feat: 重构问问微信并完善知识库增量检索

统一问问微信与 Agent Hub 的查询链路
完善查询覆盖度、新鲜度和部分结果表达，避免索引滞后产生错误结论
基于会话实现真正的增量追新与历史补齐
支持后台同步、取消恢复、重启续传以及同步期间继续查询
优化知识库跨会话检索、同步状态、进度展示和侧栏布局

tests/unit/local-query-tool-executor.test.ts

@@ -0,0 +1,40 @@
+import { describe, expect, it, vi } from 'vitest'
+import { createLocalQueryToolExecutor } from '../../src/main/services/local-query-tool-executor'
+import type { LocalQueryApiService } from '../../src/main/services/local-query-api-service'
+
+function fakeQueryApi(): LocalQueryApiService {
+  return {
+    messages: vi.fn(async () => ({ status: 'completed', returnedCount: 0 })),
+    search: vi.fn(async () => ({ status: 'completed', evidenceCount: 0 })),
+    context: vi.fn(async () => ({ status: 'completed' })),
+    overview: vi.fn(async () => ({ status: 'completed' }))
+  } as unknown as LocalQueryApiService
+}
+
+describe('createLocalQueryToolExecutor', () => {
+  it('把四个 Tool 映射到对应的 Local Query API 能力', async () => {
+    const api = fakeQueryApi()
+    const execute = createLocalQueryToolExecutor(api)
+
+    await execute('query_messages', { target: { query: 'BOBO' }, timeRange: { kind: 'all' } })
+    await execute('search_messages', { query: '房租' })
+    await execute('message_context', { messageRef: 'ref' })
+    await execute('conversation_overview', { target: { query: '群' }, timeRange: { kind: 'all' } })
+
+    expect(api.messages).toHaveBeenCalledWith({ target: { query: 'BOBO' }, timeRange: { kind: 'all' } })
+    expect(api.search).toHaveBeenCalledWith({ query: '房租' })
+    expect(api.context).toHaveBeenCalledWith({ messageRef: 'ref' })
+    expect(api.overview).toHaveBeenCalledWith({
+      target: { query: '群' },
+      timeRange: { kind: 'all' }
+    })
+  })
+
+  it('拒绝未知工具名（不静默落到任意查询）', async () => {
+    const api = fakeQueryApi()
+    const execute = createLocalQueryToolExecutor(api)
+
+    await expect(execute('raw_sql', {})).rejects.toThrow('不允许的工具')
+    expect(api.messages).not.toHaveBeenCalled()
+  })
+})