test: inicializar BD en memoria y configurar DB global en command.help

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

tests/unit/services/command.help.test.ts

@@ -1,7 +1,22 @@
-import { describe, it, expect } from 'bun:test';
+import { describe, it, expect, beforeAll, afterAll } from 'bun:test';
+import { Database } from 'bun:sqlite';
+import { initializeDatabase } from '../../../src/db';
+import { setDb, resetDb } from '../../../src/db/locator';
 import { CommandService } from '../../../src/services/command';
 
 describe('CommandService - /t ayuda y /t ayuda avanzada usando help centralizado', () => {
+  let memdb: Database;
+
+  beforeAll(() => {
+    memdb = new Database(':memory:');
+    initializeDatabase(memdb);
+    setDb(memdb);
+  });
+
+  afterAll(() => {
+    resetDb();
+    try { (memdb as any)?.close?.(); } catch {}
+  });
   it('"/t ayuda" incluye quick help y CTA a ayuda avanzada', async () => {
     const res = await CommandService.handle({
       sender: '600000001',