新增: Phase2 阶段收尾（Sprint 1-20）

重构：删 5 零引用 crate（df-evolve/plugin/stages/task/traceability）+ 清死模块、ai.rs 拆 11 子 module、ai.ts 拆 6 composable、i18n 拆目录
功能：知识库全栈（df-project/scan + CRUD + 时间线 + 前端）、Settings 拆分、appSettings KV 迁移、模型池、LLM 并发 Semaphore
修复：审批持久化根治、ConditionEngine 默认拒绝、NodeRegistry unimplemented 清除、promote 补偿删除、工具结果截断 50KB、路径校验防 symlink 逃逸
文档：B-03 人工审批设计、决策记录三分档、规格契约自检、经验记录、todo 看板、PROGRESS 更新

详见 PROGRESS.md。src-tauri/儿童每日打卡应用/ 与本项目无关，已排除。

src/composables/ai/useAiWindow.ts

@@ -0,0 +1,167 @@
+//! 窗口分离模式 — detach/reattach/resumeInDetached/closeDetachedWindow/dock/syncToMain/startFollowMain/stopFollowMain
+//!
+//! 模块级私有(不进 reactive):
+//! - _unlistenMove / _unlistenResize: 主窗口 move/resize 跟随的 unlistener
+//!
+//! 耦合:
+//! - detachPanel/resumeInDetached 调 useAiConversations.switchConversation
+//! - resumeInDetached 调 useAiEvents.nextMsgId 占位 ai 气泡
+//! - reattachPanel/detachPanel 调 useAiPanel.persistUiState
+
+import { state } from '../../stores/ai'
+import { nextMsgId } from './useAiEvents'
+import { switchConversation } from './useAiConversations'
+import { persistUiState } from './useAiPanel'
+
+// ── 主窗口事件跟随 unlistener ──
+let _unlistenMove: (() => void) | null = null
+let _unlistenResize: (() => void) | null = null
+
+/** 分离 AI 面板到独立窗口(若已存在则聚焦);快照当前生成态供分离窗口接管 */
+async function detachPanel() {
+  const { WebviewWindow } = await import('@tauri-apps/api/webviewWindow')
+  const existing = await WebviewWindow.getByLabel('ai-detached')
+  if (existing) {
+    await existing.setFocus()
+    return
+  }
+  // 快照当前生成态,供分离窗口接管(保持正在进行的对话)
+  if (state.streaming && state.generatingConvId) {
+    localStorage.setItem('df-ai-gen', state.generatingConvId)
+    localStorage.setItem('df-ai-text', state.currentText)
+  }
+  const convId = state.activeConversationId
+  const sep = convId ? `?conv=${encodeURIComponent(convId)}` : ''
+  const url = window.location.origin + window.location.pathname + '#/ai-detached' + sep
+  const win = new WebviewWindow('ai-detached', {
+    url,
+    title: 'DevFlow AI',
+    width: 520,
+    height: 700,
+    minWidth: 360,
+    minHeight: 400,
+    center: true,
+    decorations: true,
+  })
+  win.once('tauri://created', () => {
+    state.panelOpen = false
+    persistUiState()
+  })
+  win.once('tauri://error', (e) => {
+    console.error('[AI] 窗口创建失败:', e)
+    state.detached = false
+  })
+  win.once('tauri://destroyed', () => {
+    state.detached = false
+    state.docked = false
+    stopFollowMain()
+  })
+  state.detached = true
+}
+
+/** 关闭分离窗口并回到内嵌面板(主窗口侧调用) */
+async function reattachPanel() {
+  stopFollowMain()
+  const { WebviewWindow } = await import('@tauri-apps/api/webviewWindow')
+  const win = await WebviewWindow.getByLabel('ai-detached')
+  if (win) {
+    await win.close()
+  }
+  state.detached = false
+  state.docked = false
+  state.panelOpen = true
+  persistUiState()
+  localStorage.removeItem('df-ai-gen')
+  localStorage.removeItem('df-ai-text')
+}
+
+/** 分离窗口挂载时接管主窗口当前对话(含生成中态) */
+async function resumeInDetached(convId: string | null) {
+  const id = convId || state.activeConversationId
+  if (id) await switchConversation(id)
+  const gen = localStorage.getItem('df-ai-gen')
+  if (gen) {
+    // 接管正在生成的对话:恢复已生成文本并补占位,后续 delta 继续追加
+    state.currentText = localStorage.getItem('df-ai-text') || ''
+    state.messages.push({
+      id: `ai-${nextMsgId()}`,
+      role: 'assistant',
+      content: '',
+      timestamp: Date.now(),
+    })
+    state.streaming = true
+    state.generatingConvId = gen
+  }
+}
+
+/** 关闭分离窗口自身(分离窗口侧调用) */
+async function closeDetachedWindow() {
+  state.docked = false
+  stopFollowMain()
+  localStorage.removeItem('df-ai-gen')
+  localStorage.removeItem('df-ai-text')
+  const { getCurrentWebviewWindow } = await import('@tauri-apps/api/webviewWindow')
+  await getCurrentWebviewWindow().close()
+}
+
+/** 吸附/取消吸附：AI 窗口跟随主窗口右侧 */
+async function dockDetached() {
+  // 取消吸附
+  if (state.docked) {
+    state.docked = false
+    stopFollowMain()
+    return
+  }
+
+  try {
+    await syncToMain()
+    state.docked = true
+    startFollowMain()
+  } catch (e) {
+    console.error('[AI] 吸附失败:', e)
+  }
+}
+
+/** 同步 AI 窗口位置到主窗口右侧（保留 4px 间隙） */
+async function syncToMain() {
+  const { WebviewWindow, getCurrentWebviewWindow } = await import('@tauri-apps/api/webviewWindow')
+  const { PhysicalPosition, PhysicalSize } = await import('@tauri-apps/api/dpi')
+  const mainWin = await WebviewWindow.getByLabel('main')
+  const aiWin = getCurrentWebviewWindow()
+  if (!mainWin) return
+  const pos = await mainWin.outerPosition()
+  const size = await mainWin.innerSize()
+  await aiWin.setPosition(new PhysicalPosition(pos.x + size.width + 4, pos.y))
+  await aiWin.setSize(new PhysicalSize(600, size.height))
+}
+
+/** 启动主窗口 move/resize 跟随(吸附时调用) */
+async function startFollowMain() {
+  stopFollowMain()
+  const { WebviewWindow } = await import('@tauri-apps/api/webviewWindow')
+  const mainWin = await WebviewWindow.getByLabel('main')
+  if (!mainWin) return
+  _unlistenMove = await mainWin.onMoved(() => { void syncToMain() })
+  _unlistenResize = await mainWin.onResized(() => { void syncToMain() })
+}
+
+/** 停止主窗口跟随 */
+function stopFollowMain() {
+  _unlistenMove?.()
+  _unlistenResize?.()
+  _unlistenMove = null
+  _unlistenResize = null
+}
+
+export function useAiWindow() {
+  return {
+    detachPanel,
+    reattachPanel,
+    resumeInDetached,
+    closeDetachedWindow,
+    dockDetached,
+    syncToMain,
+    startFollowMain,
+    stopFollowMain,
+  }
+}