fix: settings siempre retorna objeto, autocomplete Colombia con bias de ubicacion

- GET /settings retorna {} en lugar de undefined cuando no hay configuracion
  (evita error jsonDecode en Flutter que dejaba soporte en gris)
- Autocomplete: agrega components=country:co, radius 20km, remove types=address
  para mostrar mas resultados cercanos al usuario

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

admin/src/app/autocomplete/route.ts

@@ -43,9 +43,13 @@ export async function GET(req: NextRequest) {
   placesUrl.searchParams.set('input', input);
   placesUrl.searchParams.set('key', apiKey);
   placesUrl.searchParams.set('language', 'es');
-  placesUrl.searchParams.set('types', 'address');
+  placesUrl.searchParams.set('components', 'country:co');
-  if (location) placesUrl.searchParams.set('location', location);
+  // Bias results strongly to user location (20km circle)
-  if (location) placesUrl.searchParams.set('radius', '50000');
+  if (location) {
+    placesUrl.searchParams.set('location', location);
+    placesUrl.searchParams.set('radius', '20000');
+    placesUrl.searchParams.set('strictbounds', 'false');
+  }
 
   try {
     const res = await fetch(placesUrl.toString(), { cache: 'no-store' });

backend/src/settings/settings.service.ts

@@ -10,7 +10,7 @@ export class SettingsService {
 
   async getGlobal() {
     const setting = await this.prisma.settings.findUnique({ where: { key: 'global' } });
-    return setting?.value;
+    return (setting?.value as Record<string, any>) ?? {};
   }
 
   async updateGlobal(value: Record<string, any>) {