fix: Wrap useSearchParams in Suspense boundary

Next.js 15 requires useSearchParams() to be wrapped in a
Suspense boundary for static page generation.

- Split LoginForm into separate component
- Add Suspense wrapper with loading skeleton
- Fixes build error on /login page

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(auth)/login/page.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { useState } from 'react'
+import { Suspense, useState } from 'react'
 import { useRouter, useSearchParams } from 'next/navigation'
 import { signIn } from 'next-auth/react'
 import { Button } from '@/components/ui/button'
@@ -15,7 +15,7 @@ import {
   CardTitle,
 } from '@/components/ui/card'
 
-export default function LoginPage() {
+function LoginForm() {
   const router = useRouter()
   const searchParams = useSearchParams()
   const callbackUrl = searchParams.get('callbackUrl') || '/'
@@ -55,79 +55,107 @@ export default function LoginPage() {
   }
 
   return (
-    <div className="min-h-screen flex items-center justify-center bg-gray-50 py-12 px-4 sm:px-6 lg:px-8">
-      <Card className="w-full max-w-md">
-        <CardHeader className="space-y-1">
-          <CardTitle className="text-2xl font-bold text-center">
-            LetsBe Hub
-          </CardTitle>
-          <CardDescription className="text-center">
-            Sign in to your account
-          </CardDescription>
-        </CardHeader>
-        <form onSubmit={handleSubmit}>
-          <CardContent className="space-y-4">
-            {(error || loginError) && (
-              <div className="p-3 text-sm text-red-500 bg-red-50 rounded-md">
-                {error === 'CredentialsSignin'
-                  ? 'Invalid email or password'
-                  : loginError || error}
-              </div>
-            )}
-
-            <div className="flex gap-2">
-              <Button
-                type="button"
-                variant={userType === 'staff' ? 'default' : 'outline'}
-                className="flex-1"
-                onClick={() => setUserType('staff')}
-              >
-                Staff Login
-              </Button>
-              <Button
-                type="button"
-                variant={userType === 'customer' ? 'default' : 'outline'}
-                className="flex-1"
-                onClick={() => setUserType('customer')}
-              >
-                Customer Login
-              </Button>
+    <Card className="w-full max-w-md">
+      <CardHeader className="space-y-1">
+        <CardTitle className="text-2xl font-bold text-center">
+          LetsBe Hub
+        </CardTitle>
+        <CardDescription className="text-center">
+          Sign in to your account
+        </CardDescription>
+      </CardHeader>
+      <form onSubmit={handleSubmit}>
+        <CardContent className="space-y-4">
+          {(error || loginError) && (
+            <div className="p-3 text-sm text-red-500 bg-red-50 rounded-md">
+              {error === 'CredentialsSignin'
+                ? 'Invalid email or password'
+                : loginError || error}
             </div>
+          )}
 
-            <div className="space-y-2">
-              <Label htmlFor="email">Email</Label>
-              <Input
-                id="email"
-                type="email"
-                placeholder="Enter your email"
-                value={email}
-                onChange={(e) => setEmail(e.target.value)}
-                required
-                autoComplete="email"
-              />
-            </div>
-
-            <div className="space-y-2">
-              <Label htmlFor="password">Password</Label>
-              <Input
-                id="password"
-                type="password"
-                placeholder="Enter your password"
-                value={password}
-                onChange={(e) => setPassword(e.target.value)}
-                required
-                autoComplete="current-password"
-              />
-            </div>
-          </CardContent>
-
-          <CardFooter>
-            <Button type="submit" className="w-full" disabled={isLoading}>
-              {isLoading ? 'Signing in...' : 'Sign In'}
+          <div className="flex gap-2">
+            <Button
+              type="button"
+              variant={userType === 'staff' ? 'default' : 'outline'}
+              className="flex-1"
+              onClick={() => setUserType('staff')}
+            >
+              Staff Login
             </Button>
-          </CardFooter>
-        </form>
-      </Card>
+            <Button
+              type="button"
+              variant={userType === 'customer' ? 'default' : 'outline'}
+              className="flex-1"
+              onClick={() => setUserType('customer')}
+            >
+              Customer Login
+            </Button>
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="email">Email</Label>
+            <Input
+              id="email"
+              type="email"
+              placeholder="Enter your email"
+              value={email}
+              onChange={(e) => setEmail(e.target.value)}
+              required
+              autoComplete="email"
+            />
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="password">Password</Label>
+            <Input
+              id="password"
+              type="password"
+              placeholder="Enter your password"
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              required
+              autoComplete="current-password"
+            />
+          </div>
+        </CardContent>
+
+        <CardFooter>
+          <Button type="submit" className="w-full" disabled={isLoading}>
+            {isLoading ? 'Signing in...' : 'Sign In'}
+          </Button>
+        </CardFooter>
+      </form>
+    </Card>
+  )
+}
+
+function LoginFormSkeleton() {
+  return (
+    <Card className="w-full max-w-md">
+      <CardHeader className="space-y-1">
+        <CardTitle className="text-2xl font-bold text-center">
+          LetsBe Hub
+        </CardTitle>
+        <CardDescription className="text-center">
+          Loading...
+        </CardDescription>
+      </CardHeader>
+      <CardContent className="space-y-4">
+        <div className="h-10 bg-gray-200 rounded animate-pulse" />
+        <div className="h-10 bg-gray-200 rounded animate-pulse" />
+        <div className="h-10 bg-gray-200 rounded animate-pulse" />
+      </CardContent>
+    </Card>
+  )
+}
+
+export default function LoginPage() {
+  return (
+    <div className="min-h-screen flex items-center justify-center bg-gray-50 py-12 px-4 sm:px-6 lg:px-8">
+      <Suspense fallback={<LoginFormSkeleton />}>
+        <LoginForm />
+      </Suspense>
     </div>
   )
 }