feat: 实现多部分上传功能，支持初始化、上传部分、完成和中止上传，添加媒体资产删除功能

frontend/portal/src/api/common.js

@@ -3,12 +3,62 @@ import { request } from '../utils/request';
 export const commonApi = {
     getOptions: () => request('/common/options'),
     checkHash: (hash) => request(`/upload/check?hash=${hash}`),
+    deleteMedia: (id) => request(`/media-assets/${id}`, { method: 'DELETE' }),
     upload: (file, type) => {
         const formData = new FormData();
         formData.append('file', file);
         formData.append('type', type);
         return request('/upload', { method: 'POST', body: formData });
     },
+    uploadMultipart: async (file, hash, onProgress) => {
+        // 1. Check Hash
+        try {
+            const res = await commonApi.checkHash(hash);
+            if (res) {
+                if (onProgress) onProgress(100);
+                return res;
+            }
+        } catch(e) {}
+
+        // 2. Init
+        const initRes = await request('/upload/init', {
+            method: 'POST',
+            body: {
+                filename: file.name,
+                size: file.size,
+                mime_type: file.type,
+                hash: hash
+            }
+        });
+
+        const { upload_id, chunk_size } = initRes;
+        const totalChunks = Math.ceil(file.size / chunk_size);
+
+        // 3. Upload Parts
+        for (let i = 0; i < totalChunks; i++) {
+            const start = i * chunk_size;
+            const end = Math.min(start + chunk_size, file.size);
+            const chunk = file.slice(start, end);
+            
+            const formData = new FormData();
+            formData.append('file', chunk);
+            formData.append('upload_id', upload_id);
+            formData.append('part_number', i + 1);
+
+            await request('/upload/part', { method: 'POST', body: formData });
+            
+            if (onProgress) {
+                const percent = Math.round(((i + 1) / totalChunks) * 100);
+                onProgress(percent);
+            }
+        }
+
+        // 4. Complete
+        return request('/upload/complete', {
+            method: 'POST',
+            body: { upload_id }
+        });
+    },
     uploadWithProgress: (file, type, onProgress) => {
         return new Promise((resolve, reject) => {
             const formData = new FormData();