feat: 新增多项功能并添加新工具

- 私人剪贴板新增限时直通URL生成功能
- doc_cloud_keeper新增标题复制按钮
- 新增贪蛇出动游戏工具
- 新增OSS中转直链工具
- 添加批量抽帧测试脚本

dev_test_scripts/tools/tool_extract_snake_frames.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+"""
+tool_extract_snake_frames.py
+从「贪蛇出动」游戏录屏视频中抽帧，用于分析玩法与抠素材。
+用法:
+  python tool_extract_snake_frames.py                # 默认每 2 秒抽 1 帧
+  python tool_extract_snake_frames.py 0.5            # 每 0.5 秒抽 1 帧
+  python tool_extract_snake_frames.py 0.2 60 70      # 每 0.2 秒抽 1 帧，只抽 60~70 秒区间
+"""
+import os
+import sys
+import cv2
+
+VIDEO = r"D:\Trae_Files\TRAE-Toolbox\temp\a4ef87cf84a3152cb5800eae5e06e6a8.mp4"
+OUT_DIR = r"D:\Trae_Files\TRAE-Toolbox\temp\snake_frames"
+
+
+def main():
+    step = float(sys.argv[1]) if len(sys.argv) > 1 else 2.0
+    start = float(sys.argv[2]) if len(sys.argv) > 2 else 0.0
+    end = float(sys.argv[3]) if len(sys.argv) > 3 else 1e18
+
+    os.makedirs(OUT_DIR, exist_ok=True)
+    cap = cv2.VideoCapture(VIDEO)
+    if not cap.isOpened():
+        print("无法打开视频:", VIDEO)
+        sys.exit(1)
+    fps = cap.get(cv2.CAP_PROP_FPS) or 30.0
+    total = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
+    print(f"fps={fps:.2f} total_frames={total} duration={total / fps:.1f}s step={step}s")
+
+    t = start
+    saved = 0
+    while t <= end:
+        cap.set(cv2.CAP_PROP_POS_MSEC, t * 1000.0)
+        ok, frame = cap.read()
+        if not ok:
+            break
+        name = "t%07d.jpg" % int(round(t * 10))  # 文件名单位：0.1 秒
+        cv2.imwrite(os.path.join(OUT_DIR, name), frame, [cv2.IMWRITE_JPEG_QUALITY, 88])
+        saved += 1
+        t += step
+    cap.release()
+    print(f"saved={saved} -> {OUT_DIR}")
+
+
+if __name__ == "__main__":
+    main()