feat(web): 重构前端UI并支持OpenAI协议

- 添加账号管理详情页（基本信息、提示词、CapCut、参考图标签页）
- 重构资产页面，按项目组分开展示图片/视频
- 聊天界面支持深度思考内容折叠展示、复制、删除消息
- 设置页面支持Agent配置（Anthropic/OpenAI协议）和工具配置
- 后端支持OpenAI兼容协议流式输出和DeepSeek思考模式
- 添加对话置顶/删除功能、数据库迁移、资产清单API
- 添加账号参考图上传/删除、技能配置持久化、连接测试API

web/server/routes/pipeline.ts

@@ -19,7 +19,7 @@ pipelineRouter.get('/conversations', (req, res) => {
     sql += ' WHERE title LIKE ?';
     params.push(`%${search}%`);
   }
-  sql += ' ORDER BY updated_at DESC LIMIT 100';
+  sql += ' ORDER BY pinned DESC, updated_at DESC LIMIT 100';
   const rows = getDb().prepare(sql).all(...params);
   res.json(rows);
 });
@@ -36,13 +36,19 @@ pipelineRouter.delete('/conversations/:id', (req, res) => {
   res.status(204).send();
 });
 
-// Rename conversation
+// Update conversation (rename / toggle pin)
 pipelineRouter.patch('/conversations/:id', (req, res) => {
-  const { title } = req.body;
-  if (!title) return res.status(400).json({ error: 'title required' });
-  getDb().prepare(
-    'UPDATE conversations SET title = ?, updated_at = datetime(\'now\') WHERE id = ?'
-  ).run(title, req.params.id);
+  const { title, pinned } = req.body;
+  if (title !== undefined) {
+    getDb().prepare(
+      'UPDATE conversations SET title = ?, updated_at = datetime(\'now\') WHERE id = ?'
+    ).run(title, req.params.id);
+  }
+  if (pinned !== undefined) {
+    getDb().prepare(
+      'UPDATE conversations SET pinned = ?, updated_at = datetime(\'now\') WHERE id = ?'
+    ).run(pinned ? 1 : 0, req.params.id);
+  }
   res.json({ ok: true });
 });