feat(p3): add discovery, telegram notifications, and one-click favorites

Implement WBI video search with legacy fallback, classification scoring, candidate pool, permanent seen-aid dedupe, blacklist filtering, and batched Telegram notifications. Add write client for fav deal/sort, target-folder selection, insertion position calculation, read-back verification, fav_action locking, retry on failure, ignore and blacklist actions. Wire discovery, candidate cleanup, Telegram long polling, and new discover/candidates CLI commands into the scheduler. Add migration v3 for candidate duration and index stats.

tests/test_cli.py

@@ -51,7 +51,7 @@ def test_init_and_status():
         path = write_config(tmp)
         code, output = run_cli(["init", "--config", str(path)])
         assert code == 0
-        assert '"schema_version": 2' in output
+        assert '"schema_version": 3' in output
 
         db = Database(Path(tmp) / "app.db")
         db.initialize()
@@ -149,6 +149,14 @@ def test_run_once_offline():
         def check_login(self):
             return LoginState(True, 1, "tester", 0, "OK")
 
+    class FakeDiscovery:
+        def __init__(self, *args, **kwargs):
+            pass
+
+        def run(self):
+            from reaction_board.services.discovery import DiscoverySummary
+            return DiscoverySummary(started_at=1, finished_at=1)
+
     with tempfile.TemporaryDirectory() as tmp:
         path = write_config(tmp)
         data = json.loads(path.read_text(encoding="utf-8"))
@@ -157,6 +165,7 @@ def test_run_once_offline():
         path.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
 
         original = cli._client
+        original_discovery = cli.DiscoveryService
         selected = []
 
         def fake_client(credentials, *args, **kwargs):
@@ -164,10 +173,12 @@ def test_run_once_offline():
             return FakeClient()
 
         cli._client = fake_client
+        cli.DiscoveryService = FakeDiscovery
         try:
             code, output = run_cli(["run", "--once", "--config", str(path)])
         finally:
             cli._client = original
+            cli.DiscoveryService = original_discovery
         assert code == 0
         assert '"name": "folder_sync"' in output
         assert '"name": "snapshot"' in output
@@ -209,6 +220,49 @@ def test_snapshot_backup_failure_returns_error_and_retries():
         assert Path(payload["backup_path"]).exists()
 
 
+def test_candidates_and_discover_commands():
+    from reaction_board.services.discovery import DiscoverySummary
+
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp)
+        assert run_cli(["init", "--config", str(path)])[0] == 0
+        db = Database(Path(tmp) / "app.db")
+        db.initialize()
+        try:
+            repo = Repository(db)
+            repo.upsert_candidate(
+                aid=123, bvid="BV123", title="咻咻满 reaction",
+                up_mid=100, up_name="UP", pubdate=1,
+                cover=None, score=3, channel="search:test#p1",
+            )
+        finally:
+            db.close()
+
+        code, output = run_cli(["candidates", "--config", str(path)])
+        assert code == 0
+        assert '"count": 1' in output
+        assert '"aid": 123' in output
+
+        class FakeDiscovery:
+            def __init__(self, *args, **kwargs):
+                pass
+
+            def run(self):
+                return DiscoverySummary(
+                    started_at=1, finished_at=2, candidates=3, notified=1
+                )
+
+        original = cli.DiscoveryService
+        cli.DiscoveryService = FakeDiscovery
+        try:
+            code, output = run_cli(["discover", "--config", str(path)])
+        finally:
+            cli.DiscoveryService = original
+        assert code == 0
+        assert '"candidates": 3' in output
+        assert '"notified": 1' in output
+
+
 def main_test():
     test_init_and_status()
     test_missing_config()
@@ -218,6 +272,7 @@ def main_test():
     test_auth_check_all_and_auth_dispatch()
     test_run_once_offline()
     test_snapshot_backup_failure_returns_error_and_retries()
+    test_candidates_and_discover_commands()
     print("OK: CLI init/sync/snapshot/auth-check/run/status/错误路径测试全部通过")