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/App.vue

@@ -1,70 +1,73 @@
 <script setup lang="ts">
-import { computed, defineAsyncComponent, onMounted, watch } from "vue";
-import { useDesktopSession } from "./composables/useDesktopSession";
-import LoginView from "./views/LoginView.vue";
+import { computed, defineAsyncComponent, onMounted, watch } from 'vue'
+import { useDesktopSession } from './composables/useDesktopSession'
+import LoginView from './views/LoginView.vue'
 
-const DesktopShell = defineAsyncComponent(() => import("./components/DesktopShell.vue"));
-const SettingsWindow = defineAsyncComponent(() => import("./views/SettingsWindow.vue"));
+const DesktopShell = defineAsyncComponent(() => import('./components/DesktopShell.vue'))
+const SettingsWindow = defineAsyncComponent(() => import('./views/SettingsWindow.vue'))
 
-const { isAuthenticated, syncRuntimeSession } = useDesktopSession();
-type RendererWindowMode = "auto" | "login" | "main" | "settings";
+const { isAuthenticated, syncRuntimeSession } = useDesktopSession()
+type RendererWindowMode = 'auto' | 'login' | 'main' | 'settings'
 
 interface WindowModeBridge {
   setWindowMode?: (
-    mode: "login" | "main",
-    request?: { source?: "auth-state" | "login" | "logout"; animate?: boolean },
-  ) => Promise<unknown>;
+    mode: 'login' | 'main',
+    request?: { source?: 'auth-state' | 'login' | 'logout'; animate?: boolean },
+  ) => Promise<unknown>
 }
 
 function resolveRendererWindowMode(): RendererWindowMode {
-  const mode = new URLSearchParams(window.location.search).get("window");
-  return mode === "login" || mode === "main" || mode === "settings" ? mode : "auto";
+  const mode = new URLSearchParams(window.location.search).get('window')
+  return mode === 'login' || mode === 'main' || mode === 'settings' ? mode : 'auto'
 }
 
 function getModeBridge(): WindowModeBridge | undefined {
-  return (globalThis as unknown as {
-    desktopBridge?: { app?: WindowModeBridge };
-  }).desktopBridge?.app;
+  return (
+    globalThis as unknown as {
+      desktopBridge?: { app?: WindowModeBridge }
+    }
+  ).desktopBridge?.app
 }
 
 function syncWindowMode(authenticated: boolean): void {
-  void getModeBridge()?.setWindowMode?.(authenticated ? "main" : "login", { source: "auth-state" });
+  void getModeBridge()?.setWindowMode?.(authenticated ? 'main' : 'login', { source: 'auth-state' })
 }
 
-const rendererWindowMode = resolveRendererWindowMode();
-document.documentElement.dataset.windowMode = rendererWindowMode;
-document.documentElement.dataset.platform =
-  navigator.platform.toLowerCase().includes("mac") ? "darwin" : "win32";
-const usesAutomaticWindowMode = rendererWindowMode === "auto";
-const showsSettingsSurface = rendererWindowMode === "settings";
-const showsMainSurface = computed(() =>
-  rendererWindowMode === "main" || (rendererWindowMode === "auto" && isAuthenticated.value),
-);
+const rendererWindowMode = resolveRendererWindowMode()
+document.documentElement.dataset.windowMode = rendererWindowMode
+document.documentElement.dataset.platform = navigator.platform.toLowerCase().includes('mac')
+  ? 'darwin'
+  : 'win32'
+const usesAutomaticWindowMode = rendererWindowMode === 'auto'
+const showsSettingsSurface = rendererWindowMode === 'settings'
+const showsMainSurface = computed(
+  () => rendererWindowMode === 'main' || (rendererWindowMode === 'auto' && isAuthenticated.value),
+)
 
 if (usesAutomaticWindowMode) {
-  syncWindowMode(isAuthenticated.value);
-  watch(isAuthenticated, (next) => syncWindowMode(next));
+  syncWindowMode(isAuthenticated.value)
+  watch(isAuthenticated, (next) => syncWindowMode(next))
 }
 
-if (rendererWindowMode === "main") {
+if (rendererWindowMode === 'main') {
   if (!isAuthenticated.value) {
-    syncWindowMode(false);
+    syncWindowMode(false)
   }
   watch(isAuthenticated, (next) => {
     if (!next) {
-      syncWindowMode(false);
+      syncWindowMode(false)
     }
-  });
+  })
 }
 
 onMounted(() => {
-  if (rendererWindowMode !== "login") {
-    void syncRuntimeSession();
+  if (rendererWindowMode !== 'login') {
+    void syncRuntimeSession()
   }
   if (usesAutomaticWindowMode) {
-    syncWindowMode(isAuthenticated.value);
+    syncWindowMode(isAuthenticated.value)
   }
-});
+})
 </script>
 
 <template>
@@ -81,5 +84,4 @@ body,
   height: 100%;
   overflow: hidden;
 }
-
 </style>