Fix model switching not reinitializing recognizers

The switchModel function compared the new model with currentModel,
but currentModel reads from UserDefaults which was already updated
by SettingsView. This caused the guard to always return early,
skipping recognizer initialization.

Now switchModel always reinitializes recognizers when called.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ZhaoChaoqun

.gitignore

@@ -43,3 +43,4 @@ promo-video/out/
 
 # FunASR CoreML conversion scripts (contains large model files)
 funasr-coreml/
+.cache/

Sources/RecordingManager.swift

@@ -40,8 +40,8 @@ class RecordingManager {
 
     /// 切换 ASR 模型
     func switchModel(to model: ASRModelType) async {
-        guard model != currentModel else { return }
-        currentModel = model
+        // 注意：不能用 currentModel 比较，因为 SettingsView 已经更新了 UserDefaults
+        // 直接重新初始化识别器
         await initializeRecognizer()
     }