Add client-side Notes page with API integration and shared contracts

docs/ai/AI_TASKS.md

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+# AI_TASKS.md
+
+Quick task cookbook for common changes in this repo.
+
+## Add a new API endpoint group
+
+1) Create `Freman.Sample.Web/Endpoints/<Feature>Endpoints.cs`
+2) Add an extension method:
+    - `public static IEndpointRouteBuilder Map<Feature>Endpoints(this IEndpointRouteBuilder app)`
+3) Call it from `Freman.Sample.Web/Program.cs`:
+    - `app.Map<Feature>Endpoints();`
+
+## Add a new Client page that calls the API
+
+1) Create page in `Freman.Sample.Web.Client/Pages/<Page>.razor`
+2) Ensure it runs as WASM and avoids server prerender DI issues:
+    - `@rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))`
+3) Inject `HttpClient`:
+    - `@inject HttpClient Http`
+4) Call server endpoints under `/api/*`
+
+## Add shared request/response models
+
+1) Add to `Freman.Sample.Web.Contracts`
+2) Reference contracts project from Server + Client
+3) Use contracts types in endpoints + client code (avoid duplicates)
+
+## Add an EF Core migration
+
+From solution root:
+
+```
+powershell dotnet tool restore
+dotnet tool run dotnet-ef -- migrations add --project .\Freman.Sample.Web\Freman.Sample.Web\Freman.Sample.Web.csproj --startup-project .\Freman.Sample.Web\Freman.Sample.Web\Freman.Sample.Web.csproj ` --output-dir Data\Migrations
+```
+
+## Apply migrations manually (optional)
+
+```
+powershell dotnet tool run dotnet-ef -- database update --project .\Freman.Sample.Web\Freman.Sample.Web\Freman.Sample.Web.csproj --startup-project .\Freman.Sample.Web\Freman.Sample.Web\Freman.Sample.Web.csproj
+```
+
+## Add a confirmation step in the client
+
+Use `Freman.Sample.Web.Client/Components/ConfirmModal.razor` and call:
+
+- `await _confirmModal.ShowAsync("Title", "Message")`