feat(p1): add daily snapshots and fan tracking

Implement P1: seven-metric view snapshots, relation/stat fan snapshots, failure placeholders, resume by daily completion markers, Cookie login warnings, daily SQLite backups, Shanghai daily scheduling, and CLI snapshot/auth-check commands. Real read-only run captured 795/795 videos successfully over 1124s with a verified daily backup.

tests/test_cli.py

@@ -12,9 +12,11 @@ from pathlib import Path
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.stdout.reconfigure(encoding="utf-8")
 
+from reaction_board.bilibili.models import LoginState  # noqa: E402
 from reaction_board.cli import main  # noqa: E402
 from reaction_board.database import Database  # noqa: E402
 from reaction_board.repository import Repository  # noqa: E402
+import reaction_board.cli as cli  # noqa: E402
 
 
 def write_config(tmp, *, cookie="SESSDATA=x; buvid3=y", csrf="csrf"):
@@ -86,24 +88,61 @@ def test_sync_requires_auth_without_network():
         assert not (Path(tmp) / "app.db").exists()
 
 
-def test_run_once_without_folders():
+def test_snapshot_offline_empty_db():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        data = json.loads(path.read_text(encoding="utf-8"))
+        data["folders"] = []
+        data["track_fans"] = []
+        path.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
+        code, output = run_cli(["snapshot", "--config", str(path)])
+        assert code == 0
+        assert '"completed": true' in output
+        assert '"total": 0' in output
+        assert len(list((Path(tmp) / "backup").glob("app-*.db"))) == 1
+
+
+def test_auth_check_without_cookie():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        code, output = run_cli(["auth-check", "--config", str(path)])
+        assert code == 1
+        payload = json.loads(output)
+        assert payload["is_login"] is False
+        assert "未配置 cookie" in payload["message"]
+
+
+def test_run_once_offline():
+    class FakeClient:
+        def check_login(self):
+            return LoginState(True, 1, "tester", 0, "OK")
+
     with tempfile.TemporaryDirectory() as tmp:
         path = write_config(tmp)
         data = json.loads(path.read_text(encoding="utf-8"))
         data["folders"] = []
+        data["track_fans"] = []
         path.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
-        code, output = run_cli(["run", "--once", "--config", str(path)])
+
+        original = cli._client
+        cli._client = lambda *args, **kwargs: FakeClient()
+        try:
+            code, output = run_cli(["run", "--once", "--config", str(path)])
+        finally:
+            cli._client = original
         assert code == 0
         assert '"name": "folder_sync"' in output
-        assert '"ok": true' in output
+        assert '"name": "snapshot"' in output
 
 
 def main_test():
     test_init_and_status()
     test_missing_config()
     test_sync_requires_auth_without_network()
-    test_run_once_without_folders()
-    print("OK: CLI init/sync/run/status/错误路径测试全部通过")
+    test_snapshot_offline_empty_db()
+    test_auth_check_without_cookie()
+    test_run_once_offline()
+    print("OK: CLI init/sync/snapshot/auth-check/run/status/错误路径测试全部通过")
 
 
 if __name__ == "__main__":