postit: persist settings save and apply ApiUrl changes without restart

src/PostIt/PostIt.Tests/ActivitiesPageViewModelTests.cs

@@ -39,6 +39,22 @@ public class ActivitiesPageViewModelTests
         Assert.Equal("https://business.example/api/v1/billing/Rdv", api.Paths[3]);
     }
 
+    [Fact]
+    public async Task ActivityApiClient_uses_updated_business_base_without_restart()
+    {
+        var api = new StubActivityApi();
+        var baseUrl = "https://business-a.example/api/v1/";
+        var client = new ActivityApiClient(api, () => baseUrl);
+
+        await client.GetCatalogAsync(ct: TestContext.Current.CancellationToken);
+
+        baseUrl = "https://business-b.example/api/v1/";
+        await client.GetUsersAsync("brush", TestContext.Current.CancellationToken);
+
+        Assert.Equal("https://business-a.example/api/v1/activity/catalog", api.Paths[0]);
+        Assert.Equal("https://business-b.example/api/v1/activity/brush/users", api.Paths[1]);
+    }
+
     [Fact]
     public async Task RefreshAsync_loads_first_activity_then_specialization_performers()
     {

src/PostIt/PostIt/Helpers/ServiceCollectionHelpers.cs

@@ -26,9 +26,9 @@ public static class ServiceCollectionHelpers
         var userSearchClient = new UserSearchClient(api, settings.BlogsApiUrl);
         var activityClient = new ActivityApiClient(
             api,
-            settings.ApiUrl,
-            settings.Authentication?.Authority);
-        var billingClient = new BillingApiClient(api, settings.ApiUrl);
+            () => settings.ApiUrl,
+            () => settings.Authentication?.Authority);
+        var billingClient = new BillingApiClient(api, () => settings.ApiUrl);
         var userDirectory = new UserDirectory(userSearchClient);
 
         // Vues

src/PostIt/PostIt/Views/SettingsPage.axaml

@@ -61,16 +61,11 @@
                     Click="ChooseAvatar_Click"
                     Margin="0,0,8,0"/>
 
-            <!-- Sauver: bound to the Save RelayCommand on the Settings
-                 VM. The source generator emits an ICommand property whose
-                 name matches the source method exactly (no "Command"
-                 suffix is added), so we bind {Binding Save} here. See
-                 AGENTS.md "Avalonia + CommunityToolkit.Mvvm : conventions
-                 de binding pour [RelayCommand]" for the full rationale.
-                 IsEnabled tracks IsDirty so the button auto-disables
-                 when there's nothing to persist. -->
+                <!-- Sauver: bind to the RelayCommand-generated property
+                 (SaveCommand). IsEnabled tracks IsDirty so the button
+                 auto-disables when there's nothing to persist. -->
             <Button Content="Sauver"
-                    Command="{Binding Save}"
+                    Command="{Binding SaveCommand}"
                     IsEnabled="{Binding IsDirty}"/>
                 </StackPanel>
         </StackPanel>

src/PostIt/PostIt/postit-settings sample.json

@@ -5,7 +5,7 @@
     },
     "RedirectUri": "postit://callback",
     "DarkMode": false,
-    "ApiUrl": "https://blogs.pschneider.fr/api/v1/",
+    "ApiUrl": "https://api.pschneider.fr/api/v1/",
     "Scopes": [
         "openid",
         "profile",

src/PostIt/PostIt/postit-settings.json

@@ -5,7 +5,7 @@
     },
     "RedirectUri": "postit://callback",
     "DarkMode": true,
-    "ApiUrl": "https://blogs.pschneider.fr/api/v1/",
+    "ApiUrl": "https://api.pschneider.fr/api/v1/",
     "Scopes": [
         "openid",
         "profile",