feat(notes): notes get their own list, a day log and an Enter chain

The editor was reachable from one button that only appeared in My Day,
which is how it got forgotten. It is now a permanent sidebar entry next
to My Day and Planned, and it fills the tasks island rather than the
details pane, because a note list is content.

Inside, the date picker is gone: today sits at the top with the capture
box, older days follow as dated groups. Enter in a note saves it and
opens the next one, Shift+Enter breaks the line so notes can be several,
Backspace on an empty note deletes it and steps back up. Deleting also
has a visible hover button instead of only "clear the text and hope".
Agent-written notes carry a marker.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/ClaudeDo.Ui/Services/WorkerNotesApi.cs

@@ -7,6 +7,7 @@ public sealed class WorkerNotesApi : INotesApi
     private readonly IWorkerClient _client;
     public WorkerNotesApi(IWorkerClient client) => _client = client;
     public Task<List<DailyNoteDto>> ListAsync(DateOnly day) => _client.GetDailyNotesAsync(day);
+    public Task<List<DailyNoteDto>> ListBetweenAsync(DateOnly start, DateOnly end) => _client.GetDailyNotesBetweenAsync(start, end);
     public Task<DailyNoteDto?> AddAsync(DateOnly day, string text) => _client.AddDailyNoteAsync(day, text);
     public Task UpdateAsync(string id, string text) => _client.UpdateDailyNoteAsync(id, text);
     public Task DeleteAsync(string id) => _client.DeleteDailyNoteAsync(id);