fix(web): align trend ranges, next runs and preview task records

tests/test_cli.py

@@ -194,6 +194,34 @@ def test_run_once_offline():
             db.close()
 
 
+def test_serve_preview_guard():
+    with tempfile.TemporaryDirectory() as tmp:
+        path = write_config(tmp)
+        assert run_cli(["init", "--config", str(path)])[0] == 0
+        db_path = Path(tmp) / "app.db"
+        try:
+            cli._assert_preview_database(db_path)
+        except cli.ConfigError as exc:
+            assert "preview:seeded" in str(exc)
+        else:
+            raise AssertionError("普通数据库不应通过 --preview 校验")
+
+        db = Database(db_path)
+        db.initialize()
+        try:
+            Repository(db).kv_set("preview:seeded", "1")
+        finally:
+            db.close()
+        cli._assert_preview_database(db_path)
+
+        try:
+            cli._assert_preview_database(Path(tmp) / "missing.db")
+        except cli.ConfigError as exc:
+            assert "不存在" in str(exc)
+        else:
+            raise AssertionError("缺失数据库应报错")
+
+
 def test_default_command_starts_web_and_scheduler():
     with tempfile.TemporaryDirectory() as tmp:
         path = write_config(tmp)
@@ -299,6 +327,7 @@ def main_test():
     test_auth_check_without_cookie()
     test_auth_check_all_and_auth_dispatch()
     test_run_once_offline()
+    test_serve_preview_guard()
     test_default_command_starts_web_and_scheduler()
     test_snapshot_backup_failure_returns_error_and_retries()
     test_candidates_and_discover_commands()

tests/test_preview_seed.py

@@ -203,6 +203,9 @@ def test_seed_preview_end_to_end():
             assert conn.execute(
                 "SELECT 1 FROM up_blacklist WHERE mid=?", (FAKE_BLACKLIST_MID,)
             ).fetchone() is not None
+            assert conn.execute(
+                "SELECT 1 FROM kv WHERE k='task:last:snapshot'"
+            ).fetchone() is not None
             up_rows = conn.execute(
                 "SELECT stat_date, follower FROM up_stat WHERE mid=37754047 "
                 "ORDER BY stat_date"

tests/test_web_queries.py

@@ -142,6 +142,10 @@ def test_video_detail_and_trend():
             assert trend["available"] is True
             assert len(trend["points"]) == 3
 
+            # 请求区间早于首次快照时，从首次快照开始，不制造空白历史
+            wide = q.video_trend(101, days=30)
+            assert wide["dates"] == list(DATES)
+
             # 删除中间一天，折线在缺失日期应为 None，而不是插值
             db.write(lambda conn: conn.execute(
                 "DELETE FROM snapshot WHERE aid=101 AND stat_date=?",
@@ -204,6 +208,8 @@ def test_fans_candidates_system_and_export():
             assert fans["delta_7d"] is None
             assert fans["delta_cum"] == 20
             assert fans["options"][0]["mid"] == 37754047
+            wide = q.fans(days=30)
+            assert wide["dates"] == list(DATES)
 
             candidates = q.candidates()
             assert candidates["total"] == 2
@@ -220,6 +226,8 @@ def test_fans_candidates_system_and_export():
             assert system["errors"] == []
             assert system["preview"] is False
             assert system["next_runs"]["snapshot"] > 0
+            assert system["next_runs"]["folder_sync"] > FIXED_NOW
+            assert system["next_runs"]["discover"] > FIXED_NOW
 
             exported = q.export_videos(sort="view")
             assert exported["total"] == 3

tests/test_web_server.py

@@ -74,6 +74,13 @@ def test_readonly_routes_and_static():
             assert "text/html" in headers["Content-Type"]
             assert b"<html" in payload.lower()
 
+            for asset in ("/static/style.css", "/static/app.js", "/static/vendor/echarts.min.js"):
+                status, asset_headers, asset_payload = running.request(asset)
+                assert status == 200, asset
+                assert asset_payload, asset
+                content_type = asset_headers["Content-Type"]
+                assert "text/css" in content_type or "javascript" in content_type, asset
+
             status, _, payload = running.request("/static/../config.json")
             assert status == 404