feat: 添加 vue-sonner，优化反馈

app/stores/answer.ts

@@ -1,5 +1,6 @@
 // app/stores/answer.ts - 答题页和 Dashboard 的统一状态管理
 import { defineStore } from "pinia";
+import { toast } from "vue-sonner";
 
 import type {
   IHealthResponse,
@@ -133,8 +134,10 @@ export const useAnswerStore = defineStore("answer", () => {
       }
 
       searchErrorMessage.value = res.data.msg || "答题失败";
+      toast.error(searchErrorMessage.value);
     } catch (error) {
       searchErrorMessage.value = getClientErrorMessage(error, "服务器内部错误");
+      toast.error(searchErrorMessage.value);
     } finally {
       searchLoading.value = false;
     }
@@ -150,6 +153,7 @@ export const useAnswerStore = defineStore("answer", () => {
         error,
         "健康检查失败"
       );
+      toast.error(dashboardErrorMessage.value);
     }
   };
 
@@ -164,6 +168,7 @@ export const useAnswerStore = defineStore("answer", () => {
         error,
         "统计信息读取失败"
       );
+      toast.error(dashboardErrorMessage.value);
     } finally {
       statsLoading.value = false;
     }
@@ -186,6 +191,7 @@ export const useAnswerStore = defineStore("answer", () => {
         error,
         "问答记录读取失败"
       );
+      toast.error(dashboardErrorMessage.value);
     } finally {
       recordsLoading.value = false;
     }
@@ -204,12 +210,14 @@ export const useAnswerStore = defineStore("answer", () => {
 
     try {
       await AnswerService.clearCache();
+      toast.success("缓存已清空");
       await Promise.allSettled([getStats(), getRecords(1)]);
     } catch (error) {
       dashboardErrorMessage.value = getClientErrorMessage(
         error,
         "缓存清理失败"
       );
+      toast.error(dashboardErrorMessage.value);
     } finally {
       cacheClearing.value = false;
     }

app/stores/auth.ts

@@ -1,5 +1,6 @@
 // app/stores/auth.ts - 用户登录状态管理
 import { defineStore } from "pinia";
+import { toast } from "vue-sonner";
 
 import { authClient } from "@/utils/auth";
 
@@ -79,6 +80,7 @@ export const useAuthStore = defineStore("auth", () => {
       const result = await authClient.signIn.email({ email, password });
       if (result.error) {
         error.value = "邮箱或密码错误";
+        toast.error(error.value);
         return false;
       }
       // 直接使用登录响应中的用户数据，无需重复请求 get-session
@@ -87,9 +89,11 @@ export const useAuthStore = defineStore("auth", () => {
           result.data.user as Parameters<typeof _setUserFromResult>[0]
         );
       }
+      toast.success("登录成功");
       return true;
     } catch {
       error.value = "登录失败，请重试";
+      toast.error(error.value);
       return false;
     } finally {
       loading.value = false;
@@ -104,6 +108,7 @@ export const useAuthStore = defineStore("auth", () => {
       const result = await authClient.signUp.email({ name, email, password });
       if (result.error) {
         error.value = "注册失败，邮箱可能已被使用";
+        toast.error(error.value);
         return false;
       }
       if (result.data?.user) {
@@ -111,9 +116,11 @@ export const useAuthStore = defineStore("auth", () => {
           result.data.user as Parameters<typeof _setUserFromResult>[0]
         );
       }
+      toast.success("注册成功");
       return true;
     } catch {
       error.value = "注册失败，请重试";
+      toast.error(error.value);
       return false;
     } finally {
       loading.value = false;
@@ -125,6 +132,7 @@ export const useAuthStore = defineStore("auth", () => {
     await authClient.signOut();
     user.value = null;
     initialized.value = false;
+    toast.success("已退出登录");
   };
 
   /** 刷新当前用户的 apiToken；成功后同步更新 store */
@@ -139,12 +147,15 @@ export const useAuthStore = defineStore("auth", () => {
       }>("/api/user/refresh-token", { method: "POST" });
       if (res.code === 0 && res.data?.apiToken && user.value) {
         user.value = { ...user.value, apiToken: res.data.apiToken };
+        toast.success("Token 已刷新");
         return true;
       }
       error.value = res.msg || "刷新失败";
+      toast.error(error.value);
       return false;
     } catch {
       error.value = "刷新失败，请重试";
+      toast.error(error.value);
       return false;
     } finally {
       loading.value = false;

app/stores/global.ts

@@ -0,0 +1,20 @@
+// app/stores/global.ts - 全局通用状态（主题等），持久化由 @nuxtjs/color-mode 统一管理（localStorage/cookie）
+export const useGlobalStore = defineStore("theme", () => {
+  // useColorMode 会自动读写持久化存储，class 也由其挂到 <html>
+  const colorMode = useColorMode();
+
+  /** 当前是否深色模式 */
+  const isDark = computed(() => colorMode.value === "dark");
+
+  /** 切换深色 / 浅色 */
+  const toggle = () => {
+    colorMode.value = isDark.value ? "light" : "dark";
+  };
+
+  /** vue-sonner Toaster 的 theme prop 值，跟随当前模式 */
+  const toasterTheme = computed<"light" | "dark">(() =>
+    isDark.value ? "dark" : "light"
+  );
+
+  return { isDark, toggle, toasterTheme };
+});