feat: LLM 设置窗口添加「从另一个配置复制」按钮

Sources/UI/SettingsWindow.swift

@@ -9,6 +9,7 @@ final class SettingsWindow: NSWindow {
     private let modelField: NSTextField
     private let testButton: NSButton
     private let saveButton: NSButton
+    private let copyFromOtherButton: NSButton
     private let statusLabel: NSTextField
 
     init(mode: LLMMode) {
@@ -19,9 +20,10 @@ final class SettingsWindow: NSWindow {
         modelField = NSTextField(frame: .zero)
         testButton = NSButton(title: "Test", target: nil, action: nil)
         saveButton = NSButton(title: "Save", target: nil, action: nil)
+        copyFromOtherButton = NSButton(title: "", target: nil, action: nil)
         statusLabel = NSTextField(labelWithString: "")
 
-        let windowRect = NSRect(x: 0, y: 0, width: 420, height: 280)
+        let windowRect = NSRect(x: 0, y: 0, width: 420, height: 320)
         super.init(
             contentRect: windowRect,
             styleMask: [.titled, .closable, .miniaturizable],
@@ -111,6 +113,13 @@ final class SettingsWindow: NSWindow {
         saveButton.target = self
         saveButton.action = #selector(saveConfig)
 
+        let otherModeName = mode == .input ? "AI 助手" : "语音输入"
+        copyFromOtherButton.title = "从「\(otherModeName)」复制配置"
+        copyFromOtherButton.bezelStyle = .rounded
+        copyFromOtherButton.translatesAutoresizingMaskIntoConstraints = false
+        copyFromOtherButton.target = self
+        copyFromOtherButton.action = #selector(copyFromOther)
+
         statusLabel.font = .systemFont(ofSize: 11)
         statusLabel.textColor = .secondaryLabelColor
         statusLabel.alignment = .center
@@ -136,6 +145,7 @@ final class SettingsWindow: NSWindow {
 
         content.addSubview(grid)
         content.addSubview(buttonStack)
+        content.addSubview(copyFromOtherButton)
         content.addSubview(statusLabel)
 
         NSLayoutConstraint.activate([
@@ -147,7 +157,10 @@ final class SettingsWindow: NSWindow {
             buttonStack.centerXAnchor.constraint(equalTo: content.centerXAnchor),
             buttonStack.widthAnchor.constraint(equalToConstant: 220),
 
-            statusLabel.topAnchor.constraint(equalTo: buttonStack.bottomAnchor, constant: 12),
+            copyFromOtherButton.topAnchor.constraint(equalTo: buttonStack.bottomAnchor, constant: 10),
+            copyFromOtherButton.centerXAnchor.constraint(equalTo: content.centerXAnchor),
+
+            statusLabel.topAnchor.constraint(equalTo: copyFromOtherButton.bottomAnchor, constant: 10),
             statusLabel.centerXAnchor.constraint(equalTo: content.centerXAnchor),
             statusLabel.widthAnchor.constraint(equalToConstant: 380)
         ])
@@ -194,6 +207,19 @@ final class SettingsWindow: NSWindow {
         }
     }
 
+    @objc private func copyFromOther() {
+        let otherMode: LLMMode = mode == .input ? .assist : .input
+        let config = Config.shared.getLLMConfig(for: otherMode)
+        baseURLField.stringValue = config.baseURL
+        apiKeyField.stringValue = config.apiKey
+        modelField.stringValue = config.model
+        statusLabel.stringValue = "✅ 已复制「\(otherMode == .input ? "语音输入" : "AI 助手")」的配置"
+        statusLabel.textColor = .systemGreen
+        DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) { [weak self] in
+            self?.statusLabel.stringValue = ""
+        }
+    }
+
     @objc private func saveConfig() {
         let url = baseURLField.stringValue.trimmingCharacters(in: CharacterSet(charactersIn: "/"))
         let key = apiKeyField.stringValue