feat(p0): add favorite folder sync and sqlite data foundation

Implement P0 of the reaction dashboard: config loading with hot reload, SQLite migrations with backups, single-writer queue, read-only Bilibili fav client, folder import/diff sync, invalid-resource handling, blacklist seed, scheduler, and JSON redacted logging. Includes offline unit and transport-level contract tests; all existing and new tests pass.

tests/test_cli.py

@@ -0,0 +1,110 @@
+# -*- coding: utf-8 -*-
+"""CLI 入口测试（离线）: uv run python tests/test_cli.py"""
+
+import contextlib
+import io
+import json
+import os
+import sys
+import tempfile
+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.cli import main  # noqa: E402
+from reaction_board.database import Database  # noqa: E402
+from reaction_board.repository import Repository  # noqa: E402
+
+
+def write_config(tmp, *, cookie="SESSDATA=x; buvid3=y", csrf="csrf"):
+    path = Path(tmp) / "config.json"
+    path.write_text(json.dumps({
+        "mid": 1,
+        "csrf": csrf,
+        "cookie": cookie,
+        "storage": {
+            "database_path": str(Path(tmp) / "app.db"),
+            "backup_dir": str(Path(tmp) / "backup"),
+        },
+        "folders": [
+            {"year": 2025, "media_id": 11, "title": "2025"},
+            {"year": 2026, "media_id": 22, "title": "2026"},
+        ],
+        "up_blacklist_seed": [101, 202],
+    }, ensure_ascii=False), encoding="utf-8")
+    return path
+
+
+def run_cli(argv):
+    out = io.StringIO()
+    with contextlib.redirect_stdout(out):
+        code = main(argv)
+    return code, out.getvalue()
+
+
+def test_init_and_status():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp)
+        code, output = run_cli(["init", "--config", str(path)])
+        assert code == 0
+        assert '"schema_version": 1' in output
+
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            assert len(repo.list_folders()) == 2
+            assert [r["mid"] for r in repo.blacklist()] == [101, 202]
+            assert repo.counts()["video_total"] == 0
+        finally:
+            db.close()
+
+        code, output = run_cli(["status", "--config", str(path)])
+        assert code == 0
+        assert '"configured_folders"' in output
+        assert '"media_count": null' in output
+        assert '"video_total": 0' in output
+
+
+def test_missing_config():
+    with tempfile.TemporaryDirectory() as tmp:
+        code, output = run_cli(["init", "--config", str(Path(tmp) / "nope.json")])
+        assert code == 2
+        payload = json.loads(output.strip().splitlines()[-1])
+        assert payload["level"] == "error"
+        assert "缺少配置文件" in payload["error"]
+
+
+def test_sync_requires_auth_without_network():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp, cookie="", csrf="")
+        code, output = run_cli(["sync", "--config", str(path)])
+        assert code == 2
+        payload = json.loads(output.strip().splitlines()[-1])
+        assert "cookie" in payload["error"]
+        assert not (Path(tmp) / "app.db").exists()
+
+
+def test_run_once_without_folders():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp)
+        data = json.loads(path.read_text(encoding="utf-8"))
+        data["folders"] = []
+        path.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
+        code, output = run_cli(["run", "--once", "--config", str(path)])
+        assert code == 0
+        assert '"name": "folder_sync"' in output
+        assert '"ok": true' 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")
+
+
+if __name__ == "__main__":
+    main_test()