重构(应用状态存储): 调整savePaths返回结构化结果并更新所有调用处

- 新增SaveResult类型统一标准化保存操作的结果状态
- 修改savePaths函数返回结构化结果而非布尔值，完善长路径超限、部分失败等场景的处理逻辑，部分失败时重新加载路径避免状态偏移
- 更新useAppActions与ProfileDialog的保存逻辑，适配新API并添加长路径确认弹窗
- 补充相关测试用例，修正导入导出测试的版本号预期

src/components/dialogs/ProfileDialog.tsx

@@ -73,8 +73,19 @@ export function ProfileDialog({ open, onClose }: Props) {
       system: selectedData.sys.filter(e => !e.enabled).map(e => e.path),
       user: selectedData.user.filter(e => !e.enabled).map(e => e.path),
     });
-    await useAppStore.getState().savePaths();
-    onClose();
+    const result = await useAppStore.getState().savePaths();
+    if (result.kind === 'success') {
+      onClose();
+    } else if (result.kind === 'warning') {
+      const { ask } = await import('@tauri-apps/plugin-dialog');
+      const confirmed = await ask(t('status.saveWarningLongPaths'), { title: t('dialog.backupTitle'), kind: 'warning' });
+      if (confirmed) {
+        const forceResult = await useAppStore.getState().savePaths(true);
+        if (forceResult.kind === 'success') {
+          onClose();
+        }
+      }
+    }
   };
 
   const handleDelete = async (name: string) => {

src/hooks/use-app-actions.ts

@@ -118,8 +118,8 @@ export function useAppActions(activeTab: TabId, dialogs: DialogState) {
   }, []);
 
   const handleSave = useCallback(async () => {
-    const saved = await useAppStore.getState().savePaths();
-    if (!saved && !useAppStore.getState().isSaving) {
+    const result = await useAppStore.getState().savePaths();
+    if (result.kind === 'warning') {
       // 长度超限，需要用户确认
       const { ask } = await import('@tauri-apps/plugin-dialog');
       const confirmed = await ask(i18n.t('status.saveWarningLongPaths'), { title: i18n.t('dialog.backupTitle'), kind: 'warning' });

src/store/app-store.ts

@@ -8,6 +8,13 @@ import appConfig from '@/config/default.json';
 
 export type TabId = 'system' | 'user' | 'merged';
 
+export type SaveResult =
+  | { kind: 'success' }
+  | { kind: 'warning'; reason: 'lengthExceeded' }
+  | { kind: 'failure'; message: string }
+  | { kind: 'partial'; message: string }
+  | { kind: 'blocked' };
+
 interface AppState {
   sysPaths: PathEntry[];
   userPaths: PathEntry[];
@@ -45,7 +52,7 @@ interface AppState {
   redo: () => void;
 
   loadPaths: () => Promise<void>;
-  savePaths: (force?: boolean) => Promise<boolean>;
+  savePaths: (force?: boolean) => Promise<SaveResult>;
   initialize: () => Promise<void>;
 
 }
@@ -324,7 +331,7 @@ export const useAppStore = create<AppState>((set, get) => {
 
   savePaths: async (force?: boolean) => {
     const state = get();
-    if (state.isSaving) return false;
+    if (state.isSaving) return { kind: 'blocked' };
     set({ isSaving: true, statusMessage: i18n.t('status.saving') });
 
     // 只保存 enabled 的路径到注册表
@@ -337,7 +344,7 @@ export const useAppStore = create<AppState>((set, get) => {
     const { maxSystemLength, maxUserLength, maxCombinedLength } = appConfig.path;
     if (!force && (sysJoined.length > maxSystemLength || userJoined.length > maxUserLength || (sysJoined + userJoined).length > maxCombinedLength)) {
       set({ isSaving: false, statusMessage: i18n.t('status.saveWarningLongPaths') });
-      return false;
+      return { kind: 'warning', reason: 'lengthExceeded' };
     }
 
     // 备份当前注册表（保存前备份旧值，失败仅警告不中断）
@@ -359,14 +366,24 @@ export const useAppStore = create<AppState>((set, get) => {
       set({ isModified: false, isSaving: false,
         statusMessage: backupFailed ? i18n.t('status.saved_without_backup') : i18n.t('status.saved'),
         _savedSys: savedSys, _savedUser: savedUser });
-      return true;
+      return { kind: 'success' };
     } else {
       const sysErr = (!sysOk && sysResult.status === 'rejected') ? String(sysResult.reason) : '';
       const usrErr = (!userOk && userResult.status === 'rejected') ? String(userResult.reason) : '';
       const parts = [sysErr, usrErr].filter(Boolean);
-      const msg = sysOk ? '用户 PATH 保存失败' : userOk ? '系统 PATH 保存失败' : `保存失败: ${parts.join('; ')}`;
-      set({ isSaving: false, statusMessage: msg });
-      return false;
+      
+      const msg = sysOk ? `用户 PATH 保存失败: ${usrErr}` : userOk ? `系统 PATH 保存失败: ${sysErr}` : `保存失败: ${parts.join('; ')}`;
+      
+      if (sysOk || userOk) {
+        // partial success
+        set({ isSaving: false });
+        await get().loadPaths(); // reload to avoid state drift
+        set({ statusMessage: msg }); // restore the error message overwritten by loadPaths
+        return { kind: 'partial', message: msg };
+      } else {
+        set({ isSaving: false, statusMessage: msg });
+        return { kind: 'failure', message: msg };
+      }
     }
   },