Add language selection and DMG packaging

.gitignore

@@ -95,6 +95,7 @@ Temporary Items
 *.swp
 *.lock
 *.log
+dist/
 
 # Snippets
 snippets/

BetterCapture/Model/AppLanguage.swift

@@ -0,0 +1,40 @@
+//
+//  AppLanguage.swift
+//  BetterCapture
+//
+//  Created by Codex on 30.05.26.
+//
+
+import Foundation
+
+enum AppLanguage: String, CaseIterable, Identifiable {
+    case english
+    case simplifiedChinese
+
+    var id: String { rawValue }
+
+    static var current: AppLanguage {
+        let rawValue = UserDefaults.standard.string(forKey: "appLanguage") ?? AppLanguage.english.rawValue
+        return AppLanguage(rawValue: rawValue) ?? .english
+    }
+
+    var displayName: String {
+        switch self {
+        case .english:
+            return "English"
+        case .simplifiedChinese:
+            return "简体中文"
+        }
+    }
+}
+
+enum AppText {
+    static func value(_ english: String, _ simplifiedChinese: String, language: AppLanguage) -> String {
+        switch language {
+        case .english:
+            return english
+        case .simplifiedChinese:
+            return simplifiedChinese
+        }
+    }
+}

BetterCapture/Model/ContentSelectionMode.swift

@@ -22,9 +22,15 @@ enum ContentSelectionMode: String {
     case selectArea
 
     var label: String {
+        label(language: .english)
+    }
+
+    func label(language: AppLanguage) -> String {
         switch self {
-        case .pickContent: "Pick Content"
-        case .selectArea: "Select Area"
+        case .pickContent:
+            AppText.value("Pick Content", "选择内容", language: language)
+        case .selectArea:
+            AppText.value("Select Area", "选择区域", language: language)
         }
     }
 

BetterCapture/Model/SettingsStore.swift

@@ -152,9 +152,13 @@ enum FrameRate: Int, CaseIterable, Identifiable {
     var id: Int { rawValue }
 
     var displayName: String {
+        displayName(language: .english)
+    }
+
+    func displayName(language: AppLanguage) -> String {
         switch self {
         case .native:
-            return "Native"
+            return AppText.value("Native", "原生", language: language)
         default:
             return "\(rawValue) fps"
         }
@@ -187,6 +191,21 @@ enum VideoQuality: String, CaseIterable, Identifiable {
 
     var id: String { rawValue }
 
+    var displayName: String {
+        displayName(language: .english)
+    }
+
+    func displayName(language: AppLanguage) -> String {
+        switch self {
+        case .low:
+            return AppText.value("Low", "低", language: language)
+        case .medium:
+            return AppText.value("Medium", "中", language: language)
+        case .high:
+            return AppText.value("High", "高", language: language)
+        }
+    }
+
     /// Bits-per-pixel multiplier for H.264
     var h264BitsPerPixel: Double {
         switch self {
@@ -249,6 +268,21 @@ final class SettingsStore {
         self.defaults = defaults
     }
 
+    // MARK: - General Settings
+
+    var appLanguage: AppLanguage {
+        get {
+            access(keyPath: \.appLanguage)
+            let rawValue = defaults.string(forKey: "appLanguage") ?? AppLanguage.english.rawValue
+            return AppLanguage(rawValue: rawValue) ?? .english
+        }
+        set {
+            withMutation(keyPath: \.appLanguage) {
+                defaults.set(newValue.rawValue, forKey: "appLanguage")
+            }
+        }
+    }
+
     // MARK: - Video Settings
 
     var frameRate: FrameRate {

BetterCapture/Service/AssetWriter.swift

@@ -576,17 +576,29 @@ enum AssetWriterError: LocalizedError {
     var errorDescription: String? {
         switch self {
         case .failedToCreateWriter:
-            return "Failed to create the asset writer."
+            return AppText.value("Failed to create the asset writer.", "创建媒体写入器失败。", language: .current)
         case .writerNotReady:
-            return "The asset writer is not ready for writing."
+            return AppText.value("The asset writer is not ready for writing.", "媒体写入器尚未准备好写入。", language: .current)
         case .failedToStartWriting(let error):
-            return "Failed to start writing: \(error?.localizedDescription ?? "Unknown error")"
+            return AppText.value(
+                "Failed to start writing: \(error?.localizedDescription ?? "Unknown error")",
+                "开始写入失败：\(error?.localizedDescription ?? "未知错误")",
+                language: .current
+            )
         case .writingFailed(let error):
-            return "Writing failed: \(error?.localizedDescription ?? "Unknown error")"
+            return AppText.value(
+                "Writing failed: \(error?.localizedDescription ?? "Unknown error")",
+                "写入失败：\(error?.localizedDescription ?? "未知错误")",
+                language: .current
+            )
         case .noOutputURL:
-            return "No output URL was configured."
+            return AppText.value("No output URL was configured.", "未配置输出位置。", language: .current)
         case .noFramesWritten:
-            return "No video frames were captured. Check screen recording permissions."
+            return AppText.value(
+                "No video frames were captured. Check screen recording permissions.",
+                "没有捕捉到视频帧。请检查屏幕录制权限。",
+                language: .current
+            )
         }
     }
 }

BetterCapture/Service/CaptureEngine.swift

@@ -376,15 +376,27 @@ enum CaptureError: LocalizedError {
     var errorDescription: String? {
         switch self {
         case .noContentFilterSelected:
-            return "No content has been selected for capture. Please use the picker to select a window or display."
+            return AppText.value(
+                "No content has been selected for capture. Please use the picker to select a window or display.",
+                "尚未选择录制内容。请使用选择器选择窗口或显示器。",
+                language: .current
+            )
         case .failedToCreateStream:
-            return "Failed to create the capture stream."
+            return AppText.value("Failed to create the capture stream.", "创建录制流失败。", language: .current)
         case .captureAlreadyRunning:
-            return "A capture session is already in progress."
+            return AppText.value("A capture session is already in progress.", "录制会话已在进行中。", language: .current)
         case .screenRecordingPermissionDenied:
-            return "Screen recording permission is required. Please grant permission in System Settings → Privacy & Security → Screen Recording."
+            return AppText.value(
+                "Screen recording permission is required. Please grant permission in System Settings > Privacy & Security > Screen Recording.",
+                "需要屏幕录制权限。请在“系统设置”>“隐私与安全性”>“屏幕录制”中授予权限。",
+                language: .current
+            )
         case .microphonePermissionDenied:
-            return "Microphone permission is required. Please grant permission in System Settings → Privacy & Security → Microphone."
+            return AppText.value(
+                "Microphone permission is required. Please grant permission in System Settings > Privacy & Security > Microphone.",
+                "需要麦克风权限。请在“系统设置”>“隐私与安全性”>“麦克风”中授予权限。",
+                language: .current
+            )
         }
     }
 }

BetterCapture/Service/NotificationService.swift

@@ -55,7 +55,7 @@ final class NotificationService: NSObject {
         // Action to show recording in Finder
         let showInFinderAction = UNNotificationAction(
             identifier: NotificationIdentifier.actionShowInFinder,
-            title: "Show in Finder",
+            title: AppText.value("Show in Finder", "在访达中显示", language: .current),
             options: [.foreground]
         )
 
@@ -100,9 +100,15 @@ final class NotificationService: NSObject {
     /// Sends a notification for a successfully saved recording
     /// - Parameter fileURL: The URL of the saved recording file
     func sendRecordingSavedNotification(fileURL: URL) {
+        registerNotificationCategories()
+        let language = settings.appLanguage
         let content = UNMutableNotificationContent()
-        content.title = "Recording Saved"
-        content.body = "Your recording has been saved to \(fileURL.lastPathComponent)"
+        content.title = AppText.value("Recording Saved", "录制已保存", language: language)
+        content.body = AppText.value(
+            "Your recording has been saved to \(fileURL.lastPathComponent)",
+            "录制文件已保存到 \(fileURL.lastPathComponent)",
+            language: language
+        )
         content.sound = .default
         content.categoryIdentifier = NotificationIdentifier.categoryRecordingSaved
 
@@ -129,9 +135,15 @@ final class NotificationService: NSObject {
     /// Sends a notification for a failed recording
     /// - Parameter error: The error that caused the recording to fail
     func sendRecordingFailedNotification(error: Error) {
+        registerNotificationCategories()
+        let language = settings.appLanguage
         let content = UNMutableNotificationContent()
-        content.title = "Recording Failed"
-        content.body = "Your recording could not be saved: \(error.localizedDescription)"
+        content.title = AppText.value("Recording Failed", "录制失败", language: language)
+        content.body = AppText.value(
+            "Your recording could not be saved: \(error.localizedDescription)",
+            "无法保存录制文件：\(error.localizedDescription)",
+            language: language
+        )
         content.sound = .default
         content.categoryIdentifier = NotificationIdentifier.categoryRecordingFailed
 
@@ -154,13 +166,19 @@ final class NotificationService: NSObject {
     /// Sends a notification when recording stopped unexpectedly
     /// - Parameter error: Optional error that caused the stop
     func sendRecordingStoppedNotification(error: Error?) {
+        registerNotificationCategories()
+        let language = settings.appLanguage
         let content = UNMutableNotificationContent()
-        content.title = "Recording Stopped"
+        content.title = AppText.value("Recording Stopped", "录制已停止", language: language)
 
         if let error {
-            content.body = "Recording stopped unexpectedly: \(error.localizedDescription)"
+            content.body = AppText.value(
+                "Recording stopped unexpectedly: \(error.localizedDescription)",
+                "录制意外停止：\(error.localizedDescription)",
+                language: language
+            )
         } else {
-            content.body = "Recording stopped unexpectedly"
+            content.body = AppText.value("Recording stopped unexpectedly", "录制意外停止", language: language)
         }
 
         content.sound = .default

BetterCapture/View/AreaSelectionOverlay.swift

@@ -484,13 +484,13 @@ final class AreaSelectionView: NSView {
         let container = NSView()
 
         let confirm = makeActionButton(
-            title: "Confirm",
+            title: AppText.value("Confirm", "确认", language: .current),
             textColor: .systemGreen,
             action: #selector(confirmButtonClicked)
         )
 
         let cancel = makeActionButton(
-            title: "Cancel",
+            title: AppText.value("Cancel", "取消", language: .current),
             textColor: .systemRed,
             action: #selector(cancelButtonClicked)
         )