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/transfer-links.ts

@@ -0,0 +1,24 @@
+export type TransferRouterMode = 'browser' | 'hash';
+
+export const APP_TRANSFER_ROUTE = '/transfer';
+export const PUBLIC_TRANSFER_ROUTE = '/transfer';
+export const LEGACY_PUBLIC_TRANSFER_ROUTE = '/t';
+
+export function getTransferRouterMode(mode: string | undefined = import.meta.env?.VITE_ROUTER_MODE): TransferRouterMode {
+  return mode === 'hash' ? 'hash' : 'browser';
+}
+
+export function buildTransferShareUrl(
+  origin: string,
+  sessionId: string,
+  routerMode: TransferRouterMode = 'browser',
+) {
+  const normalizedOrigin = origin.replace(/\/+$/, '');
+  const encodedSessionId = encodeURIComponent(sessionId);
+
+  if (routerMode === 'hash') {
+    return `${normalizedOrigin}/#${PUBLIC_TRANSFER_ROUTE}?session=${encodedSessionId}`;
+  }
+
+  return `${normalizedOrigin}${PUBLIC_TRANSFER_ROUTE}?session=${encodedSessionId}`;
+}