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/ArticleGenerateStatus.vue

@@ -1,15 +1,17 @@
 <script setup lang="ts">
-import { LoadingOutlined } from "@ant-design/icons-vue";
-import { computed } from "vue";
+import { LoadingOutlined } from '@ant-design/icons-vue'
+import { computed } from 'vue'
 
-import { getGenerateStatusMeta } from "@/lib/display";
+import { getGenerateStatusMeta } from '@/lib/display'
 
 const props = defineProps<{
-  status?: string | null;
-}>();
+  status?: string | null
+}>()
 
-const statusMeta = computed(() => getGenerateStatusMeta(props.status));
-const isLoading = computed(() => props.status === "queued" || props.status === "generating" || props.status === "running");
+const statusMeta = computed(() => getGenerateStatusMeta(props.status))
+const isLoading = computed(
+  () => props.status === 'queued' || props.status === 'generating' || props.status === 'running',
+)
 </script>
 
 <template>