diff --git a/yunke-server/app/sync/scheduler.py b/yunke-server/app/sync/scheduler.py
index 3a9333f..a504dc0 100644
--- a/yunke-server/app/sync/scheduler.py
+++ b/yunke-server/app/sync/scheduler.py
@@ -524,6 +524,17 @@ class SyncScheduler:
             coalesce=True,
             max_instances=1,
         )
+        # 每周全量对齐(周日 05:00):--full-history 强制翻全历史,修增量模式
+        # 抓不到的撤回/编辑 + 消除 lastChatTime 滞后窗口
+        sched.add_job(
+            self._safe_page_run,
+            CronTrigger(day_of_week="sun", hour=5, timezone=self.timezone),
+            args=["full-history"],
+            id="yunke_weekly_full_history",
+            replace_existing=True,
+            coalesce=True,
+            max_instances=1,
+        )
         sched.start()
         self._scheduler = sched
         logger.info(
@@ -595,6 +606,22 @@ class SyncScheduler:
                         str(self.max_conversations_per_run),
                     ],
                 ]
+            elif kind == "full-history":
+                # 每周全量对齐(周日 05:00):强制全量翻历史,对齐增量模式抓不到的
+                # 撤回/编辑消息 + 彻底消除 lastChatTime 滞后窗口(2026-08-21)
+                entities = ["messages", "group-messages", "wa-messages", "wa-group-messages"]
+                commands = [
+                    [
+                        sys.executable,
+                        "scripts/scrape_via_page.py",
+                        "--entity",
+                        e,
+                        "--max-conversations",
+                        "99999",
+                        "--full-history",
+                    ]
+                    for e in entities
+                ]
             else:
                 logger.error("page sync: unknown kind %r", kind)
                 return
diff --git a/yunke-server/tests/test_sync_scheduler.py b/yunke-server/tests/test_sync_scheduler.py
index 6bcec2f..4d607c1 100644
--- a/yunke-server/tests/test_sync_scheduler.py
+++ b/yunke-server/tests/test_sync_scheduler.py
@@ -416,10 +416,10 @@ async def test_start_registers_two_jobs_with_expected_triggers(engine, session_m
     with patch.object(scheduler_module, "AsyncIOScheduler", return_value=spy):
         await sched.start()
 
-    # Two jobs registered.
-    assert spy.add_job.call_count == 2
+    # Three jobs registered (2026-08-21 加每周全量对齐).
+    assert spy.add_job.call_count == 3
     job_ids = {c.kwargs["id"] for c in spy.add_job.call_args_list}
-    assert job_ids == {"yunke_full_sync", "yunke_message_sync"}
+    assert job_ids == {"yunke_full_sync", "yunke_message_sync", "yunke_weekly_full_history"}
 
     # Full sync -> CronTrigger(hour=3); messages -> IntervalTrigger(hours=6).
     # add_job was called as (func, trigger, kwargs...) so trigger is args[1].
@@ -444,6 +444,16 @@ async def test_start_registers_two_jobs_with_expected_triggers(engine, session_m
     assert msg_call.args[0].__name__ == "_safe_page_run"
     assert msg_call.kwargs["args"] == ["messages"]
 
+    # Weekly full-history: Sunday 05:00 CronTrigger.
+    weekly_call = next(
+        c for c in spy.add_job.call_args_list if c.kwargs["id"] == "yunke_weekly_full_history"
+    )
+    weekly_trigger = weekly_call.args[1]
+    assert "day_of_week='sun'" in str(weekly_trigger)
+    assert "hour='5'" in str(weekly_trigger) or "hour='5'" in repr(weekly_trigger)
+    assert weekly_call.args[0].__name__ == "_safe_page_run"
+    assert weekly_call.kwargs["args"] == ["full-history"]
+
     # coalesce=True + max_instances=1 protects against overlap.
     for c in spy.add_job.call_args_list:
         assert c.kwargs["coalesce"] is True