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/desktop-client/src/main/playwright-cdp-targets.test.ts

@@ -1,32 +1,38 @@
-import { describe, expect, it } from "vitest";
+import { describe, expect, it } from 'vitest'
 
-import { isReclaimableHiddenPlaywrightTarget } from "./playwright-cdp-targets";
+import { isReclaimableHiddenPlaywrightTarget } from './playwright-cdp-targets'
 
-describe("playwright cdp target pruning", () => {
-  it("does not reclaim blank app-owned page targets", () => {
-    expect(isReclaimableHiddenPlaywrightTarget({
-      id: "main-window-host",
-      type: "page",
-      title: "",
-      url: "",
-    })).toBe(false);
-  });
+describe('playwright cdp target pruning', () => {
+  it('does not reclaim blank app-owned page targets', () => {
+    expect(
+      isReclaimableHiddenPlaywrightTarget({
+        id: 'main-window-host',
+        type: 'page',
+        title: '',
+        url: '',
+      }),
+    ).toBe(false)
+  })
 
-  it("only reclaims targets marked as hidden Playwright pages", () => {
-    expect(isReclaimableHiddenPlaywrightTarget({
-      id: "hidden-window",
-      type: "page",
-      title: "监控任务 · hidden-playwright",
-      url: "data:text/html;charset=utf-8,%3Cmeta%20name%3D%22geo-hidden-playwright-token%22%3E",
-    })).toBe(true);
-  });
+  it('only reclaims targets marked as hidden Playwright pages', () => {
+    expect(
+      isReclaimableHiddenPlaywrightTarget({
+        id: 'hidden-window',
+        type: 'page',
+        title: '监控任务 · hidden-playwright',
+        url: 'data:text/html;charset=utf-8,%3Cmeta%20name%3D%22geo-hidden-playwright-token%22%3E',
+      }),
+    ).toBe(true)
+  })
 
-  it("ignores regular user-visible browser targets", () => {
-    expect(isReclaimableHiddenPlaywrightTarget({
-      id: "renderer",
-      type: "page",
-      title: "省心推 - 账号健康监控与内容发布平台",
-      url: "http://localhost:5173/",
-    })).toBe(false);
-  });
-});
+  it('ignores regular user-visible browser targets', () => {
+    expect(
+      isReclaimableHiddenPlaywrightTarget({
+        id: 'renderer',
+        type: 'page',
+        title: '省心推 - 账号健康监控与内容发布平台',
+        url: 'http://localhost:5173/',
+      }),
+    ).toBe(false)
+  })
+})