feat: LLM intent router, direct chat execution, and Memory V2 light intervention

Wire chat intent routing with direct_chat on regular sessions, skill-selected
short-circuit to Agent, memory light/heavy intervention tiers, and fix direct
chat UI stuck streaming after completion.

Co-authored-by: Cursor <cursoragent@cursor.com>

admin-routes.mjs

@@ -30,6 +30,8 @@ function plazaRouteError(res, req, error) {
  * @param {Promise<unknown>} [deps.ready]  Optional bootstrap gate awaited before the first request resolves auth.
  * @param {object} deps.userAuth
  * @param {object|null} deps.llmProviderService
+ * @param {object|null} deps.memoryV2ConfigService
+ * @param {object|null} deps.adminSystemTestService
  * @param {object|null} deps.plazaPosts
  * @param {object|null} deps.plazaOps
  * @param {object|null} deps.wechatAdmin
@@ -40,6 +42,8 @@ export function createAdminApi({
   ready,
   userAuth,
   llmProviderService,
+  memoryV2ConfigService,
+  adminSystemTestService,
   plazaPosts,
   plazaOps,
   wechatAdmin,
@@ -87,6 +91,49 @@ export function createAdminApi({
     res.json({ summary: { ...summary, llm } });
   });
 
+  adminApi.get('/memory-v2/config', requireAdmin, async (_req, res) => {
+    if (!memoryV2ConfigService?.getAdminConfig) {
+      return res.status(503).json({ message: 'Memory V2 配置服务未启用' });
+    }
+    const result = await memoryV2ConfigService.getAdminConfig();
+    return res.json(result);
+  });
+
+  const updateMemoryV2Config = async (req, res) => {
+    if (!memoryV2ConfigService?.updateAdminConfig) {
+      return res.status(503).json({ message: 'Memory V2 配置服务未启用' });
+    }
+    const result = await memoryV2ConfigService.updateAdminConfig(req.body ?? {}, {
+      updatedBy: req.currentUser.id,
+    });
+    return res.json(result);
+  };
+
+  adminApi.put('/memory-v2/config', requireAdmin, updateMemoryV2Config);
+  adminApi.patch('/memory-v2/config', requireAdmin, updateMemoryV2Config);
+
+  adminApi.get('/memory-v2/runtime', requireAdmin, async (_req, res) => {
+    if (!memoryV2ConfigService?.getRuntimeState) {
+      return res.status(503).json({ message: 'Memory V2 配置服务未启用' });
+    }
+    const result = await memoryV2ConfigService.getRuntimeState();
+    return res.json(result);
+  });
+
+  adminApi.post('/system-tests/skill-validation', requireAdmin, async (req, res) => {
+    if (!adminSystemTestService?.runSkillValidation) {
+      return res.status(503).json({ message: '系统测试服务未启用' });
+    }
+    const username = String(req.body?.username ?? '').trim();
+    const password = String(req.body?.password ?? '');
+    const skillName = String(req.body?.skillName ?? 'service-integration-smoke').trim();
+    if (!username || !password) {
+      return res.status(400).json({ message: '请输入测试账号和密码' });
+    }
+    const result = await adminSystemTestService.runSkillValidation({ username, password, skillName });
+    return res.json(result);
+  });
+
   adminApi.post('/users', requireAdmin, async (req, res) => {
     const result = await userAuth.createUser(req.body ?? {});
     if (!result.ok) return res.status(400).json({ message: result.message });