feat: encolar reacción ✅ al completar tarea dentro TTL y filtrado

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

src/tasks/service.ts

@@ -2,6 +2,8 @@ import type { Database } from 'bun:sqlite';
 import { db, ensureUserExists } from '../db';
 import { AllowedGroups } from '../services/allowed-groups';
 import { isGroupId } from '../utils/whatsapp';
+import { ResponseQueue } from '../services/response-queue';
+import { Metrics } from '../services/metrics';
 
 type CreateTaskInput = {
   description: string;
@@ -278,6 +280,53 @@ export class TaskService {
       `)
       .run(ensured, taskId);
 
+    // Fase 2: reacción ✅ al completar dentro del TTL y con gating
+    try {
+      const rxEnabled = String(process.env.REACTIONS_ENABLED || 'false').toLowerCase();
+      const enabled = ['true','1','yes','on'].includes(rxEnabled);
+      if (enabled) {
+        const origin = this.dbInstance.prepare(`
+          SELECT chat_id, message_id, created_at
+          FROM task_origins
+          WHERE task_id = ?
+        `).get(taskId) as any;
+
+        if (origin && origin.chat_id && origin.message_id) {
+          const chatId = String(origin.chat_id);
+          const scope = String(process.env.REACTIONS_SCOPE || 'groups').toLowerCase();
+          if (scope === 'all' || isGroupId(chatId)) {
+            // TTL desde REACTIONS_TTL_DAYS (usar tal cual; default 14 si inválido)
+            const ttlDaysEnv = Number(process.env.REACTIONS_TTL_DAYS);
+            const ttlDays = Number.isFinite(ttlDaysEnv) && ttlDaysEnv > 0 ? ttlDaysEnv : 14;
+            const maxAgeMs = ttlDays * 24 * 60 * 60 * 1000;
+
+            const createdRaw = String(origin.created_at || '');
+            const createdIso = createdRaw.includes('T') ? createdRaw : (createdRaw.replace(' ', 'T') + 'Z');
+            const createdMs = Date.parse(createdIso);
+            const withinTtl = Number.isFinite(createdMs) ? (Date.now() - createdMs <= maxAgeMs) : false;
+
+            if (withinTtl) {
+              // Gating 'enforce' para grupos
+              let allowed = true;
+              if (isGroupId(chatId)) {
+                try { (AllowedGroups as any).dbInstance = this.dbInstance; } catch {}
+                const mode = String(process.env.GROUP_GATING_MODE || 'off').toLowerCase();
+                if (mode === 'enforce') {
+                  try { allowed = AllowedGroups.isAllowed(chatId); } catch { allowed = true; }
+                }
+              }
+              if (allowed) {
+                // Encolar reacción ✅ con idempotencia; no bloquear si falla
+                ResponseQueue.enqueueReaction(chatId, String(origin.message_id), '✅')
+                  .then(() => { try { Metrics.inc('reactions_enqueued_total', 1, { emoji: 'check' }); } catch {} })
+                  .catch(() => {});
+              }
+            }
+          }
+        }
+      }
+    } catch {}
+
     return {
       status: 'updated',
       task: {