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/desktop-client/src/renderer/routes.ts

@@ -1,33 +1,33 @@
-import { createRouter, createWebHashHistory, type RouteRecordRaw } from "vue-router";
+import { createRouter, createWebHashHistory, type RouteRecordRaw } from 'vue-router'
 
 const routes: RouteRecordRaw[] = [
   {
-    path: "/",
-    name: "home",
-    component: () => import("./views/HomeView.vue"),
+    path: '/',
+    name: 'home',
+    component: () => import('./views/HomeView.vue'),
   },
   {
-    path: "/publish-management",
-    name: "publish-management",
-    component: () => import("./views/PublishManagementView.vue"),
+    path: '/publish-management',
+    name: 'publish-management',
+    component: () => import('./views/PublishManagementView.vue'),
   },
-  { path: "/tasks", redirect: "/publish-management" },
+  { path: '/tasks', redirect: '/publish-management' },
   {
-    path: "/media-platforms",
-    name: "media-platforms",
-    component: () => import("./views/AccountsView.vue"),
+    path: '/media-platforms',
+    name: 'media-platforms',
+    component: () => import('./views/AccountsView.vue'),
   },
   {
-    path: "/ai-platforms",
-    name: "ai-platforms",
-    component: () => import("./views/AiPlatformsView.vue"),
+    path: '/ai-platforms',
+    name: 'ai-platforms',
+    component: () => import('./views/AiPlatformsView.vue'),
   },
-  { path: "/accounts", redirect: "/media-platforms" },
-  { path: "/settings", redirect: "/" },
-  { path: "/diagnostics", redirect: "/" },
-];
+  { path: '/accounts', redirect: '/media-platforms' },
+  { path: '/settings', redirect: '/' },
+  { path: '/diagnostics', redirect: '/' },
+]
 
 export const router = createRouter({
   history: createWebHashHistory(),
   routes,
-});
+})