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/fixtures.py

@@ -256,11 +256,41 @@ def view_for(
     reply: int = 16,
     danmaku: int = 7,
     bvid: str | None = None,
+    title: str | None = None,
+    duration: int | None = None,
+    pages: int | None = None,
+    cover: str | None = None,
+    up_mid: int | None = None,
+    up_name: str | None = None,
+    up_face: str | None = None,
+    pubdate: int | None = None,
 ) -> dict[str, Any]:
     item = copy.deepcopy(VIEW_PAYLOAD)
     data = item["data"]
     data["aid"] = aid
     data["bvid"] = bvid or f"BV{aid}"
+    if title is not None:
+        data["title"] = title
+    if duration is not None:
+        data["duration"] = duration
+    if cover is not None:
+        data["pic"] = cover
+    if pubdate is not None:
+        data["pubdate"] = pubdate
+        data["ctime"] = pubdate
+    if pages is not None:
+        data["videos"] = pages
+        data["pages"] = [
+            {"cid": 1000 + i, "page": i + 1, "from": "vupload", "part": f"P{i + 1}"}
+            for i in range(max(1, int(pages)))
+        ]
+    owner = data.setdefault("owner", {})
+    if up_mid is not None:
+        owner["mid"] = up_mid
+    if up_name is not None:
+        owner["name"] = up_name
+    if up_face is not None:
+        owner["face"] = up_face
     data["stat"].update({
         "aid": aid,
         "view": view,