feat(snapshot): refresh API video metadata; keep removed visible

入库 / 小时近新片 / 全量快照成功时以 view_detail 覆盖 title、duration、
pages、cover、bvid、up_*、pubdate 等接口字段，并照旧写七项快照。
原站失效仅标 removed，不删行、不空写元数据；列表与详情继续展示，
快照队列仍跳过 removed。

tests/test_snapshot.py

@@ -216,14 +216,86 @@ def test_unavailable_marks_removed():
         try:
             add_video(repo, 1)
             add_video(repo, 2)
+            before = repo.get_video(1)
             result = service.run(date=DATE)
             assert result.removed == 2
             assert result.failed == 0
             assert result.completed is True
-            assert repo.get_video(1)["status"] == "removed"
-            assert repo.get_video(2)["status"] == "removed"
+            video1 = repo.get_video(1)
+            video2 = repo.get_video(2)
+            assert video1["status"] == "removed"
+            assert video2["status"] == "removed"
+            # 失效只改 status，不得抹元数据 / 不得写空快照
+            assert video1["title"] == before["title"]
+            assert video1["duration"] == before["duration"]
+            assert video1["bvid"] == before["bvid"]
             assert repo.get_snapshot(DATE, 1) is None
             assert repo.get_snapshot(DATE, 2) is None
+            # removed 不再进入后续快照队列
+            assert 1 not in repo.video_aids_for_snapshot()
+            assert 2 not in repo.video_aids_for_snapshot()
+        finally:
+            db.close()
+
+
+def test_snapshot_refreshes_video_metadata():
+    """快照成功路径以 view_detail 覆盖 pages/duration/title 等元数据。"""
+    with tempfile.TemporaryDirectory() as tmp:
+        transport = SnapshotTransport({
+            1: view_for(
+                1, view=111, title="新标题P3", duration=3600, pages=3,
+                cover="http://example/new.jpg", up_name="新UP",
+            ),
+        })
+        db, repo, service = make_service(tmp, transport, track_fans=())
+        try:
+            add_video(repo, 1)
+            old = repo.get_video(1)
+            assert old["title"] == "视频1"
+            assert old["duration"] == 600
+            assert old.get("pages") in (None, 0) or old["pages"] != 3
+            result = service.run_videos(date=DATE)
+            assert result.success == 1
+            video = repo.get_video(1)
+            assert video["title"] == "新标题P3"
+            assert video["duration"] == 3600
+            assert video["pages"] == 3
+            assert video["cover"] == "http://example/new.jpg"
+            assert video["up_name"] == "新UP"
+            assert video["status"] == "active"
+            snap = repo.get_snapshot(DATE, 1)
+            assert snap["view"] == 111 and snap["ok"] == 1
+        finally:
+            db.close()
+
+
+def test_recent_snapshot_refreshes_metadata():
+    with tempfile.TemporaryDirectory() as tmp:
+        now = 1_800_000_000
+        transport = SnapshotTransport({
+            7: view_for(7, view=77, title="近新片加P", duration=1200, pages=2,
+                        pubdate=now - 3600),
+        })
+        db, repo, service = make_service(tmp, transport, track_fans=())
+        try:
+            repo.upsert_from_fav(
+                FavResource(
+                    aid=7, bvid="BV7", title="旧标题", up_mid=100,
+                    up_name="UP", pubdate=now - 3600, duration=300,
+                    cover=None, attr=0, fav_time=None, pages=1,
+                ),
+                FOLDER.media_id,
+                was_added=True,
+            )
+            result = service.run_recent_videos(date=DATE, recent_days=2)
+            assert result.success == 1
+            video = repo.get_video(7)
+            assert video["title"] == "近新片加P"
+            assert video["duration"] == 1200
+            assert video["pages"] == 2
+            assert repo.get_snapshot(DATE, 7)["view"] == 77
+            # recent 不推进完成日
+            assert repo.kv_get("snapshot:last_completed") in (None, "")
         finally:
             db.close()
 
@@ -440,11 +512,12 @@ def test_run_recent_videos_refreshes_without_completion_markers():
     """小时任务只刷新近窗新片，不写完成日 / 备份。"""
     clock = 1_800_000_000
     with tempfile.TemporaryDirectory() as tmp:
+        # view_for 须带与库内一致的 pubdate，否则快照回写会把近窗片挤出窗口
         transport = SnapshotTransport({
-            1: view_for(1, view=111),
-            2: view_for(2, view=222),
-            3: view_for(3, view=333),
-            4: view_for(4, view=444),
+            1: view_for(1, view=111, pubdate=clock - 3600),
+            2: view_for(2, view=222, pubdate=clock - 86400),
+            3: view_for(3, view=333, pubdate=clock - 10 * 86400),
+            4: view_for(4, view=444, pubdate=clock - 10 * 86400),
         })
         db, repo, service = make_service(tmp, transport, track_fans=())
         try:
@@ -776,6 +849,8 @@ def main():
     test_snapshot_success_resume_and_force()
     test_resume_skips_ok_and_retries_failed()
     test_unavailable_marks_removed()
+    test_snapshot_refreshes_video_metadata()
+    test_recent_snapshot_refreshes_metadata()
     test_other_error_writes_failed_placeholder()
     test_fan_failure_placeholder()
     test_auth_invalid_is_warned_but_snapshot_continues()