refactor: mover CTA_HELP a shared.ts y usarlo en nueva

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

src/services/commands/handlers/nueva.ts

@@ -9,6 +9,7 @@ import { Metrics } from '../../metrics';
 import { ICONS } from '../../../utils/icons';
 import { codeId, formatDDMM } from '../../../utils/formatting';
 import { parseNueva } from '../parsers/nueva';
+import { CTA_HELP } from '../shared';
 import { buildJitAssigneePrompt, maybeEnqueueOnboardingBundle } from '../../onboarding';
 
 type Ctx = {
@@ -27,7 +28,6 @@ type Msg = {
   mentions?: string[];
 };
 
-const CTA_HELP = 'ℹ️ Tus tareas: `/t mias` · Todas: `/t todas` · Info: `/t info` · Web: `/t web`';
 
 export async function handleNueva(context: Ctx, deps: { db: Database }): Promise<Msg[]> {
   const tokens = (context.message || '').trim().split(/\s+/);

src/services/commands/shared.ts

@@ -51,6 +51,8 @@ export const SCOPE_ALIASES: Record<string, 'mis' | 'todos'> = {
   'yo': 'mis'
 };
 
+export const CTA_HELP = 'ℹ️ Tus tareas: `/t mias` · Todas: `/t todas` · Info: `/t info` · Web: `/t web`';
+
 /**
  * Formatea un Date a YYYY-MM-DD respetando TZ (por defecto Europe/Madrid).
  */