修复CDN URL和路径构建逻辑

- 修复CDN URL构建，正确处理路径重复问题
- 修复rclone路径构建，使用正确的格式: {rclone_remote}:{storage_path}/{version_path}/{filename}
- 修复CDN路径构建，使用正确的格式: {cdn_base_url}/{version_path}/{filename}
- 修复CDN内容解密处理，支持加密和解密后的内容
- 添加路径构建测试示例
- 完善错误处理和空内容处理

config-man.json

@@ -0,0 +1,25 @@
+{
+  "storage": {
+    "path": "n3ft/ab",
+    "rclone_remote": "ft",
+    "timeout": 30
+  },
+  "cdn": {
+    "base_url": "https://ab.bamboogames.cc/ab",
+    "timeout": 10,
+    "retry_count": 3
+  },
+  "crypto": {
+    "algorithm": "DES",
+    "key": "tbambooz"
+  },
+  "logging": {
+    "level": "INFO",
+    "format": "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+  },
+  "display": {
+    "table_format": "grid",
+    "max_width": 100,
+    "truncate_length": 25
+  }
+}