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/KnowledgeDetailDrawer.vue

@@ -1,82 +1,82 @@
 <script setup lang="ts">
-import { useQuery, useQueryClient } from "@tanstack/vue-query";
-import { computed, watch } from "vue";
+import { useQuery, useQueryClient } from '@tanstack/vue-query'
+import { computed, watch } from 'vue'
 
-import MarkdownPreview from "@/components/MarkdownPreview.vue";
-import { knowledgeApi } from "@/lib/api";
-import { formatDateTime } from "@/lib/display";
+import MarkdownPreview from '@/components/MarkdownPreview.vue'
+import { knowledgeApi } from '@/lib/api'
+import { formatDateTime } from '@/lib/display'
 
 const props = defineProps<{
-  open: boolean;
-  itemId: number | null;
-}>();
+  open: boolean
+  itemId: number | null
+}>()
 
 const emit = defineEmits<{
-  close: [];
-}>();
+  close: []
+}>()
 
-const queryClient = useQueryClient();
-const enabled = computed(() => props.open && Boolean(props.itemId));
+const queryClient = useQueryClient()
+const enabled = computed(() => props.open && Boolean(props.itemId))
 
 const detailQuery = useQuery({
-  queryKey: computed(() => ["knowledge", "detail", props.itemId]),
+  queryKey: computed(() => ['knowledge', 'detail', props.itemId]),
   enabled,
   queryFn: () => knowledgeApi.detail(props.itemId as number),
-});
+})
 
-const detail = computed(() => detailQuery.data.value);
-const hasMarkdown = computed(() => Boolean(detail.value?.markdown_content?.trim()));
-const isProcessing = computed(() =>
-  detail.value?.status === "pending" || detail.value?.status === "processing",
-);
-const isFailed = computed(() => detail.value?.status === "failed");
-const statusLabel = computed(() => formatKnowledgeStatus(detail.value?.status));
+const detail = computed(() => detailQuery.data.value)
+const hasMarkdown = computed(() => Boolean(detail.value?.markdown_content?.trim()))
+const isProcessing = computed(
+  () => detail.value?.status === 'pending' || detail.value?.status === 'processing',
+)
+const isFailed = computed(() => detail.value?.status === 'failed')
+const statusLabel = computed(() => formatKnowledgeStatus(detail.value?.status))
 const statusColor = computed(() => {
-  if (detail.value?.status === "completed") return "success";
-  if (detail.value?.status === "failed") return "error";
-  if (isProcessing.value) return "processing";
-  return "default";
-});
+  if (detail.value?.status === 'completed') return 'success'
+  if (detail.value?.status === 'failed') return 'error'
+  if (isProcessing.value) return 'processing'
+  return 'default'
+})
 
 watch(
   [() => props.open, () => props.itemId, () => detail.value?.status],
   ([open, itemId, status], _prev, onCleanup) => {
-    if (!open || !itemId || (status !== "pending" && status !== "processing")) {
-      return;
+    if (!open || !itemId || (status !== 'pending' && status !== 'processing')) {
+      return
     }
 
     const timer = window.setInterval(() => {
       void Promise.all([
         detailQuery.refetch(),
-        queryClient.invalidateQueries({ queryKey: ["knowledge", "items"] }),
-      ]);
-    }, 2500);
+        queryClient.invalidateQueries({ queryKey: ['knowledge', 'items'] }),
+      ])
+    }, 2500)
 
     onCleanup(() => {
-      window.clearInterval(timer);
-    });
+      window.clearInterval(timer)
+    })
   },
   { immediate: true },
-);
+)
 
 function handleClose(): void {
-  emit("close");
+  emit('close')
 }
 
 function formatKnowledgeStatus(status?: string): string {
   switch (status) {
-    case "completed":
-      return "学习完成";
-    case "processing":
-      return "处理中";
-    case "failed":
-      return "解析失败";
-    case "pending":
-      return "待处理";
-    case "deleted":
-      return "已删除";
+    case 'completed':
+      return '学习完成'
+    case 'processing':
+      return '处理中'
+    case 'failed':
+      return '解析失败'
+    case 'pending':
+      return '待处理'
+    case 'deleted':
+      return '已删除'
     default:
-      return status || "未知状态";
+      return status || '未知状态'
   }
 }
 </script>