fix: add session origin tracking + idle rotation foundation (schema/auth/config)

Backend infrastructure for WeChat/H5 session unification:

- schema.sql: h5_user_sessions adds origin ENUM('h5','wechat') column
- db.mjs: idempotent migration for origin column (adds after user_id)
- user-auth.mjs:
  - setSessionOrigin(sessionId, origin) - tag where session was created
  - getSessionOrigins(sessionIds) - batch lookup for history labeling
  - touchWechatAgentRoute(appId, openid) - refresh activity timestamp
- wechat-mp.mjs:
  - DEFAULT_SESSION_IDLE_ROTATE_MS = 30min (env-configurable)
  - loadWechatMpConfig includes sessionIdleRotateMs

Tests: 50/50 pass ✓

Still TODO:
- ensureWechatAgentSession idle rotation check + setSessionOrigin call
- runIntentMessage grantedSkills flow + touchWechatAgentRoute calls
- Frontend type/UI component updates
- Integration test for idle rotation

Co-Authored-By: Claude <noreply@anthropic.com>

db.mjs

@@ -387,6 +387,12 @@ export async function migrateSchema(pool) {
     );
   }
 
+  if (!(await columnExists(pool, 'h5_user_sessions', 'origin'))) {
+    await pool.query(
+      `ALTER TABLE h5_user_sessions ADD COLUMN origin ENUM('h5', 'wechat') NOT NULL DEFAULT 'h5' AFTER user_id`,
+    );
+  }
+
   if (!(await columnExists(pool, 'h5_session_snapshots', 'display_title'))) {
     await pool.query(
       `ALTER TABLE h5_session_snapshots ADD COLUMN display_title VARCHAR(512) NOT NULL DEFAULT '' AFTER name`,

schema.sql

@@ -350,6 +350,7 @@ CREATE TABLE IF NOT EXISTS h5_user_path_grants (
 CREATE TABLE IF NOT EXISTS h5_user_sessions (
   agent_session_id VARCHAR(128) NOT NULL PRIMARY KEY,
   user_id CHAR(36) NOT NULL,
+  origin ENUM('h5', 'wechat') NOT NULL DEFAULT 'h5',
   created_at BIGINT NOT NULL,
   KEY idx_h5_user_sessions_user (user_id),
   CONSTRAINT fk_h5_session_user FOREIGN KEY (user_id) REFERENCES h5_users(id) ON DELETE CASCADE

user-auth.mjs

@@ -764,6 +764,24 @@ export function createUserAuth(pool, options = {}) {
     return new Set(rows.map((row) => row.agent_session_id));
   };
 
+  const setSessionOrigin = async (agentSessionId, origin) => {
+    if (!agentSessionId || (origin !== 'h5' && origin !== 'wechat')) return;
+    await pool.query(
+      `UPDATE h5_user_sessions SET origin = ? WHERE agent_session_id = ?`,
+      [origin, agentSessionId],
+    );
+  };
+
+  const getSessionOrigins = async (agentSessionIds = []) => {
+    const ids = [...new Set(agentSessionIds)].filter(Boolean);
+    if (ids.length === 0) return new Map();
+    const [rows] = await pool.query(
+      `SELECT agent_session_id, origin FROM h5_user_sessions WHERE agent_session_id IN (?)`,
+      [ids],
+    );
+    return new Map(rows.map((row) => [row.agent_session_id, row.origin]));
+  };
+
   const unregisterAgentSession = async (userId, agentSessionId) => {
     await pool.query(
       `DELETE FROM h5_user_sessions WHERE agent_session_id = ? AND user_id = ?`,
@@ -2221,6 +2239,14 @@ export function createUserAuth(pool, options = {}) {
     ]);
   };
 
+  const touchWechatAgentRoute = async (appId, openid, now = Date.now()) => {
+    if (!appId || !openid) return;
+    await pool.query(
+      `UPDATE h5_wechat_agent_routes SET updated_at = ? WHERE app_id = ? AND openid = ?`,
+      [now, appId, openid],
+    );
+  };
+
   const recordWechatMpMessage = async ({
     appId,
     openid,
@@ -2806,6 +2832,7 @@ export function createUserAuth(pool, options = {}) {
     getWechatAgentRoute,
     upsertWechatAgentRoute,
     clearWechatAgentRoute,
+    touchWechatAgentRoute,
     recordWechatMpMessage,
     finishWechatMpMessage,
     insertWechatMpMessageDetail,
@@ -2825,6 +2852,8 @@ export function createUserAuth(pool, options = {}) {
     unregisterAgentSession,
     ownsSession,
     listOwnedSessionIds,
+    setSessionOrigin,
+    getSessionOrigins,
     canUseChat,
     getUserById,
     getUserPublic,

wechat-mp.mjs

@@ -25,6 +25,7 @@ const DEFAULT_STATUS_TEXT =
 const DEFAULT_UNSUPPORTED_TEXT = '当前先支持文字消息，你可以直接发文字给我。';
 const DEFAULT_UNBOUND_TEXT = '先点这里完成绑定，再继续和专属 Agent 对话：';
 const DEFAULT_PROGRESS_DELAY_MS = 8000;
+const DEFAULT_SESSION_IDLE_ROTATE_MS = 30 * 60 * 1000;
 const PUBLIC_HTML_LINK_PATTERN =
   /https?:\/\/[^\s<>"')\]]+\/MindSpace\/([0-9a-f-]{36}|[a-z0-9._-]+)\/public\/([^\s<>"')\]]+\.html)/gi;
 const SESSION_WORKSPACE_TOOL_NAMES = new Set([
@@ -1254,6 +1255,10 @@ export function loadWechatMpConfig(env = process.env) {
       0,
       Number(env.H5_WECHAT_MP_PROGRESS_DELAY_MS ?? DEFAULT_PROGRESS_DELAY_MS),
     ),
+    sessionIdleRotateMs: Math.max(
+      0,
+      Number(env.H5_WECHAT_MP_SESSION_IDLE_ROTATE_MS ?? DEFAULT_SESSION_IDLE_ROTATE_MS),
+    ),
     statusText: env.H5_WECHAT_MP_STATUS_TEXT?.trim() || DEFAULT_STATUS_TEXT,
     unsupportedText: env.H5_WECHAT_MP_UNSUPPORTED_TEXT?.trim() || DEFAULT_UNSUPPORTED_TEXT,
     unboundTextPrefix: env.H5_WECHAT_MP_UNBOUND_TEXT_PREFIX?.trim() || DEFAULT_UNBOUND_TEXT,