feat: set default reasoning effort to low for all AI requests

kouyu_english/assets/config/ai_config.json

@@ -2,6 +2,7 @@
   "provider": "compatible",
   "endpoint": "https://codex.slcydia.fun/v1/responses",
   "model": "gemini-3.7-flash-high",
+  "reasoningEffort": "low",
   "apiKey": "***REMOVED***",
   "description": "默认 AI 对话服务配置。provider 可选: compatible (OpenAI 兼容/CLIProxyAPI/OneAPI), openAi, gemini, mock"
 }

kouyu_english/lib/core/ai_config.dart

@@ -7,6 +7,7 @@ class AiConfigFile {
     required this.provider,
     required this.endpoint,
     required this.model,
+    this.reasoningEffort = 'low',
     this.apiKey,
     this.description,
   });
@@ -14,6 +15,7 @@ class AiConfigFile {
   final AiProviderType provider;
   final String endpoint;
   final String model;
+  final String reasoningEffort;
   final String? apiKey;
   final String? description;
 
@@ -25,10 +27,15 @@ class AiConfigFile {
       (p) => p.name.toLowerCase() == providerStr.toLowerCase(),
       orElse: () => AiProviderType.compatible,
     );
+    final effort = (json['reasoningEffort'] as String? ??
+            json['reasoning_effort'] as String? ??
+            'low')
+        .trim();
     return AiConfigFile(
       provider: provider,
       endpoint: (json['endpoint'] as String? ?? '').trim(),
       model: (json['model'] as String? ?? '').trim(),
+      reasoningEffort: effort.isEmpty ? 'low' : effort,
       apiKey: json['apiKey'] as String?,
       description: json['description'] as String?,
     );
@@ -43,6 +50,7 @@ class AiConfigFile {
     'provider': provider.name,
     'endpoint': endpoint,
     'model': model,
+    'reasoningEffort': reasoningEffort,
     if (apiKey != null) 'apiKey': apiKey,
     if (description != null) 'description': description,
   };
@@ -62,12 +70,14 @@ class AiConfigFile {
     AiProviderType? provider,
     String? endpoint,
     String? model,
+    String? reasoningEffort,
     String? apiKey,
     String? description,
   }) => AiConfigFile(
     provider: provider ?? this.provider,
     endpoint: endpoint ?? this.endpoint,
     model: model ?? this.model,
+    reasoningEffort: reasoningEffort ?? this.reasoningEffort,
     apiKey: apiKey ?? this.apiKey,
     description: description ?? this.description,
   );

kouyu_english/lib/core/ai_service.dart

@@ -157,7 +157,12 @@ class AiService {
                   }
                 ]
               }
-            ]
+            ],
+            'generationConfig': {
+              'thinkingConfig': {
+                'thinkingBudget': 1024,
+              },
+            },
           }),
         ).timeout(const Duration(seconds: 25));
         if (response.statusCode < 200 || response.statusCode >= 300) return null;
@@ -189,6 +194,7 @@ class AiService {
                 ],
               }
             ],
+            'reasoning_effort': 'low',
             'temperature': 0.1,
           }),
         ).timeout(const Duration(seconds: 25));
@@ -212,12 +218,15 @@ class AiService {
     required List<Map<String, String>> messages,
     double? temperature,
     int? maxTokens,
+    String reasoningEffort = 'low',
   }) {
     final isResponses = uri.path.endsWith('/responses');
     if (isResponses) {
       return {
         'model': model,
         'input': messages,
+        'reasoning': {'effort': reasoningEffort},
+        'reasoning_effort': reasoningEffort,
         if (temperature != null) 'temperature': temperature,
         if (maxTokens != null) 'max_output_tokens': maxTokens,
       };
@@ -225,11 +234,28 @@ class AiService {
     return {
       'model': model,
       'messages': messages,
+      'reasoning_effort': reasoningEffort,
       if (temperature != null) 'temperature': temperature,
       if (maxTokens != null) 'max_tokens': maxTokens,
     };
   }
 
+  static Map<String, dynamic> _buildGeminiGenerationConfig({
+    double? temperature,
+    int? maxOutputTokens,
+    String? responseMimeType,
+    int thinkingBudget = 1024,
+  }) {
+    return {
+      if (temperature != null) 'temperature': temperature,
+      if (maxOutputTokens != null) 'maxOutputTokens': maxOutputTokens,
+      if (responseMimeType != null) 'responseMimeType': responseMimeType,
+      'thinkingConfig': {
+        'thinkingBudget': thinkingBudget,
+      },
+    };
+  }
+
   /// Returns a display-only Chinese gloss for an unknown word or phrase.
   /// This is deliberately not a LexiconEntry and cannot affect review/mastery.
   Future<String?> temporaryDefinition({
@@ -278,10 +304,10 @@ class AiService {
                           ],
                         },
                       ],
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'maxOutputTokens': 200,
+                        maxOutputTokens: 200,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,
@@ -365,11 +391,11 @@ class AiService {
                           ],
                         },
                       ],
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'temperature': 0,
+                        temperature: 0,
-                        'maxOutputTokens': 200,
+                        maxOutputTokens: 200,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,
@@ -483,11 +509,11 @@ class AiService {
                             },
                           )
                           .toList(),
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'temperature': 0.3,
+                        temperature: 0.3,
-                        'maxOutputTokens': 300,
+                        maxOutputTokens: 300,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,
@@ -559,11 +585,11 @@ class AiService {
                           ],
                         },
                       ],
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'temperature': 0.2,
+                        temperature: 0.2,
-                        'maxOutputTokens': 300,
+                        maxOutputTokens: 300,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,
@@ -652,11 +678,11 @@ Learner wrote: $answer''';
                           ],
                         },
                       ],
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'temperature': 0,
+                        temperature: 0,
-                        'maxOutputTokens': 300,
+                        maxOutputTokens: 300,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,
@@ -730,11 +756,11 @@ Learner wrote: $answer''';
                           ],
                         },
                       ],
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'temperature': 0.1,
+                        temperature: 0.1,
-                        'maxOutputTokens': 850,
+                        maxOutputTokens: 850,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,
@@ -838,11 +864,11 @@ Learner wrote: $answer''';
                           ],
                         },
                       ],
-                      'generationConfig': {
+                      'generationConfig': _buildGeminiGenerationConfig(
-                        'temperature': 0,
+                        temperature: 0,
-                        'maxOutputTokens': 200,
+                        maxOutputTokens: 200,
-                        'responseMimeType': 'application/json',
+                        responseMimeType: 'application/json',
-                      },
+                      ),
                     }
                   : _buildOpenAiPayload(
                       uri: uri,