb = storageMb,
+                EstimatedCompensation = 0m,
+                Currency = currency,
+                UserCreated = effectiveActor,
+                UserModified = effectiveActor,
+                DateCreated = now,
+                DateModified = now,
+            };
+            dbContext.ResourceUsageRecords.Add(record);
+            await dbContext.SaveChangesAsync(effectiveActor);
+            return;
+        }
+
+        record.UserName = string.IsNullOrWhiteSpace(userName) ? record.UserName : userName;
+        record.RecordedAtUtc = now;
+        record.ApiCalls += apiCalls;
+        record.CpuSeconds += cpuSeconds;
+        record.BandwidthMb += bandwidthMb;
+        record.StorageMb += storageMb;
+        record.Currency = string.IsNullOrWhiteSpace(currency) ? record.Currency : currency;
+        record.DateModified = now;
+        record.UserModified = effectiveActor;
+
+        await dbContext.SaveChangesAsync(effectiveActor);
+    }
+}

src/Yavsc.Server/Models/ApplicationDbContext.cs

@@ -58,6 +58,14 @@ namespace Yavsc.Models
             }
             builder.UseIdentityByDefaultColumns();
 
+            builder.Entity<ResourceUsageRecord>(entity =>
+            {
+                entity.HasKey(r => r.Id);
+                entity.HasIndex(r => new { r.UserId, r.RecordedAtUtc });
+                entity.Property(r => r.Currency).HasMaxLength(8).HasDefaultValue(Constants.ResourceUsageDefaultCurrency);
+                entity.Property(r => r.UserName).HasMaxLength(256);
+            });
+
             // Customize the ASP.NET Identity model and override the defaults if needed.
             // For example, you can rename the ASP.NET Identity table names and more.
             // Add your customizations after calling base.OnModelCreating(builder);
@@ -324,6 +332,7 @@ namespace Yavsc.Models
 
         public DbSet<Estimate> Estimates { get; set; }
         public DbSet<Signature> Signatures { get; set; }
+        public DbSet<ResourceUsageRecord> ResourceUsageRecords { get; set; }
         public DbSet<AccountBalance> BankStatus { get; set; }
         public DbSet<BalanceImpact> BalanceImpact { get; set; }
 

src/Yavsc.Server/Models/ResourceUsageRecord.cs

@@ -0,0 +1,36 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Yavsc.Models;
+
+public sealed class ResourceUsageRecord : ITrackedEntity
+{
+    [Key]
+    public long Id { get; set; }
+
+    [Required]
+    [MaxLength(256)]
+    public string UserId { get; set; } = string.Empty;
+
+    [Required]
+    [MaxLength(256)]
+    public string UserName { get; set; } = string.Empty;
+
+    [Required]
+    public DateTime RecordedAtUtc { get; set; } = DateTime.UtcNow;
+
+    public decimal ApiCalls { get; set; }
+    public decimal CpuSeconds { get; set; }
+    public decimal BandwidthMb { get; set; }
+    public decimal StorageMb { get; set; }
+    public decimal EstimatedCompensation { get; set; }
+
+    [Required]
+    [MaxLength(8)]
+    public string Currency { get; set; } = Constants.ResourceUsageDefaultCurrency;
+
+    public DateTime DateCreated { get; set; } = DateTime.UtcNow;
+    public string UserCreated { get; set; } = string.Empty;
+    public DateTime DateModified { get; set; } = DateTime.UtcNow;
+    public string UserModified { get; set; } = string.Empty;
+}

src/Yavsc.Server/ViewModels/Account/Me.cs

@@ -3,7 +3,7 @@ using Yavsc.Abstract.Identity;
 namespace Yavsc.Models.Auth
 {
     public class Me : IApplicationUser {
-        public Me(string userId, string userName, string email, string avatar, ILocation address, string gCalId)
+        public Me(string userId, string userName, string email, string avatar, ILocation address, string gCalId, string? fullName = null)
         {
            Id = userId;
            UserName = userName;
@@ -11,10 +11,16 @@ namespace Yavsc.Models.Auth
            Avatar = avatar;
            PostalAddress = address;
            DedicatedGoogleCalendar = gCalId;
+           FullName = fullName ?? string.Empty;
+           Address = address?.Address ?? string.Empty;
+           BankInfoSummary = string.Empty;
         }
         public string Id { get;  set; }
         public string UserName { get; set; }
+        public string FullName { get; set; }
         public string EMail { get; set; }
+        public string Address { get; set; }
+        public string? BankInfoSummary { get; set; }
         public string[] Roles { get; set; }
         /// <summary>
         /// Known as profile, could point to an avatar
@@ -24,18 +30,18 @@ namespace Yavsc.Models.Auth
 
         public IAccountBalance AccountBalance
         {
-            get; set; 
+            get; set;
         }
 
         public string DedicatedGoogleCalendar
         {
-            get; set; 
+            get; set;
         }
 
         public ILocation PostalAddress
         {
-            get; set; 
+            get; set;
         }
     }
 
-}
+}

src/test/Yavsc.Api.Tests/Fixtures/ApiWebServerFixture.cs

@@ -66,7 +66,14 @@ public sealed class ApiWebServerFixture : WebHostFixture
         builder.Services.Configure<GoogleAuthSettings>(_ => { });
         builder.Services.AddTransient<IBillingService, BillingService>();
         builder.Services.AddTransient<IYavscMessageSender, NoopMessageSender>();
-        builder.Services.AddAuthorization();
+        builder.Services.AddAuthorization(options =>
+        {
+            options.AddPolicy("AdministratorOnly", policy =>
+            {
+                policy.RequireAuthenticatedUser();
+                policy.RequireClaim(Yavsc.Constants.RoleClaimType, Yavsc.Constants.AdminGroupName);
+            });
+        });
 
         builder.Services.AddAuthentication("Bearer")
             .AddJwtBearer("Bearer", options =>

src/test/Yavsc.Api.Tests/ResourceUsageApiControllerTests.cs

@@ -0,0 +1,124 @@
+using System.Net;
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using System.Security.Claims;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using Yavsc.Abstract.Resources;
+using Yavsc.Api.Test.Fixtures;
+using Yavsc.Server.Helpers;
+using Yavsc.Tests.Shared;
+
+namespace Yavsc.Api.Test;
+
+[Collection("Yavsc Api")]
+public sealed class ResourceUsageApiControllerTests : IClassFixture<ApiWebServerFixture>
+{
+    private readonly ApiWebServerFixture _fixture;
+
+    public ResourceUsageApiControllerTests(ApiWebServerFixture fixture)
+    {
+        _fixture = fixture;
+    }
+
+    private static HttpClient NewClient(ApiWebServerFixture fixture, string subject = "alice", string scope = "api", IEnumerable<Claim>? extraClaims = null)
+    {
+        var handler = new HttpClientHandler
+        {
+            ServerCertificateCustomValidationCallback = (_, _, _, _) => true
+        };
+
+        var http = new HttpClient(handler)
+        {
+            BaseAddress = new Uri(fixture.BaseAddress)
+        };
+
+        http.DefaultRequestHeaders.Authorization =
+            new AuthenticationHeaderValue("Bearer", TestTokenIssuer.Issue(subject, scope, extraClaims: extraClaims));
+
+        return http;
+    }
+
+    [Fact]
+    public async Task GetCurrentUserUsage_persists_snapshot_in_database()
+    {
+        using var http = NewClient(_fixture, "alice");
+
+        var response = await http.GetAsync("/api/v1/resource-usage/me", TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+        var summary = await response.Content.ReadFromJsonAsync<ResourceUsageSummary>(TestContext.Current.CancellationToken);
+        Assert.NotNull(summary);
+        Assert.Equal("alice", summary!.UserId);
+
+        using var scope = _fixture.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<Yavsc.Models.ApplicationDbContext>();
+        Assert.Contains(db.ResourceUsageRecords, r => r.UserId == "alice");
+    }
+
+    [Fact]
+    public async Task RecordAsync_persists_cpu_and_storage_usage()
+    {
+        using var scope = _fixture.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<Yavsc.Models.ApplicationDbContext>();
+
+        await ResourceUsageTracker.RecordAsync(
+            db,
+            "alice",
+            "alice",
+            cpuSeconds: 1.5m,
+            storageBytes: 2 * 1024 * 1024,
+            actorUserId: "alice");
+
+        var record = await db.ResourceUsageRecords
+            .SingleAsync(r => r.UserId == "alice");
+
+        Assert.True(record.CpuSeconds >= 1.5m);
+        Assert.True(record.StorageMb >= 2m / 1024m / 1024m);
+    }
+
+    [Fact]
+    public async Task RecordAsync_persists_api_and_bandwidth_usage()
+    {
+        using var scope = _fixture.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<Yavsc.Models.ApplicationDbContext>();
+
+        await ResourceUsageTracker.RecordAsync(
+            db,
+            "telemetry-user",
+            "telemetry-user",
+            apiCalls: 2m,
+            bandwidthMb: 3.5m,
+            actorUserId: "telemetry-user");
+
+        var record = await db.ResourceUsageRecords
+            .SingleAsync(r => r.UserId == "telemetry-user");
+
+        Assert.True(record.ApiCalls >= 2m);
+        Assert.True(record.BandwidthMb >= 3.5m);
+    }
+
+    [Fact]
+    public async Task GetAdminOverview_returns_latest_usage_snapshot_for_each_user()
+    {
+        using var http = NewClient(_fixture, "alice");
+        var first = await http.GetAsync("/api/v1/resource-usage/me", TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.OK, first.StatusCode);
+
+        using var adminHttp = NewClient(
+            _fixture,
+            "admin-user",
+            "api",
+            new[]
+            {
+                new Claim(Yavsc.Constants.RoleClaimType, Yavsc.Constants.AdminGroupName)
+            });
+
+        var response = await adminHttp.GetAsync("/api/v1/resource-usage/admin", TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+        var payload = await response.Content.ReadFromJsonAsync<List<ResourceUsageSummary>>(TestContext.Current.CancellationToken);
+        Assert.NotNull(payload);
+        Assert.Contains(payload!, item => item.UserId == "alice");
+    }
+}