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/views/CustomGenerateView.vue

@@ -1,44 +1,40 @@
 <script setup lang="ts">
-import {
-  ThunderboltOutlined,
-  ClockCircleOutlined,
-} from "@ant-design/icons-vue";
-import { ref } from "vue";
-import { useI18n } from "vue-i18n";
+import { ClockCircleOutlined, ThunderboltOutlined } from '@ant-design/icons-vue'
+import { ref } from 'vue'
+import { useI18n } from 'vue-i18n'
 
-import CustomArticleTab from "@/components/CustomArticleTab.vue";
-import InstantTaskTab from "@/components/InstantTaskTab.vue";
-import PromptRuleTab from "@/components/PromptRuleTab.vue";
-import ScheduleTaskTab from "@/components/ScheduleTaskTab.vue";
-import InstantGenerateModal from "@/components/InstantGenerateModal.vue";
-import ScheduleTaskModal from "@/components/ScheduleTaskModal.vue";
+import CustomArticleTab from '@/components/CustomArticleTab.vue'
+import InstantGenerateModal from '@/components/InstantGenerateModal.vue'
+import InstantTaskTab from '@/components/InstantTaskTab.vue'
+import PromptRuleTab from '@/components/PromptRuleTab.vue'
+import ScheduleTaskModal from '@/components/ScheduleTaskModal.vue'
+import ScheduleTaskTab from '@/components/ScheduleTaskTab.vue'
 
-const { t } = useI18n();
+const { t } = useI18n()
 
-const activeTab = ref("articles");
-const instantModalOpen = ref(false);
-const scheduleModalOpen = ref(false);
+const activeTab = ref('articles')
+const instantModalOpen = ref(false)
+const scheduleModalOpen = ref(false)
 
 function openInstantModal(): void {
-  instantModalOpen.value = true;
+  instantModalOpen.value = true
 }
 
 function openScheduleModal(): void {
-  scheduleModalOpen.value = true;
+  scheduleModalOpen.value = true
 }
 </script>
 
 <template>
   <div class="custom-view">
-
     <section class="custom-view__cards">
       <div class="custom-view__card custom-view__card--instant" @click="openInstantModal">
         <div class="custom-view__card-icon custom-view__card-icon--instant">
           <ThunderboltOutlined />
         </div>
         <div>
-          <h4>{{ t("custom.cards.instantTitle") }}</h4>
-          <p>{{ t("custom.cards.instantDesc") }}</p>
+          <h4>{{ t('custom.cards.instantTitle') }}</h4>
+          <p>{{ t('custom.cards.instantDesc') }}</p>
         </div>
       </div>
       <div class="custom-view__card custom-view__card--schedule" @click="openScheduleModal">
@@ -46,8 +42,8 @@ function openScheduleModal(): void {
           <ClockCircleOutlined />
         </div>
         <div>
-          <h4>{{ t("custom.cards.scheduleTitle") }}</h4>
-          <p>{{ t("custom.cards.scheduleDesc") }}</p>
+          <h4>{{ t('custom.cards.scheduleTitle') }}</h4>
+          <p>{{ t('custom.cards.scheduleDesc') }}</p>
         </div>
       </div>
     </section>
@@ -96,7 +92,9 @@ function openScheduleModal(): void {
   border: 1px solid #e6edf5;
   border-radius: 12px;
   cursor: pointer;
-  transition: transform 0.2s, box-shadow 0.2s;
+  transition:
+    transform 0.2s,
+    box-shadow 0.2s;
 }
 
 .custom-view__card:hover {