feat: [US-006] - Login page

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

src/app/login/page.tsx

@@ -0,0 +1,117 @@
+'use client'
+
+import { useState } from 'react'
+import { useRouter } from 'next/navigation'
+import Link from 'next/link'
+import { createClient } from '@/lib/supabase/client'
+
+export default function LoginPage() {
+  const router = useRouter()
+  const [email, setEmail] = useState('')
+  const [password, setPassword] = useState('')
+  const [error, setError] = useState<string | null>(null)
+  const [loading, setLoading] = useState(false)
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault()
+    setError(null)
+    setLoading(true)
+
+    const supabase = createClient()
+
+    const { error } = await supabase.auth.signInWithPassword({
+      email,
+      password,
+    })
+
+    if (error) {
+      setError(error.message)
+      setLoading(false)
+      return
+    }
+
+    router.push('/dashboard')
+  }
+
+  return (
+    <div className="flex min-h-screen items-center justify-center bg-zinc-50 px-4 dark:bg-zinc-950">
+      <div className="w-full max-w-md space-y-8">
+        <div className="text-center">
+          <h1 className="text-3xl font-bold tracking-tight text-zinc-900 dark:text-zinc-50">
+            WebVNWrite
+          </h1>
+          <p className="mt-2 text-sm text-zinc-600 dark:text-zinc-400">
+            Sign in to your account
+          </p>
+        </div>
+
+        <form onSubmit={handleSubmit} className="mt-8 space-y-6">
+          {error && (
+            <div className="rounded-md bg-red-50 p-4 dark:bg-red-900/20">
+              <p className="text-sm text-red-700 dark:text-red-400">{error}</p>
+            </div>
+          )}
+
+          <div className="space-y-4">
+            <div>
+              <label
+                htmlFor="email"
+                className="block text-sm font-medium text-zinc-700 dark:text-zinc-300"
+              >
+                Email address
+              </label>
+              <input
+                id="email"
+                name="email"
+                type="email"
+                autoComplete="email"
+                required
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                className="mt-1 block w-full rounded-md border border-zinc-300 bg-white px-3 py-2 text-zinc-900 placeholder-zinc-400 shadow-sm focus:border-blue-500 focus:outline-none focus:ring-1 focus:ring-blue-500 dark:border-zinc-700 dark:bg-zinc-800 dark:text-zinc-50 dark:placeholder-zinc-500"
+                placeholder="you@example.com"
+              />
+            </div>
+
+            <div>
+              <label
+                htmlFor="password"
+                className="block text-sm font-medium text-zinc-700 dark:text-zinc-300"
+              >
+                Password
+              </label>
+              <input
+                id="password"
+                name="password"
+                type="password"
+                autoComplete="current-password"
+                required
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                className="mt-1 block w-full rounded-md border border-zinc-300 bg-white px-3 py-2 text-zinc-900 placeholder-zinc-400 shadow-sm focus:border-blue-500 focus:outline-none focus:ring-1 focus:ring-blue-500 dark:border-zinc-700 dark:bg-zinc-800 dark:text-zinc-50 dark:placeholder-zinc-500"
+                placeholder="••••••••"
+              />
+            </div>
+          </div>
+
+          <div className="flex items-center justify-end">
+            <Link
+              href="/forgot-password"
+              className="text-sm font-medium text-blue-600 hover:text-blue-500 dark:text-blue-400 dark:hover:text-blue-300"
+            >
+              Forgot your password?
+            </Link>
+          </div>
+
+          <button
+            type="submit"
+            disabled={loading}
+            className="flex w-full justify-center rounded-md bg-blue-600 px-4 py-2 text-sm font-semibold text-white shadow-sm hover:bg-blue-500 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 dark:focus:ring-offset-zinc-950"
+          >
+            {loading ? 'Signing in...' : 'Sign in'}
+          </button>
+        </form>
+      </div>
+    </div>
+  )
+}