fix: close data integrity and hot-reload review findings

Backfill same-day snapshots for newly added or restored videos, preserve successful fan snapshots on resume, persist incomplete state before forced re-runs, and split collection completion from backup completion so failed backups can retry without API calls. Reject missing data payloads instead of treating them as empty folders, guard against mass-unfav on suspicious empty remote folders, rebuild Bilibili clients when credentials change, recompute primary folder ownership from active relations with per-folder fav_time, preserve original titles for dropped invalid videos, poll config every 60 seconds, and fix favsort verify interval and mixed resource types.

tests/test_snapshot.py

@@ -60,6 +60,8 @@ class SnapshotTransport:
                 urllib.parse.urlparse(url).query
             )["aid"][0])
             payload = self.views[aid]
+            if isinstance(payload, BaseException):
+                raise payload
             if isinstance(payload, HTTPResponse):
                 return payload
             return http_json(payload)
@@ -316,6 +318,115 @@ def test_force_failure_clears_last_completed():
             db.close()
 
 
+def test_new_video_after_completion_backfills_same_day():
+    with tempfile.TemporaryDirectory() as tmp:
+        transport = SnapshotTransport({1: view_for(1, view=100)})
+        db, repo, service = make_service(tmp, transport, track_fans=())
+        try:
+            add_video(repo, 1)
+            first = service.run(date=DATE)
+            assert first.completed is True
+            assert transport.count("/web-interface/view") == 1
+
+            # 当天 11:00 新入库：完成标记仍是 1，但必须补采新视频
+            add_video(repo, 2)
+            transport.views[2] = view_for(2, view=222)
+            second = service.run_if_needed(date=DATE)
+            assert second.already_completed is False
+            assert second.success == 1
+            assert second.skipped == 1
+            assert transport.count("/web-interface/view") == 2
+            assert repo.get_snapshot(DATE, 2)["view"] == 222
+            assert repo.get_snapshot(DATE, 1)["view"] == 100
+        finally:
+            db.close()
+
+
+def test_fan_resume_preserves_successful_value():
+    with tempfile.TemporaryDirectory() as tmp:
+        transport = SnapshotTransport(
+            {1: {"code": -500, "message": "x", "data": None}},
+        )
+        db, repo, service = make_service(tmp, transport, retries=1)
+        try:
+            add_video(repo, 1)
+            first = service.run(date=DATE)
+            assert first.failed == 1
+            assert first.fans_ok == 1
+            assert repo.get_up_stat(DATE, 37754047)["follower"] == 2767268
+
+            transport.views[1] = view_for(1, view=111)
+            transport.fan = {"code": -500, "message": "x", "data": None}
+            second = service.run(date=DATE)
+            assert second.fans_skipped == 1
+            assert second.fans_failed == 0
+            fan = repo.get_up_stat(DATE, 37754047)
+            assert fan["follower"] == 2767268
+            assert fan["ok"] == 1
+        finally:
+            db.close()
+
+
+def test_force_interrupt_leaves_incomplete_marker():
+    with tempfile.TemporaryDirectory() as tmp:
+        transport = SnapshotTransport({
+            1: view_for(1),
+            2: RuntimeError("simulated interrupt"),
+        })
+        db, repo, service = make_service(tmp, transport, track_fans=())
+        try:
+            add_video(repo, 1)
+            add_video(repo, 2)
+            repo.kv_set(service.completed_key(DATE), "1")
+            repo.kv_set("snapshot:last_completed", DATE)
+            try:
+                service.run(date=DATE, force=True)
+            except RuntimeError:
+                pass
+            else:
+                raise AssertionError("应模拟中断")
+            assert repo.kv_get(service.completed_key(DATE)) == "0"
+            assert repo.kv_get("snapshot:last_completed") == ""
+
+            transport.views[2] = view_for(2)
+            resumed = service.run_if_needed(date=DATE)
+            assert resumed.completed is True
+            assert resumed.success == 1
+            assert resumed.skipped == 1
+        finally:
+            db.close()
+
+
+def test_backup_failure_retries_without_api():
+    import reaction_board.services.snapshot as snapshot_module
+
+    with tempfile.TemporaryDirectory() as tmp:
+        transport = SnapshotTransport({1: view_for(1)})
+        db, repo, service = make_service(tmp, transport, track_fans=())
+        original = snapshot_module.backup_daily
+
+        def fail_backup(*args, **kwargs):
+            raise OSError("disk full")
+
+        snapshot_module.backup_daily = fail_backup
+        try:
+            first = service.run(date=DATE)
+        finally:
+            snapshot_module.backup_daily = original
+        assert first.completed is True
+        assert first.backup_error
+        assert repo.kv_get(service.backup_key(DATE)) == "0"
+        view_calls = transport.count("/web-interface/view")
+
+        retried = service.run_if_needed(date=DATE)
+        assert retried.already_completed is True
+        assert retried.backup_error is None
+        assert Path(retried.backup_path or "").exists()
+        assert repo.kv_get(service.backup_key(DATE)) == "1"
+        assert transport.count("/web-interface/view") == view_calls
+        db.close()
+
+
 def main():
     test_snapshot_success_resume_and_force()
     test_resume_skips_ok_and_retries_failed()
@@ -325,6 +436,10 @@ def main():
     test_auth_invalid_is_warned_but_snapshot_continues()
     test_no_cookie_skips_nav_request()
     test_force_failure_clears_last_completed()
+    test_new_video_after_completion_backfills_same_day()
+    test_fan_resume_preserves_successful_value()
+    test_force_interrupt_leaves_incomplete_marker()
+    test_backup_failure_retries_without_api()
     print("OK: 每日快照、断点续跑、失败占位与粉丝采集测试全部通过")