feat(settings): add autoSaveSettings for lightweight auto-save

Add optimized auto-save function for General tab settings.
- Add autoSaveSettings method for non-destructive auto-save
- Only trigger system APIs when values actually change
- Avoid unnecessary auto-launch and plugin config updates
- Update tests to cover new functionality

src/hooks/useSettings.ts

@@ -37,6 +37,9 @@ export interface UseSettingsResult {
     overrides?: Partial<SettingsFormState>,
     options?: { silent?: boolean },
   ) => Promise<SaveResult | null>;
+  autoSaveSettings: (
+    updates: Partial<SettingsFormState>,
+  ) => Promise<SaveResult | null>;
   resetSettings: () => void;
   acknowledgeRestart: () => void;
 }
@@ -117,7 +120,82 @@ export function useSettings(): UseSettingsResult {
     setRequiresRestart,
   ]);
 
-  // 保存设置
+  // 即时保存设置（用于 General 标签页的实时更新）
+  // 保存基础配置 + 独立的系统 API 调用（开机自启）
+  const autoSaveSettings = useCallback(
+    async (updates: Partial<SettingsFormState>): Promise<SaveResult | null> => {
+      const mergedSettings = settings ? { ...settings, ...updates } : null;
+      if (!mergedSettings) return null;
+
+      try {
+        const sanitizedClaudeDir = sanitizeDir(mergedSettings.claudeConfigDir);
+        const sanitizedCodexDir = sanitizeDir(mergedSettings.codexConfigDir);
+        const sanitizedGeminiDir = sanitizeDir(mergedSettings.geminiConfigDir);
+
+        const payload: Settings = {
+          ...mergedSettings,
+          claudeConfigDir: sanitizedClaudeDir,
+          codexConfigDir: sanitizedCodexDir,
+          geminiConfigDir: sanitizedGeminiDir,
+          language: mergedSettings.language,
+        };
+
+        // 保存到配置文件
+        await saveMutation.mutateAsync(payload);
+
+        // 如果开机自启状态改变，调用系统 API
+        if (
+          payload.launchOnStartup !== undefined &&
+          payload.launchOnStartup !== data?.launchOnStartup
+        ) {
+          try {
+            await settingsApi.setAutoLaunch(payload.launchOnStartup);
+          } catch (error) {
+            console.error("Failed to update auto-launch:", error);
+            toast.error(
+              t("settings.autoLaunchFailed", {
+                defaultValue: "设置开机自启失败",
+              }),
+            );
+          }
+        }
+
+        // 持久化语言偏好
+        try {
+          if (typeof window !== "undefined" && updates.language) {
+            window.localStorage.setItem("language", updates.language);
+          }
+        } catch (error) {
+          console.warn(
+            "[useSettings] Failed to persist language preference",
+            error,
+          );
+        }
+
+        // 更新托盘菜单
+        try {
+          await providersApi.updateTrayMenu();
+        } catch (error) {
+          console.warn("[useSettings] Failed to refresh tray menu", error);
+        }
+
+        return { requiresRestart: false };
+      } catch (error) {
+        console.error("[useSettings] Failed to auto-save settings", error);
+        toast.error(
+          t("notifications.settingsSaveFailed", {
+            defaultValue: "保存设置失败: {{error}}",
+            error: (error as Error)?.message ?? String(error),
+          }),
+        );
+        throw error;
+      }
+    },
+    [data, saveMutation, settings, t],
+  );
+
+  // 完整保存设置（用于 Advanced 标签页的手动保存）
+  // 包含所有系统 API 调用和完整的验证流程
   const saveSettings = useCallback(
     async (
       overrides?: Partial<SettingsFormState>,
@@ -147,8 +225,11 @@ export function useSettings(): UseSettingsResult {
 
         await settingsApi.setAppConfigDirOverride(sanitizedAppDir ?? null);
 
-        // 如果开机自启状态改变，调用系统 API
-        if (payload.launchOnStartup !== undefined) {
+        // 只在开机自启状态真正改变时调用系统 API
+        if (
+          payload.launchOnStartup !== undefined &&
+          payload.launchOnStartup !== data?.launchOnStartup
+        ) {
           try {
             await settingsApi.setAutoLaunch(payload.launchOnStartup);
           } catch (error) {
@@ -161,22 +242,29 @@ export function useSettings(): UseSettingsResult {
           }
         }
 
-        try {
-          if (payload.enableClaudePluginIntegration) {
-            await settingsApi.applyClaudePluginConfig({ official: false });
-          } else {
-            await settingsApi.applyClaudePluginConfig({ official: true });
+        // 只在 Claude 插件集成状态真正改变时调用系统 API
+        if (
+          payload.enableClaudePluginIntegration !== undefined &&
+          payload.enableClaudePluginIntegration !==
+            data?.enableClaudePluginIntegration
+        ) {
+          try {
+            if (payload.enableClaudePluginIntegration) {
+              await settingsApi.applyClaudePluginConfig({ official: false });
+            } else {
+              await settingsApi.applyClaudePluginConfig({ official: true });
+            }
+          } catch (error) {
+            console.warn(
+              "[useSettings] Failed to sync Claude plugin config",
+              error,
+            );
+            toast.error(
+              t("notifications.syncClaudePluginFailed", {
+                defaultValue: "同步 Claude 插件失败",
+              }),
+            );
           }
-        } catch (error) {
-          console.warn(
-            "[useSettings] Failed to sync Claude plugin config",
-            error,
-          );
-          toast.error(
-            t("notifications.syncClaudePluginFailed", {
-              defaultValue: "同步 Claude 插件失败",
-            }),
-          );
         }
 
         try {
@@ -268,6 +356,7 @@ export function useSettings(): UseSettingsResult {
     resetDirectory,
     resetAppConfigDir,
     saveSettings,
+    autoSaveSettings,
     resetSettings,
     acknowledgeRestart,
   };