feat: Implement role-based access control and enhance permissions system

app/api/roles/users/route.ts

@@ -0,0 +1,43 @@
+import { createDb } from "@/lib/db"
+import { userRoles, users } from "@/lib/schema"
+import { eq } from "drizzle-orm"
+
+export const runtime = "edge"
+
+export async function GET(request: Request) {
+  const url = new URL(request.url)
+  const email = url.searchParams.get('email')
+
+  if (!email) {
+    return Response.json(
+      { error: "邮箱地址不能为空" },
+      { status: 400 }
+    )
+  }
+
+  const db = createDb()
+  
+  const user = await db.query.users.findFirst({
+    where: eq(users.email, email),
+  })
+
+  if (!user) {
+    return Response.json({ user: null })
+  }
+
+  const userRole = await db.query.userRoles.findFirst({
+    where: eq(userRoles.userId, user.id),
+    with: {
+      role: true
+    }
+  })
+
+  return Response.json({
+    user: {
+      id: user.id,
+      name: user.name,
+      email: user.email,
+      role: userRole?.role.name
+    }
+  })
+}