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/lib/article-list-actions.ts

@@ -1,42 +1,42 @@
-import type { ArticleDetail } from "@geo/shared-types";
+import type { ArticleDetail } from '@geo/shared-types'
 
 export interface ArticleActionState {
-  showPublish: boolean;
-  showEdit: boolean;
-  showPreview: boolean;
-  showCopy: boolean;
-  showDelete: boolean;
+  showPublish: boolean
+  showEdit: boolean
+  showPreview: boolean
+  showCopy: boolean
+  showDelete: boolean
 }
 
 export function resolveArticleActionState(generateStatus?: string | null): ArticleActionState {
-  if (generateStatus === "completed") {
+  if (generateStatus === 'completed') {
     return {
       showPublish: true,
       showEdit: true,
       showPreview: true,
       showCopy: true,
       showDelete: true,
-    };
+    }
   }
 
-  if (generateStatus === "draft") {
+  if (generateStatus === 'draft') {
     return {
       showPublish: false,
       showEdit: true,
       showPreview: false,
       showCopy: false,
       showDelete: true,
-    };
+    }
   }
 
-  if (generateStatus === "failed") {
+  if (generateStatus === 'failed') {
     return {
       showPublish: false,
       showEdit: false,
       showPreview: false,
       showCopy: false,
       showDelete: true,
-    };
+    }
   }
 
   return {
@@ -45,15 +45,14 @@ export function resolveArticleActionState(generateStatus?: string | null): Artic
     showPreview: true,
     showCopy: false,
     showDelete: true,
-  };
+  }
 }
 
-export function buildArticleClipboardContent(detail: Pick<ArticleDetail, "title" | "markdown_content">): string {
-  return [
-    detail.title ? `# ${detail.title}` : "",
-    detail.markdown_content ?? "",
-  ]
+export function buildArticleClipboardContent(
+  detail: Pick<ArticleDetail, 'title' | 'markdown_content'>,
+): string {
+  return [detail.title ? `# ${detail.title}` : '', detail.markdown_content ?? '']
     .filter(Boolean)
-    .join("\n\n")
-    .trim();
+    .join('\n\n')
+    .trim()
 }