feat: enhance Whisper model selection with detailed information including disk/memory usage and transcription quality.

lib/core/constants.dart

@@ -1,17 +1,64 @@
+import 'package:caption_trans/l10n/app_localizations.dart';
+
+/// Information about a Whisper model.
+class WhisperModelInfo {
+  final String name;
+  final String diskUsage;
+  final String memoryUsage;
+  final String Function(AppLocalizations) quality;
+
+  const WhisperModelInfo({
+    required this.name,
+    required this.diskUsage,
+    required this.memoryUsage,
+    required this.quality,
+  });
+}
+
 /// Application-wide constants.
 class AppConstants {
   AppConstants._();
 
   static const String appName = 'Caption Trans';
 
-  /// Supported Whisper models with their approximate sizes.
-  static const Map<String, String> whisperModels = {
-    'tiny': 'Tiny (~75 MB)',
-    'base': 'Base (~148 MB)',
-    'small': 'Small (~488 MB)',
-    'medium': 'Medium (~1.5 GB)',
-    'large-v3': 'Large V3 (~3 GB)',
-    'large-v3-turbo': 'Large V3 Turbo (~1.6 GB)',
+  /// Supported Whisper models with detailed information.
+  static final Map<String, WhisperModelInfo> whisperModels = {
+    'tiny': WhisperModelInfo(
+      name: 'tiny',
+      diskUsage: '~75 MB',
+      memoryUsage: '~273 MB',
+      quality: (l) => l.qualityLow,
+    ),
+    'base': WhisperModelInfo(
+      name: 'base',
+      diskUsage: '~142 MB',
+      memoryUsage: '~388 MB',
+      quality: (l) => l.qualityBasic,
+    ),
+    'small': WhisperModelInfo(
+      name: 'small',
+      diskUsage: '~466 MB',
+      memoryUsage: '~852 MB',
+      quality: (l) => l.qualityGood,
+    ),
+    'medium': WhisperModelInfo(
+      name: 'medium',
+      diskUsage: '~1.5 GB',
+      memoryUsage: '~2.1 GB',
+      quality: (l) => l.qualityExcellent,
+    ),
+    'large-v3-turbo': WhisperModelInfo(
+      name: 'large-v3-turbo',
+      diskUsage: '~1.5 GB',
+      memoryUsage: '~2.0 GB',
+      quality: (l) => l.qualitySuperior,
+    ),
+    'large': WhisperModelInfo(
+      name: 'large',
+      diskUsage: '~2.9 GB',
+      memoryUsage: '~3.9 GB',
+      quality: (l) => l.qualityBest,
+    ),
   };
 
   static const String defaultWhisperModel = 'base';

lib/l10n/app_en.arb

@@ -14,6 +14,15 @@
   "clear": "Clear",
   "stepExtractSubtitles": "Extract Subtitles",
   "whisperModel": "Whisper Model",
+  "diskUsage": "Disk Usage",
+  "memoryUsage": "Memory/VRAM Usage",
+  "transcriptionQuality": "Transcription Quality",
+  "qualityLow": "Low",
+  "qualityBasic": "Basic",
+  "qualityGood": "Good",
+  "qualityExcellent": "Excellent",
+  "qualitySuperior": "Superior (Recommended)",
+  "qualityBest": "Best",
   "extract": "Extract",
   "downloadingModel": "Downloading model {name}...",
   "@downloadingModel": {

lib/l10n/app_localizations.dart

@@ -182,6 +182,60 @@ abstract class AppLocalizations {
   /// **'Whisper Model'**
   String get whisperModel;
 
+  /// No description provided for @diskUsage.
+  ///
+  /// In en, this message translates to:
+  /// **'Disk Usage'**
+  String get diskUsage;
+
+  /// No description provided for @memoryUsage.
+  ///
+  /// In en, this message translates to:
+  /// **'Memory/VRAM Usage'**
+  String get memoryUsage;
+
+  /// No description provided for @transcriptionQuality.
+  ///
+  /// In en, this message translates to:
+  /// **'Transcription Quality'**
+  String get transcriptionQuality;
+
+  /// No description provided for @qualityLow.
+  ///
+  /// In en, this message translates to:
+  /// **'Low'**
+  String get qualityLow;
+
+  /// No description provided for @qualityBasic.
+  ///
+  /// In en, this message translates to:
+  /// **'Basic'**
+  String get qualityBasic;
+
+  /// No description provided for @qualityGood.
+  ///
+  /// In en, this message translates to:
+  /// **'Good'**
+  String get qualityGood;
+
+  /// No description provided for @qualityExcellent.
+  ///
+  /// In en, this message translates to:
+  /// **'Excellent'**
+  String get qualityExcellent;
+
+  /// No description provided for @qualitySuperior.
+  ///
+  /// In en, this message translates to:
+  /// **'Superior (Recommended)'**
+  String get qualitySuperior;
+
+  /// No description provided for @qualityBest.
+  ///
+  /// In en, this message translates to:
+  /// **'Best'**
+  String get qualityBest;
+
   /// No description provided for @extract.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_en.dart

@@ -50,6 +50,33 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get whisperModel => 'Whisper Model';
 
+  @override
+  String get diskUsage => 'Disk Usage';
+
+  @override
+  String get memoryUsage => 'Memory/VRAM Usage';
+
+  @override
+  String get transcriptionQuality => 'Transcription Quality';
+
+  @override
+  String get qualityLow => 'Low';
+
+  @override
+  String get qualityBasic => 'Basic';
+
+  @override
+  String get qualityGood => 'Good';
+
+  @override
+  String get qualityExcellent => 'Excellent';
+
+  @override
+  String get qualitySuperior => 'Superior (Recommended)';
+
+  @override
+  String get qualityBest => 'Best';
+
   @override
   String get extract => 'Extract';
 

lib/l10n/app_localizations_zh.dart

@@ -50,6 +50,33 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get whisperModel => 'Whisper 模型';
 
+  @override
+  String get diskUsage => '磁盘占用';
+
+  @override
+  String get memoryUsage => '内存/显存占用';
+
+  @override
+  String get transcriptionQuality => '转录质量';
+
+  @override
+  String get qualityLow => '低';
+
+  @override
+  String get qualityBasic => '基础';
+
+  @override
+  String get qualityGood => '良好';
+
+  @override
+  String get qualityExcellent => '优秀';
+
+  @override
+  String get qualitySuperior => '极佳 (推荐)';
+
+  @override
+  String get qualityBest => '最好';
+
   @override
   String get extract => '提取';
 

lib/l10n/app_zh.arb

@@ -14,6 +14,15 @@
   "clear": "清除",
   "stepExtractSubtitles": "提取字幕",
   "whisperModel": "Whisper 模型",
+  "diskUsage": "磁盘占用",
+  "memoryUsage": "内存/显存占用",
+  "transcriptionQuality": "转录质量",
+  "qualityLow": "低",
+  "qualityBasic": "基础",
+  "qualityGood": "良好",
+  "qualityExcellent": "优秀",
+  "qualitySuperior": "极佳 (推荐)",
+  "qualityBest": "最好",
   "extract": "提取",
   "downloadingModel": "正在下载模型 {name}...",
   "extractingAudio": "正在从视频中提取音频...",

lib/ui/widgets/transcription_panel.dart

@@ -53,13 +53,21 @@ class TranscriptionPanel extends StatelessWidget {
                         .map(
                           (e) => DropdownMenuItem(
                             value: e.key,
-                            child: Text(
-                              e.value,
-                              style: const TextStyle(fontSize: 14),
-                            ),
+                            child: _buildModelMenuItem(context, e.value, l10n),
                           ),
                         )
                         .toList(),
+                    selectedItemBuilder: (context) {
+                      return AppConstants.whisperModels.entries.map((e) {
+                        return Align(
+                          alignment: Alignment.centerLeft,
+                          child: Text(
+                            e.key,
+                            style: const TextStyle(fontSize: 14),
+                          ),
+                        );
+                      }).toList();
+                    },
                     onChanged: _isProcessing
                         ? null
                         : (v) {
@@ -218,4 +226,53 @@ class TranscriptionPanel extends StatelessWidget {
       ],
     );
   }
+
+  Widget _buildModelMenuItem(
+    BuildContext context,
+    WhisperModelInfo info,
+    AppLocalizations l10n,
+  ) {
+    return Container(
+      padding: const EdgeInsets.symmetric(vertical: 4),
+      child: Row(
+        children: [
+          SizedBox(
+            width: 80,
+            child: Text(
+              info.name,
+              style: const TextStyle(
+                fontWeight: FontWeight.bold,
+                fontSize: 13,
+              ),
+            ),
+          ),
+          _buildModelSpecColumn(l10n.diskUsage, info.diskUsage),
+          _buildModelSpecColumn(l10n.memoryUsage, info.memoryUsage),
+          _buildModelSpecColumn(l10n.transcriptionQuality, info.quality(l10n)),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildModelSpecColumn(String label, String value) {
+    return Expanded(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(
+            label,
+            style: TextStyle(
+              fontSize: 10,
+              color: Colors.white.withValues(alpha: 0.5),
+            ),
+          ),
+          Text(
+            value,
+            style: const TextStyle(fontSize: 12),
+          ),
+        ],
+      ),
+    );
+  }
 }