optimize the appicon of iOS

ios/OralTrainer/Services/ImitationAssessor.swift

@@ -15,6 +15,13 @@ enum ImitationAssessorError: LocalizedError {
     }
 }
 
+struct DubShareUploadRequest {
+    let videoHash: String
+    let title: String
+    let segments: [(index: Int, audioURL: URL)]
+    let scores: [Int: ImitationAssessmentResult]
+}
+
 enum ImitationAssessor {
     /// 分块计算文件的 SHA-256（与安卓端一致，适合大视频文件）。
     static func sha256Hex(of fileURL: URL) throws -> String {
@@ -100,6 +107,96 @@ enum ImitationAssessor {
         return try JSONDecoder().decode(ImitationAssessmentResult.self, from: result.body)
     }
 
+    static func uploadDubShare(request: DubShareUploadRequest) async throws -> String {
+        let hash = request.videoHash.lowercased()
+        guard hash.range(of: AppConfig.sha256Pattern, options: .regularExpression) != nil else {
+            throw ImitationAssessorError.invalidHash
+        }
+        guard !request.segments.isEmpty else {
+            throw ImitationAssessorError.cannotReadRecording
+        }
+
+        let boundary = "----OralTrainer-\(UUID().uuidString)"
+        var body = Data()
+        appendField(&body, boundary: boundary, name: "video_hash", value: hash)
+        appendField(&body, boundary: boundary, name: "title", value: request.title.isEmpty ? "我的口语配音" : request.title)
+
+        let segmentItems = request.segments
+            .sorted { $0.index < $1.index }
+            .map { "{\"sentence_index\":\($0.index)}" }
+        appendField(&body, boundary: boundary, name: "segments", value: "[\(segmentItems.joined(separator: ","))]")
+
+        let scoreItems = request.segments
+            .sorted { $0.index < $1.index }
+            .compactMap { segment -> String? in
+                guard let score = request.scores[segment.index] else { return nil }
+                var fields = ["\"sentence_index\":\(segment.index)"]
+                for (key, value) in [
+                    ("overall_score", score.overallScore as Float?),
+                    ("content_score", score.contentScore),
+                    ("fluency_score", score.fluencyScore),
+                    ("duration_score", score.durationScore),
+                    ("pause_score", score.pauseScore),
+                    ("speech_rate_score", score.speechRateScore),
+                ] {
+                    if let value = value {
+                        fields.append("\"\(key)\":\(value)")
+                    }
+                }
+                if let text = score.recognizedText {
+                    let escaped = text
+                        .replacingOccurrences(of: "\\", with: "\\\\")
+                        .replacingOccurrences(of: "\"", with: "\\\"")
+                    fields.append("\"recognized_text\":\"\(escaped)\"")
+                }
+                return "{\(fields.joined(separator: ","))}"
+            }
+        appendField(&body, boundary: boundary, name: "scores", value: "[\(scoreItems.joined(separator: ","))]")
+
+        for segment in request.segments.sorted(by: { $0.index < $1.index }) {
+            let audioData: Data
+            do {
+                audioData = try Data(contentsOf: segment.audioURL)
+            } catch {
+                throw ImitationAssessorError.cannotReadRecording
+            }
+            appendFile(
+                &body,
+                boundary: boundary,
+                name: "files",
+                filename: "dub-\(segment.index).m4a",
+                mimeType: "audio/mp4",
+                data: audioData
+            )
+        }
+        body.append(Data("--\(boundary)--\r\n".utf8))
+
+        let result = try await HTTPClient.execute(
+            baseURL: AppConfig.serverBaseURL,
+            path: "api/v1/dub-shares",
+            method: "POST",
+            timeout: 120,
+            headers: [
+                "Accept": "application/json",
+                "Content-Type": "multipart/form-data; boundary=\(boundary)",
+            ],
+            body: body
+        )
+        guard (200...299).contains(result.statusCode) else {
+            let responseBody = String(data: result.body, encoding: .utf8) ?? ""
+            throw HTTPClientError.badStatus(result.statusCode, responseBody)
+        }
+        struct ShareResponse: Decodable {
+            let shareId: String
+            private enum CodingKeys: String, CodingKey {
+                case shareId = "share_id"
+            }
+        }
+        let response = try JSONDecoder().decode(ShareResponse.self, from: result.body)
+        let base = AppConfig.serverBaseURL.trimmingCharacters(in: CharacterSet(charactersIn: "/"))
+        return "\(base)/dub-shares/\(response.shareId)"
+    }
+
     private static func appendField(_ body: inout Data, boundary: String, name: String, value: String) {
         body.append(Data("--\(boundary)\r\n".utf8))
         body.append(Data("Content-Disposition: form-data; name=\"\(name)\"\r\n\r\n".utf8))