diff --git a/apps/web/src/lib/server/env.ts b/apps/web/src/lib/server/env.ts
index dd99706..188684c 100644
--- a/apps/web/src/lib/server/env.ts
+++ b/apps/web/src/lib/server/env.ts
@@ -44,3 +44,10 @@ export const icsRateLimitPerMin = Math.max(0, Math.floor(ICS_RATE_LIMIT_PER_MIN)
 const UNCOMPLETE_WINDOW_MIN_RAW = Number(env.UNCOMPLETE_WINDOW_MIN || 1440);
 export const UNCOMPLETE_WINDOW_MIN = Math.max(1, Math.floor(UNCOMPLETE_WINDOW_MIN_RAW));
 export const uncompleteWindowMs = UNCOMPLETE_WINDOW_MIN * 60 * 1000;
+
+// Reacciones (flags de característica para la web)
+const REACTIONS_TTL_DAYS_RAW = Number(env.REACTIONS_TTL_DAYS || 14);
+export const REACTIONS_TTL_DAYS = Math.max(1, Math.floor(REACTIONS_TTL_DAYS_RAW));
+export const REACTIONS_ENABLED = toBool(env.REACTIONS_ENABLED || '');
+export const REACTIONS_SCOPE = ((env.REACTIONS_SCOPE || 'groups').trim().toLowerCase() === 'all' ? 'all' : 'groups');
+export const GROUP_GATING_MODE = (env.GROUP_GATING_MODE || 'off').trim().toLowerCase();
diff --git a/apps/web/src/routes/api/tasks/[id]/complete/+server.ts b/apps/web/src/routes/api/tasks/[id]/complete/+server.ts
index ead73aa..6ab6da3 100644
--- a/apps/web/src/routes/api/tasks/[id]/complete/+server.ts
+++ b/apps/web/src/routes/api/tasks/[id]/complete/+server.ts
@@ -1,5 +1,6 @@
 import type { RequestHandler } from './$types';
 import { getDb } from '$lib/server/db';
+import { REACTIONS_ENABLED, REACTIONS_TTL_DAYS, REACTIONS_SCOPE, GROUP_GATING_MODE } from '$lib/server/env';
 
 export const POST: RequestHandler = async (event) => {
   const userId = event.locals.userId ?? null;
@@ -101,6 +102,75 @@ export const POST: RequestHandler = async (event) => {
 
   const statusStr = Number(updated.completed || 0) === 1 ? 'updated' : 'already';
 
+  // Encolar reacción ✅ desde la web si procede (idéntico formato al bot)
+  try {
+    if (statusStr === 'updated' && REACTIONS_ENABLED) {
+      // Buscar origen con columnas opcionales (participant/from_me) si existen
+      let origin: any = null;
+      try {
+        origin = db.prepare(`
+    SELECT chat_id, message_id, created_at, participant, from_me
+    FROM task_origins
+    WHERE task_id = ?
+  `).get(taskId) as any;
+      } catch {
+        origin = db.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);
+
+        // Scope: por defecto solo reaccionar en grupos
+        if (REACTIONS_SCOPE === 'all' || chatId.endsWith('@g.us')) {
+          // TTL (por defecto 14 días)
+          const ttlMs = REACTIONS_TTL_DAYS * 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 <= ttlMs) : false;
+
+          // Gating 'enforce' (solo aplica a grupos)
+          let allowed = true;
+          if (GROUP_GATING_MODE === 'enforce' && chatId.endsWith('@g.us')) {
+            const row = db.prepare(`SELECT 1 FROM allowed_groups WHERE group_id = ? AND status = 'allowed' LIMIT 1`).get(chatId) as any;
+            allowed = !!row;
+          }
+
+          if (withinTtl && allowed) {
+            // Idempotencia 24h por metadata canónica exacta
+            const nowIso = new Date().toISOString().replace('T', ' ').replace('Z', '');
+            const cutoff = new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString().replace('T', ' ').replace('Z', '');
+
+            const meta: any = { kind: 'reaction', emoji: '✅', chatId, messageId: String(origin.message_id) };
+            if (origin && (origin.from_me === 1 || origin.from_me === true)) meta.fromMe = true;
+            if (origin && origin.participant) meta.participant = String(origin.participant);
+            const metadata = JSON.stringify(meta);
+
+            const exists = db.prepare(`
+      SELECT 1
+      FROM response_queue
+      WHERE metadata = ?
+        AND status IN ('queued','processing','sent')
+        AND (updated_at > ? OR created_at > ?)
+      LIMIT 1
+    `).get(metadata, cutoff, cutoff) as any;
+
+            if (!exists) {
+              db.prepare(`
+      INSERT INTO response_queue (recipient, message, metadata, next_attempt_at)
+      VALUES (?, ?, ?, ?)
+    `).run(chatId, '', metadata, nowIso);
+            }
+          }
+        }
+      }
+    }
+  } catch {}
+
   const body = {
     status: statusStr,
     task: {