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-bootstrap.mjs

@@ -16,6 +16,7 @@ import { createSubscriptionService } from './billing-subscription.mjs';
 import { createDbPool, isDatabaseConfigured } from './db.mjs';
 import { createUserAuth } from './user-auth.mjs';
 import { createLlmProviderService } from './llm-providers.mjs';
+import { createMemoryV2AdminConfigService } from './memory-v2-admin-config.mjs';
 import { createPlazaPostService, formatPostRow } from './plaza-posts.mjs';
 import { createPlazaInteractionService } from './plaza-interactions.mjs';
 import { createPlazaOpsService } from './plaza-ops.mjs';
@@ -24,6 +25,7 @@ import { ensureAlgorithmConfig, loadAlgorithmConfig } from './plaza-algorithm.mj
 import { createNotificationDispatcher } from './notification-dispatcher.mjs';
 import { createWechatAdminService } from './wechat-admin.mjs';
 import { createWechatMpService, loadWechatMpConfig } from './wechat-mp.mjs';
+import { createAdminSystemTestService } from './admin-system-tests.mjs';
 
 const noop = () => {};
 
@@ -36,7 +38,7 @@ const noop = () => {};
  * @param {string} [env.apiSecret]   Goosed/relay API secret.
  * @param {number} [env.defaultSignupBalanceCents]
  * @param {boolean} [env.ensureAdminUser]  Ensure an admin account exists on boot (default true).
- * @returns {Promise<{pool, userAuth, llmProviderService, plazaPosts, plazaOps, wechatAdmin}>}
+ * @returns {Promise<{pool, userAuth, llmProviderService, memoryV2ConfigService, adminSystemTestService, plazaPosts, plazaOps, wechatAdmin}>}
  */
 export async function createAdminServices(env = {}) {
   if (!isDatabaseConfigured()) {
@@ -91,6 +93,13 @@ export async function createAdminServices(env = {}) {
   }
 
   const llmProviderService = createLlmProviderService(pool, { apiTarget, apiSecret });
+  const memoryV2ConfigService = createMemoryV2AdminConfigService(pool);
+  const adminSystemTestService = createAdminSystemTestService({
+    pool,
+    userAuth,
+    portalBaseUrl: process.env.SYSTEM_TEST_PORTAL_BASE_URL
+      ?? `http://127.0.0.1:${process.env.H5_PORT ?? 8081}`,
+  });
   const wechatMpConfig = loadWechatMpConfig();
   const wechatMpService = createWechatMpService({
     config: wechatMpConfig,
@@ -116,5 +125,15 @@ export async function createAdminServices(env = {}) {
       : null,
   });
 
-  return { pool, userAuth, llmProviderService, plazaPosts, plazaOps, wechatAdmin, subscriptionService };
+  return {
+    pool,
+    userAuth,
+    llmProviderService,
+    memoryV2ConfigService,
+    adminSystemTestService,
+    plazaPosts,
+    plazaOps,
+    wechatAdmin,
+    subscriptionService,
+  };
 }