feat(MCN工作台): 数据功能页+图标扁平化+多项UI优化

- 工作台大版本升级：hash 路由 + 6 数据功能页（周榜/热门账号/账号详情/视频详情/AI写脚本/AI写作复盘），只读复用 dsh 库副本 + 抖音榜单 JSON
- 数据库隔离：复制 dsh 库到 mcn-work-shop/，与 dsh 原库各访问各的（已 gitignore）
- 图标全面扁平化：Lucide 线性 SVG，功能图标亮色区分，文字标题去图标
- 首页重构：功能入口卡 + AI写剧本快捷卡片(2列/8个/5行预览) + 独立帮助页 + header 精简
- 新增设计技能 impeccable + taste-skill（生成网页时参考）
- 修复：fmtTime 跨 script 全局冲突(P0)、弹窗关闭、外链新标签打开等

.workbuddy/skills/impeccable/scripts/live/browser-script-parts.mjs

@@ -0,0 +1,50 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
+export const LIVE_BROWSER_SCRIPT_PARTS = Object.freeze([
+  Object.freeze({ name: 'session-state', file: 'live-browser-session.js' }),
+  Object.freeze({ name: 'dom-helpers', file: 'live-browser-dom.js' }),
+  Object.freeze({ name: 'browser-ui', file: 'live-browser.js' }),
+]);
+
+export function resolveLiveBrowserScriptParts(scriptsDir, parts = LIVE_BROWSER_SCRIPT_PARTS) {
+  if (!scriptsDir) throw new Error('scriptsDir is required');
+  return parts.map((part, index) => ({
+    ...part,
+    index,
+    path: path.join(scriptsDir, part.file),
+  }));
+}
+
+export function assertLiveBrowserScriptParts(parts, exists = fs.existsSync) {
+  for (const part of parts) {
+    if (!exists(part.path)) {
+      throw new Error(`Live browser script part missing: ${part.name} (${part.path})`);
+    }
+  }
+  return parts;
+}
+
+export function readLiveBrowserScriptParts(parts, readFile = (filePath) => fs.readFileSync(filePath, 'utf-8')) {
+  return parts.map((part) => ({
+    ...part,
+    source: readFile(part.path),
+  }));
+}
+
+export function assembleLiveBrowserScript({ token, port, vocabulary, commandPrefix = '/', parts }) {
+  const prelude =
+    `window.__IMPECCABLE_TOKEN__ = '${token}';\n` +
+    `window.__IMPECCABLE_PORT__ = ${port};\n` +
+    `window.__IMPECCABLE_COMMAND_PREFIX__ = ${JSON.stringify(commandPrefix)};\n` +
+    // Canonical command vocabulary (values + labels + icons). live-browser.js
+    // builds its action picker from this instead of an inline copy.
+    `window.__IMPECCABLE_VOCAB__ = ${JSON.stringify(vocabulary)};\n`;
+
+  const body = parts.map((part) => {
+    const file = part.file || path.basename(part.path || '');
+    return `// --- impeccable live script part: ${part.name} (${file}) ---\n${part.source}`;
+  }).join('\n');
+
+  return prelude + body;
+}