feat: add model selection for scene fusion - allow choosing between Alibaba and Gemini models

app/(admin)/settings/admin-settings-client.tsx

@@ -404,6 +404,7 @@ export function AdminSettingsClient() {
     enabled: true,
     defaultPrompt: "将图1的产品替换到图2的场景中，保持图1产品的外观、颜色和细节不变，自然融合到图2的环境中。",
     maxScenes: 10,
+    modelId: "", // 使用的生图模型ID
   });
 
   // 加载抠图API配置
@@ -497,11 +498,13 @@ export function AdminSettingsClient() {
         enabled?: boolean;
         defaultPrompt?: string;
         maxScenes?: number;
+        modelId?: string;
       };
       setSceneFusionConfig({
         enabled: config.enabled ?? true,
         defaultPrompt: config.defaultPrompt || "将图1的产品替换到图2的场景中，保持图1产品的外观、颜色和细节不变，自然融合到图2的环境中。",
         maxScenes: config.maxScenes ?? 10,
+        modelId: config.modelId ?? "",
       });
     }
   }, [sceneFusionConfigData]);
@@ -966,6 +969,7 @@ export function AdminSettingsClient() {
             enabled: sceneFusionConfig.enabled,
             defaultPrompt: sceneFusionConfig.defaultPrompt.trim(),
             maxScenes: sceneFusionConfig.maxScenes,
+            modelId: sceneFusionConfig.modelId,
           },
         }),
       });
@@ -3898,12 +3902,47 @@ export function AdminSettingsClient() {
                 </div>
               </div>
 
+              {/* 生图模型选择 */}
+              <div className="space-y-2">
+                <Label htmlFor="sceneFusionModel">生图模型</Label>
+                <Select
+                  value={sceneFusionConfig.modelId}
+                  onValueChange={(value) => setSceneFusionConfig({ ...sceneFusionConfig, modelId: value })}
+                  disabled={!sceneFusionConfig.enabled}
+                >
+                  <SelectTrigger>
+                    <SelectValue placeholder="选择生图模型（留空使用默认阿里模型）" />
+                  </SelectTrigger>
+                  <SelectContent>
+                    <SelectItem value="">自动选择（默认阿里生图）</SelectItem>
+                    {(modelsData?.models || [])
+                      .filter((m: AiModel) => {
+                        // 过滤出支持图片编辑的模型（阿里生图、Gemini 图片模型等）
+                        const provider = (providersData?.providers || []).find((p: AiProvider) => p.id === m.providerId);
+                        return provider && ["alibaba-image", "gemini-image"].includes(provider.type);
+                      })
+                      .map((m: AiModel) => {
+                        const provider = (providersData?.providers || []).find((p: AiProvider) => p.id === m.providerId);
+                        return (
+                          <SelectItem key={m.id} value={m.id}>
+                            {m.displayName} ({provider?.name})
+                          </SelectItem>
+                        );
+                      })
+                    }
+                  </SelectContent>
+                </Select>
+                <div className="text-xs text-muted-foreground">
+                  选择用于场景裂变的生图模型，支持阿里生图和Gemini图片编辑模型
+                </div>
+              </div>
+
               <div className="rounded-lg border border-blue-200 bg-blue-50 p-4 space-y-2">
                 <div className="text-sm font-medium text-blue-900">功能说明</div>
                 <div className="text-xs text-blue-800 space-y-1">
                   <p>• 用户上传1张产品图和多张场景参考图</p>
                   <p>• 系统自动将产品图融合到每个场景中</p>
-                  <p>• 使用已配置的阿里生图模型进行处理</p>
+                  <p>• 支持选择阿里生图或Gemini图片模型</p>
                   <p>• 生成的图片会自动保存到用户相册</p>
                 </div>
               </div>

app/api/scene-fusion/route.ts

@@ -42,11 +42,13 @@ async function getSceneFusionConfig() {
         enabled?: boolean;
         defaultPrompt?: string;
         maxScenes?: number;
+        modelId?: string;
       };
       return {
         enabled: config.enabled ?? true,
         defaultPrompt: config.defaultPrompt || FALLBACK_PROMPT,
         maxScenes: config.maxScenes ?? 10,
+        modelId: config.modelId || "",
       };
     }
   } catch (error) {
@@ -57,6 +59,7 @@ async function getSceneFusionConfig() {
     enabled: true,
     defaultPrompt: FALLBACK_PROMPT,
     maxScenes: 10,
+    modelId: "",
   };
 }
 
@@ -418,22 +421,39 @@ export async function POST(request: Request) {
     console.log(`[SceneFusion] Processing ${scenes.length} scenes for user ${session.user.id}`);
     console.log(`[SceneFusion] Product name: ${productName || '(not specified)'}`);
     console.log(`[SceneFusion] Using default prompt: ${config.defaultPrompt.substring(0, 50)}...`);
+    console.log(`[SceneFusion] Configured model ID: ${config.modelId || '(auto - default alibaba)'}`);
     
-    // 4. 获取阿里生图模型配置
+    // 4. 获取生图模型配置
     const allModels = await getEnabledAiModelsWithProvider();
-    const alibabaModel = allModels.find(
-      (m) => m.provider.type === "alibaba-image" && m.model.isEnabled
-    );
     
-    if (!alibabaModel) {
+    let selectedModel: typeof allModels[0] | undefined;
+    
+    // 如果配置了指定的模型ID，优先使用
+    if (config.modelId) {
+      selectedModel = allModels.find(
+        (m) => m.model.id === config.modelId && m.model.isEnabled
+      );
+      if (!selectedModel) {
+        console.warn(`[SceneFusion] Configured model ${config.modelId} not found or disabled, falling back to default`);
+      }
+    }
+    
+    // 如果没有配置或配置的模型不可用，使用默认的阿里生图模型
+    if (!selectedModel) {
+      selectedModel = allModels.find(
+        (m) => m.provider.type === "alibaba-image" && m.model.isEnabled
+      );
+    }
+    
+    if (!selectedModel) {
       return NextResponse.json(
-        { error: "未配置阿里生图模型，请联系管理员" },
+        { error: "未配置可用的生图模型，请联系管理员" },
         { status: 500 }
       );
     }
     
-    const { provider, model } = alibabaModel;
-    console.log(`[SceneFusion] Using model: ${model.displayName} (${model.modelId})`);
+    const { provider, model } = selectedModel;
+    console.log(`[SceneFusion] Using model: ${model.displayName} (${model.modelId}) - Provider: ${provider.type}`);
     
     // 4. 预处理：将 Base64 图片上传到 S3
     let productImageUrl = productImage;