feat: 更新 Vercel 配置，添加 .well-known 路径的重写规则和 CORS 头部

Author: Sunwuyuan

vercel.json

@@ -1,9 +1,22 @@
 {
-    "rewrites": [
-      { "source": "/:match*", "destination": "/" },
-      {
-        "source": "/scratch/:path*",
-        "destination": "/scratch/:path*"
-      }
-    ]
-  }
+  "rewrites": [
+    {
+      "source": "/.well-known/webfinger",
+      "destination": "${VITE_APP_BASE_API}/.well-known/webfinger"
+    },
+    {
+      "source": "/.well-known/nodeinfo",
+      "destination": "${VITE_APP_BASE_API}/.well-known/nodeinfo"
+    },
+    {
+      "source": "/.well-known/host-meta",
+      "destination": "${VITE_APP_BASE_API}/.well-known/host-meta"
+    }
+  ],
+  "headers": [
+    {
+      "source": "/.well-known/webfinger",
+      "headers": [{ "key": "Access-Control-Allow-Origin", "value": "*" }]
+    }
+  ]
+}