docs: sync CLAUDE.md files with current architecture

Drop the removed tag system, fix the retired Manual status and the atomic
queue-claim location, refresh the App DI registrations to the Islands VMs,
update the Data table list, correct a stale test reference, and document the
interface-folder and single-consumer-fold conventions plus the .NET 8 build path.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CLAUDE.md

@@ -35,18 +35,23 @@ Two-process system communicating over SignalR (`127.0.0.1:47821`):
 - EF Core migrations manage schema (Migrations/ folder in ClaudeDo.Data)
 - `IDbContextFactory<ClaudeDoDbContext>` used by singleton consumers (e.g. Worker)
 - Entity configuration via `IEntityTypeConfiguration<T>` in Configuration/ folder
-- Task status flow: Manual | Queued -> Running -> Done | Failed
+- Task status flow: Idle | Queued -> Running -> Done | Failed | Cancelled
 - Worktree state flow: Active -> Merged | Discarded | Kept
-- Tags "agent" and "manual" are seeded; "agent" tag marks tasks for automated queue pickup
+- The queue picker claims tasks by `Status=Queued` (with `BlockedByTaskId IS NULL`); the legacy tag system was removed
+- Interfaces live in an `Interfaces/` subfolder beside their consumers (namespace unchanged)
+- Small single-consumer helper types live in their consumer's file, not standalone files
 - Commit messages use conventional format: `{commitType}(slug): title`
 - Views use compiled bindings (`x:DataType`)
 - ViewModels use `[ObservableProperty]` and `[RelayCommand]` source generators
 
 ## Building & Testing
 
+`dotnet build ClaudeDo.slnx` requires .NET 9; on .NET 8 build individual projects instead.
+
 ```bash
-dotnet build ClaudeDo.slnx
-dotnet test tests/ClaudeDo.Worker.Tests
+dotnet build src/ClaudeDo.App/ClaudeDo.App.csproj      # pulls in Ui + Data
+dotnet build src/ClaudeDo.Worker/ClaudeDo.Worker.csproj
+dotnet test tests/ClaudeDo.Worker.Tests                # also: Data.Tests, Ui.Tests, Installer.Tests, Releases.Tests
 ```
 
 ## Docs