feat(tabs): COD-359 add owner-scoped tab layouts

test/scheduled-layout-registration.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it, vi } from 'vitest';
+import { readFileSync } from 'node:fs';
+import { WebServer } from '../src/web/server.js';
+
+describe('scheduled session layout registration', () => {
+  it('registers the layout before lifecycle work and rolls back a rejected tentative session', async () => {
+    const sessions = new Map<string, { id: string; owner?: string }>();
+    const session = { id: 'scheduled-session', owner: 'alice' };
+    const sessionCreated = vi.fn(async () => {
+      throw new Error('layout unavailable');
+    });
+    const server = Object.create(WebServer.prototype) as {
+      sessions: typeof sessions;
+      tabLayouts: { sessionCreated: typeof sessionCreated };
+      registerSessionWithLayout(session: typeof session): Promise<void>;
+    };
+    server.sessions = sessions;
+    server.tabLayouts = { sessionCreated };
+
+    await expect(server.registerSessionWithLayout(session)).rejects.toThrow('layout unavailable');
+
+    expect(sessionCreated).toHaveBeenCalledWith('alice');
+    expect(sessions.has(session.id)).toBe(false);
+  });
+
+  it('uses the shared registration helper in the scheduled loop before persistence and listeners', () => {
+    const source = readFileSync(new URL('../src/web/server.ts', import.meta.url), 'utf8');
+    const loop = source.slice(
+      source.indexOf('private async runScheduledLoop'),
+      source.indexOf('private async stopScheduledRun')
+    );
+
+    expect(loop).toContain('await this.registerSessionWithLayout(session);');
+    expect(loop.indexOf('await this.registerSessionWithLayout(session);')).toBeLessThan(
+      loop.indexOf('this.store.incrementSessionsCreated();')
+    );
+    expect(loop.indexOf('await this.registerSessionWithLayout(session);')).toBeLessThan(
+      loop.indexOf('await this.setupSessionListeners(session);')
+    );
+  });
+});