fix: 修复签名不匹配的根本原因，改用手动拼接 URL 替代 URLComponents，增加加载重试机制

apps/macos/VODManager/Sources/VODManager/Services/VODClient.swift

@@ -66,15 +66,12 @@ actor VODClient {
         params["Signature"] = signature
 
         let host = endpoint()
-        var components = URLComponents()
+        let query = params.sorted(by: { $0.key < $1.key })
-        components.scheme = "https"
+            .map { "\(VODSignature.percentEncodePublic($0.key))=\(VODSignature.percentEncodePublic($0.value))" }
-        components.host = host
+            .joined(separator: "&")
-        components.path = "/"
+        let urlString = "https://\(host)/?\(query)"
-        components.queryItems = params.sorted(by: { $0.key < $1.key }).map {
-            URLQueryItem(name: $0.key, value: $0.value)
-        }
 
-        guard let url = components.url else {
+        guard let url = URL(string: urlString) else {
             throw VODClientError.invalidResponse
         }
         return url
@@ -93,7 +90,17 @@ actor VODClient {
         }
 
         let decoder = JSONDecoder()
+        do {
             return try decoder.decode(T.self, from: data)
+        } catch {
+            if action == "GetPlayInfo" {
+                print("[VODClient] GetPlayInfo 解码失败: \(error)")
+                if let raw = String(data: data, encoding: .utf8) {
+                    print("[VODClient] GetPlayInfo 原始响应: \(raw)")
+                }
+            }
+            throw error
+        }
     }
 
     func searchMedia(

apps/macos/VODManager/Sources/VODManager/Services/VODSignature.swift

@@ -26,8 +26,6 @@ struct VODSignature {
 
         let stringToSign = "\(method)&%2F&\(percentEncode(canonicalQuery))"
 
-        print("[VODSignature] stringToSign: \(stringToSign)")
-
         guard let keyData = "\(accessKeySecret)&".data(using: .utf8) else {
             throw VODSignatureError.invalidKey
         }
@@ -41,6 +39,10 @@ struct VODSignature {
         return signatureData.base64EncodedString()
     }
 
+    static func percentEncodePublic(_ value: String) -> String {
+        percentEncode(value)
+    }
+
     private static func percentEncode(_ value: String) -> String {
         let allowed = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.~"
         var result = ""

apps/macos/VODManager/Sources/VODManager/Views/VideoListView.swift

@@ -243,7 +243,9 @@ struct VideoListView: View {
     private func refreshFromAPI() async {
         isLoading = true
         errorMessage = nil
-        loadingStatus = "正在加载视频列表..."
+        let maxRetries = 3
+        for attempt in 1...maxRetries {
+            loadingStatus = attempt == 1 ? "正在加载视频列表..." : "重试中... (第 \(attempt)/\(maxRetries) 次)"
             var collected: [VideoItem] = []
             var page = 1
             let size = 100
@@ -262,12 +264,21 @@ struct VideoListView: View {
                         break
                     }
                     page += 1
+                    try? await Task.sleep(for: .milliseconds(200))
                 }
                 allVideos = collected
                 applyFilter()
                 loadingStatus = ""
+                isLoading = false
+                return
             } catch {
-            errorMessage = "加载失败：\(error.localizedDescription)"
+                if attempt < maxRetries {
+                    let delay = UInt64(attempt) * 1_000_000_000
+                    try? await Task.sleep(nanoseconds: delay)
+                } else {
+                    errorMessage = "加载失败（已重试 \(maxRetries) 次）：\(error.localizedDescription)"
+                }
+            }
         }
         isLoading = false
     }