feat: add task detail slide-over panel with inline editing, subtasks, and notes

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

TaskTracker.Web/src/api/notes.ts

@@ -0,0 +1,12 @@
+import { useMutation, useQueryClient } from '@tanstack/react-query'
+import { request } from './client'
+import type { TaskNote } from '../types'
+
+export function useCreateNote() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: ({ taskId, content, type }: { taskId: number; content: string; type: number }) =>
+      request<TaskNote>({ method: 'POST', url: `/tasks/${taskId}/notes`, data: { content, type } }),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['tasks'] }),
+  })
+}