feat(remote): 实现文件上传真实进度显示

- 使用分块上传替代一次性上传
- 调用 /upload/start → /upload/chunk → /upload/merge 接口
- 通过 IPC 事件实时推送上传进度到前端
- 修复 merge 时未使用目标路径的问题

src/types/electron.d.ts

@@ -15,6 +15,7 @@ export interface ElectronAPI {
   onRemoteClipboardSyncFromRemote: (callback: () => void) => () => void
   onRemoteClipboardAutoSync: (callback: (text: string) => void) => () => void
   onDownloadProgress: (callback: (data: { progress: number; id: string }) => void) => () => void
+  onUploadProgress: (callback: (data: { progress: number; id: string }) => void) => () => void
   clipboardReadText: () => Promise<{ success: boolean; text?: string; error?: string }>
   clipboardWriteText: (text: string) => Promise<{ success: boolean; error?: string }>
   remoteFetchDrives: (serverHost: string, port: number, password?: string) => Promise<{
@@ -27,7 +28,7 @@ export interface ElectronAPI {
     data?: Array<{ name: string; path: string; type: 'file' | 'dir'; size: number; modified?: string }>
     error?: string
   }>
-  remoteUploadFile: (serverHost: string, port: number, filePath: string, remotePath: string, password?: string) => Promise<{
+  remoteUploadFile: (id: string, serverHost: string, port: number, filePath: string, remotePath: string, password?: string) => Promise<{
     success: boolean
     error?: string
   }>