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-complete.mjs

@@ -0,0 +1,75 @@
+#!/usr/bin/env node
+/**
+ * Canonical durable completion acknowledgement for Impeccable live sessions.
+ */
+
+import { createLiveSessionStore } from './live/session-store.mjs';
+import { readLiveServerInfo } from './lib/impeccable-paths.mjs';
+
+function parseArgs(argv) {
+  const out = { status: 'complete' };
+  for (let i = 0; i < argv.length; i++) {
+    const arg = argv[i];
+    if (arg === '--id') out.id = argv[++i];
+    else if (arg.startsWith('--id=')) out.id = arg.slice('--id='.length);
+    else if (arg === '--discarded' || arg === '--discard') out.status = 'discarded';
+    else if (arg === '--error') { out.status = 'agent_error'; out.message = argv[++i] || 'unknown error'; }
+    else if (arg.startsWith('--error=')) { out.status = 'agent_error'; out.message = arg.slice('--error='.length); }
+    else if (arg === '--help' || arg === '-h') out.help = true;
+  }
+  return out;
+}
+
+export async function completeCli() {
+  const args = parseArgs(process.argv.slice(2));
+  if (args.help || !args.id) {
+    console.log(`Usage: node live-complete.mjs --id SESSION_ID [--discarded|--error MESSAGE]\n\nAppend the final durable session acknowledgement. Use after accept/discard cleanup is verified.`);
+    process.exit(args.help ? 0 : 1);
+  }
+
+  const serverInfo = readServerInfo();
+  const serverResult = serverInfo ? await completeThroughServer(serverInfo, args) : null;
+  if (serverResult?.ok) {
+    const store = createLiveSessionStore({ cwd: process.cwd(), sessionId: args.id });
+    const snapshot = store.getSnapshot(args.id, { includeCompleted: true });
+    console.log(JSON.stringify({ ok: true, id: args.id, phase: snapshot?.phase || args.status, snapshot }, null, 2));
+    return;
+  }
+
+  const store = createLiveSessionStore({ cwd: process.cwd(), sessionId: args.id });
+  const event = args.status === 'discarded'
+    ? { type: 'discarded', id: args.id }
+    : args.status === 'agent_error'
+      ? { type: 'agent_error', id: args.id, message: args.message || 'unknown error' }
+      : { type: 'complete', id: args.id };
+  const snapshot = store.appendEvent(event);
+  console.log(JSON.stringify({ ok: true, id: args.id, phase: snapshot.phase, snapshot }, null, 2));
+}
+
+function readServerInfo() {
+  return readLiveServerInfo(process.cwd())?.info || null;
+}
+
+async function completeThroughServer(info, args) {
+  const type = args.status === 'discarded'
+    ? 'discarded'
+    : args.status === 'agent_error'
+      ? 'error'
+      : 'complete';
+  try {
+    const res = await fetch(`http://localhost:${info.port}/poll`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ token: info.token, id: args.id, type, message: args.message }),
+    });
+    if (!res.ok) return null;
+    return await res.json();
+  } catch {
+    return null;
+  }
+}
+
+const _running = process.argv[1];
+if (_running?.endsWith('live-complete.mjs') || _running?.endsWith('live-complete.mjs/')) {
+  completeCli();
+}