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/admin-web/src/components/ArticleSourceMeta.vue

@@ -7,70 +7,68 @@ import {
   EditOutlined,
   TeamOutlined,
   ThunderboltOutlined,
-} from "@ant-design/icons-vue";
-import { computed, type Component } from "vue";
+} from '@ant-design/icons-vue'
+import { computed, type Component } from 'vue'
 
-import { formatDateTime, getSourceTypeLabel } from "@/lib/display";
+import { formatDateTime, getSourceTypeLabel } from '@/lib/display'
 
 const props = defineProps<{
-  sourceType?: string | null;
-  generationMode?: string | null;
-  createdAt?: string | null;
-}>();
+  sourceType?: string | null
+  generationMode?: string | null
+  createdAt?: string | null
+}>()
 
-const sourceLabel = computed(() =>
-  getSourceTypeLabel(props.sourceType, props.generationMode),
-);
+const sourceLabel = computed(() => getSourceTypeLabel(props.sourceType, props.generationMode))
 
-const createdAtLabel = computed(() => formatDateTime(props.createdAt));
+const createdAtLabel = computed(() => formatDateTime(props.createdAt))
 
 const sourceVariant = computed<
-  "template" | "custom" | "instant" | "schedule" | "free-create" | "imitation" | "kol" | "default"
+  'template' | 'custom' | 'instant' | 'schedule' | 'free-create' | 'imitation' | 'kol' | 'default'
 >(() => {
-  if (props.sourceType === "template") {
-    return "template";
+  if (props.sourceType === 'template') {
+    return 'template'
   }
-  if (props.sourceType === "free_create") {
-    return "free-create";
+  if (props.sourceType === 'free_create') {
+    return 'free-create'
   }
-  if (props.sourceType === "imitation") {
-    return "imitation";
+  if (props.sourceType === 'imitation') {
+    return 'imitation'
   }
-  if (props.sourceType === "kol") {
-    return "kol";
+  if (props.sourceType === 'kol') {
+    return 'kol'
   }
-  if (props.sourceType === "custom_generation") {
-    if (props.generationMode === "schedule") {
-      return "schedule";
+  if (props.sourceType === 'custom_generation') {
+    if (props.generationMode === 'schedule') {
+      return 'schedule'
     }
-    if (props.generationMode === "instant") {
-      return "instant";
+    if (props.generationMode === 'instant') {
+      return 'instant'
     }
-    return "custom";
+    return 'custom'
   }
-  return "default";
-});
+  return 'default'
+})
 
 const badgeIcon = computed<Component>(() => {
   switch (sourceVariant.value) {
-    case "template":
-      return AppstoreOutlined;
-    case "instant":
-      return ThunderboltOutlined;
-    case "schedule":
-      return CalendarOutlined;
-    case "custom":
-      return ThunderboltOutlined;
-    case "free-create":
-      return EditOutlined;
-    case "imitation":
-      return CopyOutlined;
-    case "kol":
-      return TeamOutlined;
+    case 'template':
+      return AppstoreOutlined
+    case 'instant':
+      return ThunderboltOutlined
+    case 'schedule':
+      return CalendarOutlined
+    case 'custom':
+      return ThunderboltOutlined
+    case 'free-create':
+      return EditOutlined
+    case 'imitation':
+      return CopyOutlined
+    case 'kol':
+      return TeamOutlined
     default:
-      return AppstoreOutlined;
+      return AppstoreOutlined
   }
-});
+})
 </script>
 
 <template>