fix: S1 安全冲刺——切库清空标签页+冲刷(FR-V6)、重命名/移动同步标签页路径(FR-T7)、默认库路径设置页(FR-V5)；vaultBrowse IPC+pickDirectory；tab-store closeAll/renamePath；store resetEditor/syncCurrentPath；safety E2E 2 项

apps/desktop/src/renderer/features/file-tree/FileTree.tsx

@@ -4,9 +4,10 @@ import { useState, useMemo } from 'react';
 import { invoke } from '../../ipc-client';
 import { IPC } from '@hunter/shared';
 import { useDialog } from '../dialog/dialog-store';
+import { useTabs } from '../tabs/tab-store';
 
 export function FileTree() {
-  const { tree, loadTree, treeLoading, openDoc, currentPath } = useStore();
+  const { tree, loadTree, treeLoading, openDoc, currentPath, syncCurrentPath } = useStore();
   const { showInput, showConfirm } = useDialog();
   const [collapsed, setCollapsed] = useState<Set<string>>(new Set());
   const [renaming, setRenaming] = useState<string | null>(null);
@@ -26,7 +27,9 @@ export function FileTree() {
   };
   const doRename = async (node: TreeNode) => {
     const name = await showInput('重命名', '新名称'); if (!name) return;
-    await invoke(IPC.fileRename, { from: node.path, toName: name });
+    const r = await invoke(IPC.fileRename, { from: node.path, toName: name });
+    useTabs.getState().renamePath(node.path, r.path); // FR-T7: 同步标签页路径
+    syncCurrentPath(node.path, r.path);
     await loadTree();
   };
   const doDelete = async (node: TreeNode) => {
@@ -38,7 +41,7 @@ export function FileTree() {
   };
   const doMove = async (src: string, destDir: string) => {
     if (src === destDir) return;
-    try { await invoke(IPC.fileMove, { src, destDir }); await loadTree(); } catch (e) { console.error(e); }
+    try { const r = await invoke(IPC.fileMove, { src, destDir }); useTabs.getState().renamePath(src, r.path); syncCurrentPath(src, r.path); await loadTree(); } catch (e) { console.error(e); }
   };
 
   const onDrop = (e: React.DragEvent, destDir: string) => {
@@ -69,7 +72,7 @@ export function FileTree() {
           <span style={{ width: 14 }}>{n.type === 'folder' ? (isCollapsed ? '▶' : '▼') : '📄'}</span>
           {isRenaming ? (
             <input autoFocus value={renameVal} onChange={e => setRenameVal(e.target.value)}
-              onKeyDown={e => { if (e.key === 'Enter') { setRenaming(null); invoke(IPC.fileRename, { from: n.path, toName: renameVal }).then(() => loadTree()); } if (e.key === 'Escape') setRenaming(null); }}
+              onKeyDown={e => { if (e.key === 'Enter') { setRenaming(null); invoke(IPC.fileRename, { from: n.path, toName: renameVal }).then(r => { useTabs.getState().renamePath(n.path, r.path); syncCurrentPath(n.path, r.path); loadTree(); }); } if (e.key === 'Escape') setRenaming(null); }}
               onBlur={() => setRenaming(null)} style={{ flex: 1, background: '#15151f', border: '1px solid #4a6a8a', color: '#ddd', borderRadius: 3, padding: '1px 4px', fontSize: 13 }} />
           ) : (
             <span style={{ marginLeft: 4, flex: 1 }}>{n.name}</span>
@@ -90,7 +93,7 @@ export function FileTree() {
   const menuNode = menu && tree.find(n => n.path === menu.path);
   const roots = byParent.get('') ?? [];
   return (
-    <div style={{ overflow: 'auto', padding: 8, height: '100%' }} onClick={() => setMenu(null)}>
+    <div data-testid="filetree" style={{ overflow: 'auto', padding: 8, height: '100%' }} onClick={() => setMenu(null)}>
       {treeLoading && <div style={{ opacity: 0.5 }}>加载中…</div>}
       {roots.map(n => renderNode(n, 0))}
       {tree.length === 0 && !treeLoading && <div style={{ opacity: 0.5, fontSize: 12 }}>空库，点击上方「＋ 新建文档」开始</div>}

apps/desktop/src/renderer/features/settings/SettingsPanel.tsx

@@ -1,6 +1,10 @@
 import { useState, useEffect } from 'react';
 import { useSettings } from './settings-store';
 import { useKeymap } from '../keymap/keymap-service';
+import { useStore } from '../../store';
+import { useTabs } from '../tabs/tab-store';
+import { invoke } from '../../ipc-client';
+import { IPC } from '@hunter/shared';
 
 const pageBtn: React.CSSProperties = { padding: '8px 14px', border: 'none', background: 'transparent', color: '#888', cursor: 'pointer', borderBottom: '2px solid transparent', fontSize: 13 };
 const row: React.CSSProperties = { display: 'flex', alignItems: 'center', justifyContent: 'space-between', padding: '10px 0', borderBottom: '1px solid #2a2a3a' };
@@ -54,7 +58,7 @@ export function SettingsPanel({ onClose }: { onClose: () => void }) {
           <div style={row}><span style={lbl}>自动换行</span><button onClick={() => s.set('wordWrap', !s.wordWrap)} style={toggle(s.wordWrap)}><span style={dot(s.wordWrap)} /></button></div>
         </>}
         {page === 'other' && <div style={row}><span style={lbl}>删除前确认</span><button onClick={() => s.set('confirmDelete', !s.confirmDelete)} style={toggle(s.confirmDelete)}><span style={dot(s.confirmDelete)} /></button></div>}
-        {page === 'path' && <div style={{ ...lbl, opacity: 0.6, padding: '12px 0' }}>文件路径设置将在 M9 完善（默认库路径配置）</div>}
+        {page === 'path' && <PathPage />}
         {page === 'keymap' && <>
           <div style={{ ...lbl, opacity: 0.6, marginBottom: 8 }}>点击「录入」后按下新组合键（需含 Ctrl/Meta/Alt）；Esc 取消</div>
           {bindings.map(b => {
@@ -81,3 +85,46 @@ export function SettingsPanel({ onClose }: { onClose: () => void }) {
 
 const sel: React.CSSProperties = { background: '#15151f', border: '1px solid #3a3a4a', color: '#ddd', borderRadius: 4, padding: '4px 8px', fontSize: 13 };
 function dot(on: boolean): React.CSSProperties { return { position: 'absolute', top: 2, left: on ? 18 : 2, width: 16, height: 16, borderRadius: '50%', background: '#fff', transition: 'left 0.2s' }; }
+
+// FR-V5: 默认库路径设置页——查看当前库、浏览选择、立即切换
+function PathPage() {
+  const { vault, loadVault, loadTree } = useStore();
+  const [val, setVal] = useState(vault?.currentRoot ?? '');
+  const [msg, setMsg] = useState('');
+  const browse = async () => { const p = await invoke(IPC.vaultBrowse, undefined as never); if (p) setVal(p); };
+  const apply = async () => {
+    if (!val.trim()) { setMsg('请填写或浏览选择库路径'); return; }
+    try {
+      setMsg('切换中…');
+      await useStore.getState().saveNow();           // 先冲刷未保存到旧库
+      await invoke(IPC.vaultSwitch, { root: val.trim() });
+      useTabs.getState().closeAll();                 // 清空标签页（FR-V6）
+      useStore.getState().resetEditor();             // 重置编辑区
+      await loadVault();
+      await loadTree();
+      setMsg('已切换到：' + val.trim());
+    } catch (e: any) { setMsg('切换失败：' + (e?.message ?? String(e))); }
+  };
+  return (
+    <>
+      <div style={{ ...row, alignItems: 'flex-start' }}>
+        <span style={{ ...lbl, paddingTop: 6 }}>当前库路径</span>
+        <span style={{ fontSize: 12, color: '#9cf', maxWidth: 320, wordBreak: 'break-all', textAlign: 'right' }}>{vault?.currentRoot ?? '—'}</span>
+      </div>
+      <div style={{ ...row, alignItems: 'flex-start' }}>
+        <span style={{ ...lbl, paddingTop: 6 }}>新库路径</span>
+        <span style={{ display: 'flex', gap: 6, flex: 1, justifyContent: 'flex-end' }}>
+          <input value={val} onChange={e => setVal(e.target.value)} placeholder="填写或浏览选择目录…" style={{ ...sel, flex: 1, maxWidth: 220 }} />
+          <button onClick={browse} style={{ ...sel, cursor: 'pointer' }}>浏览…</button>
+        </span>
+      </div>
+      <div style={{ ...row }}>
+        <span style={lbl} />
+        <span style={{ display: 'flex', gap: 8, alignItems: 'center' }}>
+          {msg && <span style={{ fontSize: 12, color: msg.startsWith('切换失败') ? '#f88' : (msg.startsWith('已切换') ? '#8c8' : '#9cf') }}>{msg}</span>}
+          <button onClick={apply} style={{ ...sel, cursor: 'pointer', background: '#2a4a6a', color: '#9cf' }}>立即切换</button>
+        </span>
+      </div>
+    </>
+  );
+}

apps/desktop/src/renderer/features/tabs/TabBar.tsx

@@ -14,7 +14,7 @@ export function TabBar() {
 
   if (tabs.length === 0) return null;
   return (
-    <div style={{ display: 'flex', borderBottom: '1px solid #2a2a3a', background: '#161620', overflowX: 'auto' }}>
+    <div data-testid="tabbar" style={{ display: 'flex', borderBottom: '1px solid #2a2a3a', background: '#161620', overflowX: 'auto' }}>
       {tabs.map(t => (
         <div key={t.id} onClick={() => setActive(t.id)}
           style={{ display: 'flex', alignItems: 'center', gap: 6, padding: '4px 10px', cursor: 'pointer',

apps/desktop/src/renderer/features/tabs/tab-store.ts

@@ -9,6 +9,8 @@ interface TabState {
   closeTab: (id: string) => void;
   setActive: (id: string) => void;
   togglePin: (id: string) => void;
+  closeAll: () => void;            // FR-V6: 切库时清空全部标签页
+  renamePath: (oldPath: string, newPath: string) => void; // FR-T7: 重命名/移动后同步标签页路径
   activePath: () => string | null;
   persist: () => void;
   restore: () => void;
@@ -54,6 +56,20 @@ export const useTabs = create<TabState>((set, get) => ({
     get().persist();
   },
 
+  closeAll: () => { set({ tabs: [], activeId: null }); get().persist(); },
+
+  renamePath: (oldPath, newPath) => {
+    set(s => ({
+      tabs: s.tabs.map(t => {
+        if (t.path === oldPath) return { ...t, path: newPath };
+        // 文件夹重命名/移动：子文档标签页路径前缀替换
+        if (oldPath && t.path.startsWith(oldPath + '/')) return { ...t, path: newPath + t.path.slice(oldPath.length) };
+        return t;
+      }),
+    }));
+    get().persist();
+  },
+
   activePath: () => { const { tabs, activeId } = get(); return tabs.find(t => t.id === activeId)?.path ?? null; },
 
   persist: () => {

apps/desktop/src/renderer/features/toolbar/Toolbar.tsx

@@ -2,6 +2,7 @@ import { useStore } from '../../store';
 import { invoke } from '../../ipc-client';
 import { IPC } from '@hunter/shared';
 import { useDialog } from '../dialog/dialog-store';
+import { useTabs } from '../tabs/tab-store';
 
 // 极简浮层通知（FR-B1，后续抽组件）
 function notify(msg: string) {
@@ -30,7 +31,12 @@ export function Toolbar() {
     await loadTree();
   };
   const switchVault = async () => {
-    await invoke(IPC.vaultPick, undefined as never);
+    // FR-V6: 先冲刷未保存内容到旧库，再切换；取消则保留现状
+    await useStore.getState().saveNow();
+    const picked = await invoke(IPC.vaultPick, undefined as never);
+    if (!picked) return;
+    useTabs.getState().closeAll();
+    useStore.getState().resetEditor();
     await loadVault();
     await loadTree();
   };

apps/desktop/src/renderer/store.ts

@@ -27,6 +27,8 @@ interface EditorState {
   addLink: (link: string) => void;
   removeLink: (link: string) => void;
   saveNow: () => Promise<void>;
+  resetEditor: () => void;                          // FR-V6: 切库时重置编辑区
+  syncCurrentPath: (oldPath: string, newPath: string) => void; // FR-T7: 重命名/移动后同步当前文档路径
 }
 
 // 简单的每文档保存队列（M1 单文档编辑）
@@ -111,4 +113,13 @@ export const useStore = create<EditorState>((set, get) => ({
       console.error('save failed', e);
     }
   },
+
+  resetEditor: () => { set({ currentPath: null, title: '', body: '', meta: {}, saveState: 'saved' }); },
+
+  syncCurrentPath: (oldPath, newPath) => {
+    const { currentPath } = get();
+    if (!currentPath) return;
+    if (currentPath === oldPath) { set({ currentPath: newPath }); return; }
+    if (oldPath && currentPath.startsWith(oldPath + '/')) set({ currentPath: newPath + currentPath.slice(oldPath.length) });
+  },
 }));