feat: 视频预览/数据看板/下载配置 三项业务功能

- 新增视频预览：VideoPlayer 组件、VideoController/DyCollectVideoService/Repository、VideoPageRequestDTO 对应后端改动
- 新增数据看板：workplace/statics.vue、RecordTable、相关 store/http/axios 改动
- 新增下载配置：DownloadConfigService、ConfigController、AppSet.vue、AppConfig
- 其他：DyHttpClientService / 同步 Job(Collect, Favorit) / Cookie 表 / CommonService / ServiceExtension 的配套调整
- 仓库卫生：.gitignore 追加 feiniu 过滤；运维脚本归档到 docs/scripts/

docs/scripts/检查数据库数据.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""检查数据库中的视频数据"""
+
+import sqlite3
+import os
+from pathlib import Path
+
+db_path = "/Users/gaotu/WebstormProjects/dysync.net/db/dy.sqlite"
+
+if not os.path.exists(db_path):
+    print(f"❌ 数据库文件不存在: {db_path}")
+    exit(1)
+
+conn = sqlite3.connect(db_path)
+cursor = conn.cursor()
+
+print("=" * 60)
+print("数据库检查报告")
+print("=" * 60)
+
+# 1. 视频总数
+cursor.execute("SELECT COUNT(*) FROM dy_collect_video")
+total = cursor.fetchone()[0]
+print(f"\n1. 视频记录总数: {total}")
+
+# 2. 有保存路径的视频数量
+cursor.execute("SELECT COUNT(*) FROM dy_collect_video WHERE videoSavePath IS NOT NULL AND videoSavePath != ''")
+with_path = cursor.fetchone()[0]
+print(f"2. 有保存路径的视频数量: {with_path}")
+
+# 3. 按类型统计
+cursor.execute("SELECT ViedoType, COUNT(*) FROM dy_collect_video GROUP BY ViedoType")
+type_stats = cursor.fetchall()
+print(f"\n3. 按类型统计:")
+for vtype, count in type_stats:
+    type_name = {"1": "喜欢的", "2": "收藏的", "3": "关注的"}.get(str(vtype), f"未知({vtype})")
+    print(f"   {type_name}: {count}")
+
+# 4. 文件大小统计
+cursor.execute("SELECT SUM(fileSize) FROM dy_collect_video WHERE fileSize > 0")
+total_size = cursor.fetchone()[0] or 0
+print(f"\n4. 总文件大小: {total_size / (1024**3):.2f} GB")
+
+# 5. 最近的视频记录
+print(f"\n5. 最近的视频记录（前5条）:")
+cursor.execute("""
+    SELECT id, videoTitle, author, videoSavePath, fileSize, syncTime 
+    FROM dy_collect_video 
+    ORDER BY syncTime DESC 
+    LIMIT 5
+""")
+records = cursor.fetchall()
+if records:
+    for idx, (vid, title, author, path, size, sync_time) in enumerate(records, 1):
+        title_short = (title[:30] + "...") if title and len(title) > 30 else (title or "无标题")
+        size_mb = (size / (1024**2)) if size else 0
+        file_exists = "✅" if path and os.path.exists(path) else "❌"
+        print(f"   {idx}. [{file_exists}] {title_short}")
+        print(f"      作者: {author}, 大小: {size_mb:.2f} MB")
+        if path:
+            print(f"      路径: {path}")
+else:
+    print("   (无记录)")
+
+# 6. 检查文件是否存在
+print(f"\n6. 文件存在性检查:")
+cursor.execute("SELECT videoSavePath FROM dy_collect_video WHERE videoSavePath IS NOT NULL AND videoSavePath != '' LIMIT 10")
+paths = cursor.fetchall()
+if paths:
+    exists_count = 0
+    for (path,) in paths:
+        if path and os.path.exists(path):
+            exists_count += 1
+    print(f"   检查了 {len(paths)} 个路径，{exists_count} 个文件存在")
+else:
+    print("   (无路径记录)")
+
+conn.close()
+print("\n" + "=" * 60)
+