chore(frontend): introduce prettier + eslint and prune unused code

- Add Prettier 3 with prettier-plugin-organize-imports (sorts/removes unused imports)
- Add ESLint 10 flat config with typescript-eslint + eslint-plugin-vue + eslint-config-prettier
- Add root scripts: format, format:check, lint, lint:fix
- Reformat 257 files across admin-web, ops-web, desktop-client, packages
- Remove unused locals/exports flagged by --noUnusedLocals/--noUnusedParameters
- Fix duplicate localTabLabel key, surrogate-pair regex u-flag, NBSP literal in regex
- Skip server/ (Go) and apps/browser-extension/ (deprecated per ADR)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/ops-web/src/layouts/AppShell.vue

@@ -19,15 +19,15 @@
     <a-layout>
       <a-layout-header class="ops-header">
         <a-button type="text" class="header-trigger" @click="collapsed = !collapsed">
-          {{ collapsed ? "›" : "‹" }}
+          {{ collapsed ? '›' : '‹' }}
         </a-button>
         <span style="flex: 1" />
         <a-dropdown placement="bottomRight">
-          <div class="user-dropdown-btn" style="cursor: pointer;">
+          <div class="user-dropdown-btn" style="cursor: pointer">
             <div class="user-avatar">
-              {{ auth.operator?.display_name?.charAt(0) ?? "U" }}
+              {{ auth.operator?.display_name?.charAt(0) ?? 'U' }}
             </div>
-            <span>{{ auth.operator?.display_name ?? "未登录" }}</span>
+            <span>{{ auth.operator?.display_name ?? '未登录' }}</span>
           </div>
           <template #overlay>
             <a-menu @click="onUserMenuClick">
@@ -53,95 +53,95 @@ import {
   SafetyCertificateOutlined,
   SettingOutlined,
   TeamOutlined,
-} from "@ant-design/icons-vue";
-import type { ItemType } from "ant-design-vue";
-import { computed, h, onMounted, ref } from "vue";
-import { useRoute, useRouter } from "vue-router";
+} from '@ant-design/icons-vue'
+import type { ItemType } from 'ant-design-vue'
+import { computed, h, onMounted, ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
 
-import { useAuthStore } from "@/stores/auth";
+import { useAuthStore } from '@/stores/auth'
 
 interface MenuLeaf {
-  key: string;
-  label: string;
-  path: string;
+  key: string
+  label: string
+  path: string
 }
 
-const router = useRouter();
-const route = useRoute();
-const auth = useAuthStore();
+const router = useRouter()
+const route = useRoute()
+const auth = useAuthStore()
 
-const collapsed = ref(false);
+const collapsed = ref(false)
 
 const menuLeaves: MenuLeaf[] = [
-  { key: "/admin-users", label: "用户管理", path: "/admin-users" },
-  { key: "/kol-subscriptions", label: "订阅包审批", path: "/kol-subscriptions" },
-  { key: "/site-domain-mappings", label: "站点映射", path: "/site-domain-mappings" },
-  { key: "/accounts", label: "操作员管理", path: "/accounts" },
-  { key: "/audits", label: "审计日志", path: "/audits" },
-];
+  { key: '/admin-users', label: '用户管理', path: '/admin-users' },
+  { key: '/kol-subscriptions', label: '订阅包审批', path: '/kol-subscriptions' },
+  { key: '/site-domain-mappings', label: '站点映射', path: '/site-domain-mappings' },
+  { key: '/accounts', label: '操作员管理', path: '/accounts' },
+  { key: '/audits', label: '审计日志', path: '/audits' },
+]
 
 const menuItems = computed<ItemType[]>(() => [
   {
-    key: "/admin-users",
-    label: "用户管理",
+    key: '/admin-users',
+    label: '用户管理',
     icon: () => h(TeamOutlined),
   },
   {
-    key: "/kol-subscriptions",
-    label: "订阅包审批",
+    key: '/kol-subscriptions',
+    label: '订阅包审批',
     icon: () => h(CrownOutlined),
   },
   {
-    key: "/site-domain-mappings",
-    label: "站点映射",
+    key: '/site-domain-mappings',
+    label: '站点映射',
     icon: () => h(GlobalOutlined),
   },
   {
-    key: "system",
-    label: "系统设置",
+    key: 'system',
+    label: '系统设置',
     icon: () => h(SettingOutlined),
     children: [
       {
-        key: "/accounts",
-        label: "操作员管理",
+        key: '/accounts',
+        label: '操作员管理',
         icon: () => h(SafetyCertificateOutlined),
       },
       {
-        key: "/audits",
-        label: "审计日志",
+        key: '/audits',
+        label: '审计日志',
         icon: () => h(AuditOutlined),
       },
     ],
   },
-]);
+])
 
-const openKeys = ref<string[]>(["system"]);
+const openKeys = ref<string[]>(['system'])
 
 function onOpenKeysChange(keys: string[]) {
-  openKeys.value = keys;
+  openKeys.value = keys
 }
 
-const selectedKeys = computed(() => [route.path]);
+const selectedKeys = computed(() => [route.path])
 
 function onMenuClick(info: { key: string | number }) {
-  const item = menuLeaves.find((m) => m.key === info.key);
-  if (item) void router.push(item.path);
+  const item = menuLeaves.find((m) => m.key === info.key)
+  if (item) void router.push(item.path)
 }
 
 function onUserMenuClick(info: { key: string | number }) {
-  if (info.key === "logout") {
-    auth.logout();
-    void router.replace({ name: "login" });
-  } else if (info.key === "profile") {
-    void router.push({ name: "profile" });
+  if (info.key === 'logout') {
+    auth.logout()
+    void router.replace({ name: 'login' })
+  } else if (info.key === 'profile') {
+    void router.push({ name: 'profile' })
   }
 }
 
 onMounted(() => {
   if (auth.isAuthenticated) {
-    void auth.refreshSelf();
+    void auth.refreshSelf()
   }
-});
+})
 </script>
 
 <style scoped>