feat(页面): 聊天页面集成图片生成功能

- 传递 isGeneratingImage 状态到消息气泡
- 传递 generatedImages 数据到消息组件
- 支持历史消息中的生成图片显示

src/app/chat/[id]/page.tsx

@@ -112,6 +112,8 @@ export default function ChatPage({ params }: PageProps) {
           uploadedDocuments: (msg.uploadedDocuments as { name: string; size: number; type: string; content: string }[]) || undefined,
           // 从数据库加载使用的工具列表
           usedTools: (msg.usedTools as string[]) || undefined,
+          // 从数据库加载 AI 生成的图片（Gemini 等图片生成模型）
+          generatedImages: (msg.generatedImages as { mimeType: string; data: string; width?: number; height?: number }[]) || undefined,
         }));
         setInitialMessages(historyMessages);
       }
@@ -393,12 +395,31 @@ export default function ChatPage({ params }: PageProps) {
     setLinkPreviewOpen(true);
   };
 
+  // 判断是否为图片生成模型
+  const isImageGenerationModel = (modelId: string): boolean => {
+    const imageModels = [
+      'gemini-2.0-flash-preview-image-generation',
+      'gemini-3-pro-image-preview',
+      'imagen-3.0-generate-002',
+    ];
+    return imageModels.some(model => modelId.includes(model)) ||
+           modelId.includes('image-generation') ||
+           modelId.includes('imagen');
+  };
+
+  // 获取模型标签
+  const getModelTag = (modelId: string, supportsThinking: boolean): string => {
+    if (isImageGenerationModel(modelId)) return '图片';
+    if (supportsThinking) return 'Thinking';
+    return '';
+  };
+
   // 转换模型格式
   const modelOptions = models.map((m) => ({
     id: m.modelId,
     name: m.modelId,
     displayName: m.displayName,
-    tag: m.supportsThinking ? 'Thinking' : '',
+    tag: getModelTag(m.modelId, m.supportsThinking),
   }));
 
   const selectedModel = modelOptions.find((m) => m.id === selectedModelId) || modelOptions[0];
@@ -623,6 +644,8 @@ export default function ChatPage({ params }: PageProps) {
                   uploadedDocuments={message.uploadedDocuments}
                   usedTools={message.usedTools}
                   pyodideStatus={message.pyodideStatus}
+                  generatedImages={message.generatedImages}
+                  isGeneratingImage={message.isGeneratingImage}
                   onRegenerate={message.role === 'assistant' && !isStreaming ? handleRegenerate : undefined}
                   onSaveToNote={message.role === 'assistant' && !isStreaming ? handleSaveToNote : undefined}
                   onLinkClick={handleLinkClick}