feat: thread QR/status callbacks through session pool; persist to DB in main

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/worker/src/whatsapp/session-pool.test.ts

@@ -89,4 +89,21 @@ describe('WhatsAppSessionPool', () => {
     await capturedOnMessage(fakeMsg);
     expect(onMessage).toHaveBeenCalledWith(fakeMsg, 'acc_1');
   });
+
+  it('add() injects accountId into onQr callback', async () => {
+    const onQr = jest.fn();
+    const { createWhatsAppSession } = require('./session');
+
+    let capturedOnQr: any;
+    (createWhatsAppSession as jest.Mock).mockImplementationOnce(
+      (_id: string, _path: string, _onMsg: any, _onReaction: any, _onGroups: any, _onReconnect: any, qrCb: any) => {
+        capturedOnQr = qrCb;
+        return Promise.resolve({ sendMessage: jest.fn(), logout: jest.fn(), end: jest.fn() });
+      },
+    );
+
+    await pool.add('acc_1', './sessions/1', jest.fn(), jest.fn(), jest.fn(), onQr);
+    await capturedOnQr('test-qr');
+    expect(onQr).toHaveBeenCalledWith('test-qr', 'acc_1');
+  });
 });

apps/worker/src/whatsapp/session-pool.ts

@@ -11,6 +11,8 @@ export type PoolMessageCallback = (msg: NormalizedMessage, accountId: string) =>
 export type PoolReactionCallback = (reaction: NormalizedReaction, accountId: string) => Promise<void> | void;
 // groups typed as `any` to avoid leaking GroupMetadata (Baileys type) into main.ts
 export type PoolGroupsCallback = (groups: any, accountId: string) => Promise<void> | void;
+export type PoolQrCallback = (qr: string, accountId: string) => Promise<void> | void;
+export type PoolStatusCallback = (status: string, accountId: string) => Promise<void> | void;
 
 export class WhatsAppSessionPool {
   private sessions = new Map<string, WASocket>();
@@ -21,6 +23,8 @@ export class WhatsAppSessionPool {
     onMessage: PoolMessageCallback,
     onReaction: PoolReactionCallback,
     onGroups: PoolGroupsCallback,
+    onQr?: PoolQrCallback,
+    onStatus?: PoolStatusCallback,
   ): Promise<void> {
     logger.info({ accountId }, 'Starting session');
     const sock = await createWhatsAppSession(
@@ -33,6 +37,8 @@ export class WhatsAppSessionPool {
         logger.info({ accountId }, 'Session reconnected — updating pool');
         this.sessions.set(accountId, newSocket);
       },
+      onQr ? (qr) => onQr(qr, accountId) : undefined,
+      onStatus ? (status) => onStatus(status, accountId) : undefined,
     );
     this.sessions.set(accountId, sock);
   }