fix: align frontend status types with API string enum serialization

ASP.NET serializes C# enums as strings by default ("Pending", "Active"),
but frontend types used numeric values (0, 1). Changed WorkTaskStatus and
NoteType to string values matching API output.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TaskTracker.Web/src/api/notes.ts

@@ -5,7 +5,7 @@ import type { TaskNote } from '../types'
 export function useCreateNote() {
   const qc = useQueryClient()
   return useMutation({
-    mutationFn: ({ taskId, content, type }: { taskId: number; content: string; type: number }) =>
+    mutationFn: ({ taskId, content, type }: { taskId: number; content: string; type: string }) =>
       request<TaskNote>({ method: 'POST', url: `/tasks/${taskId}/notes`, data: { content, type } }),
     onSuccess: () => qc.invalidateQueries({ queryKey: ['tasks'] }),
   })