实现快传，完善快传和网盘的功能，实现文件的互传等一系列功能

front/src/lib/netdisk-upload.ts

@@ -0,0 +1,60 @@
+import { apiBinaryUploadRequest, apiRequest, apiUploadRequest, ApiError } from './api';
+import { joinNetdiskPath, resolveTransferSaveDirectory, splitNetdiskPath } from './netdisk-paths';
+import type { FileMetadata, InitiateUploadResponse } from './types';
+
+export function normalizeNetdiskTargetPath(path: string | null | undefined, fallback = '/下载') {
+  const rawPath = path?.trim();
+  if (!rawPath) {
+    return fallback;
+  }
+
+  return joinNetdiskPath(splitNetdiskPath(rawPath === '/' ? '/' : rawPath)) || fallback;
+}
+
+export function resolveNetdiskSaveDirectory(relativePath: string | null | undefined, rootPath = '/下载') {
+  return normalizeNetdiskTargetPath(resolveTransferSaveDirectory(relativePath, rootPath));
+}
+
+export async function saveFileToNetdisk(file: File, path: string) {
+  const normalizedPath = normalizeNetdiskTargetPath(path);
+  const initiated = await apiRequest<InitiateUploadResponse>('/files/upload/initiate', {
+    method: 'POST',
+    body: {
+      path: normalizedPath,
+      filename: file.name,
+      contentType: file.type || null,
+      size: file.size,
+    },
+  });
+
+  if (initiated.direct) {
+    try {
+      await apiBinaryUploadRequest(initiated.uploadUrl, {
+        method: initiated.method,
+        headers: initiated.headers,
+        body: file,
+      });
+
+      return await apiRequest<FileMetadata>('/files/upload/complete', {
+        method: 'POST',
+        body: {
+          path: normalizedPath,
+          filename: file.name,
+          storageName: initiated.storageName,
+          contentType: file.type || null,
+          size: file.size,
+        },
+      });
+    } catch (error) {
+      if (!(error instanceof ApiError && error.isNetworkError)) {
+        throw error;
+      }
+    }
+  }
+
+  const formData = new FormData();
+  formData.append('file', file);
+  return apiUploadRequest<FileMetadata>(`/files/upload?path=${encodeURIComponent(normalizedPath)}`, {
+    body: formData,
+  });
+}