🐛 fix: 修复 template run 数据格式与 identifier 缺失问题

主要修复：
1. ✅ 添加 transformFormDataToRunFormat 函数转换表单数据
2. ✅ 根据节点类型正确格式化数据：
   - image: { images: [{ url: "..." }] }
   - video: { videos: [{ url: "..." }] }
   - text: { texts: ["..."] }
   - select: { selections: "..." } (单选) / ["..."] (多选)
3. ✅ 添加 identifier 字段到 API 请求
4. ✅ 从 storage 获取用户 session 作为 identifier

修复问题：
- ❌ 之前：{ "data": { "node_xxx": "blob:..." } }
- ✅ 现在：{ "data": { "node_xxx": { "images": [{ "url": "..." }] } }, "identifier": "user-id" }

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

lib/api/template-runs.ts

@@ -1,10 +1,27 @@
 import { apiClient } from './client';
 import { RunTemplateResponse, TemplateGenerationResponse, RunTemplateData } from '../types/template-run';
+import { storage } from '../storage';
 
 export async function runTemplate(templateId: string, data: RunTemplateData): Promise<RunTemplateResponse> {
+  // 从 storage 获取用户 session 作为 identifier
+  const sessionStr = await storage.getItem('session');
+  let identifier = 'anonymous';
+
+  if (sessionStr) {
+    try {
+      const session = JSON.parse(sessionStr);
+      identifier = session?.user?.id || 'anonymous';
+    } catch (error) {
+      console.warn('Failed to parse session:', error);
+    }
+  }
+
   return apiClient<RunTemplateResponse>(`/api/templates/${templateId}/run`, {
     method: 'POST',
-    body: JSON.stringify({ data }),
+    body: JSON.stringify({
+      data,
+      identifier,
+    }),
   });
 }