auto-claude: subtask-1-2 - Add attempt tracking and lockout UI feedback

Added visual feedback for failed login attempts and account lockout:
- Show remaining attempts warning after failed logins
- Display lockout message with time-to-reset when rate limited
- Added AlertCircle icons following ContactForm pattern
- Tracks lockout state and remaining attempts in component state

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

src/components/auth/LoginForm.tsx

@@ -2,7 +2,7 @@
 
 import { useState } from 'react';
 import { useRouter } from 'next/navigation';
-import { Lock, Loader2 } from 'lucide-react';
+import { Lock, Loader2, AlertCircle } from 'lucide-react';
 import { useTranslations, useLocale } from 'next-intl';
 import { createClient } from '@/lib/supabase/client';
 import { rateLimiter } from '../../utils/rateLimiting';
@@ -15,17 +15,24 @@ export default function LoginForm() {
   const [password, setPassword] = useState('');
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
+  const [remainingAttempts, setRemainingAttempts] = useState<number | null>(null);
+  const [isLockedOut, setIsLockedOut] = useState(false);
+  const [lockoutMinutes, setLockoutMinutes] = useState(0);
 
   const handleLogin = async (e: React.FormEvent) => {
     e.preventDefault();
     setLoading(true);
     setError(null);
+    setRemainingAttempts(null);
+    setIsLockedOut(false);
 
     try {
       // Check rate limiting
       const clientIp = '127.0.0.1'; // In production, get this from the request
       if (rateLimiter.isRateLimited(clientIp)) {
         const timeToReset = Math.ceil(rateLimiter.getTimeToReset(clientIp) / 1000 / 60);
+        setIsLockedOut(true);
+        setLockoutMinutes(timeToReset);
         throw new Error(`Too many attempts. Please try again in ${timeToReset} minutes.`);
       }
 
@@ -35,7 +42,12 @@ export default function LoginForm() {
         password,
       });
 
-      if (error) throw error;
+      if (error) {
+        // Get remaining attempts after failed login
+        const remaining = rateLimiter.getRemainingAttempts(clientIp);
+        setRemainingAttempts(remaining);
+        throw error;
+      }
       router.push(`/${locale}/dashboard`);
     } catch (err) {
       setError(err instanceof Error ? err.message : t('form.errors.default'));
@@ -53,9 +65,29 @@ export default function LoginForm() {
         </div>
 
         <form className="mt-8 space-y-6" onSubmit={handleLogin}>
-          {error && (
-            <div className="bg-red-500/10 border border-red-500/20 text-red-500 p-4 rounded-lg text-sm">
-              {error}
+          {isLockedOut && (
+            <div className="bg-red-500/10 border border-red-500/20 text-red-500 p-4 rounded-lg flex items-center">
+              <AlertCircle className="h-5 w-5 mr-2 flex-shrink-0" />
+              <div>
+                <p className="font-medium">Account temporarily locked</p>
+                <p className="text-sm mt-1">
+                  Too many failed login attempts. Please try again in {lockoutMinutes} {lockoutMinutes === 1 ? 'minute' : 'minutes'}.
+                </p>
+              </div>
+            </div>
+          )}
+
+          {error && !isLockedOut && (
+            <div className="bg-red-500/10 border border-red-500/20 text-red-500 p-4 rounded-lg">
+              <div className="flex items-center">
+                <AlertCircle className="h-5 w-5 mr-2 flex-shrink-0" />
+                <span>{error}</span>
+              </div>
+              {remainingAttempts !== null && remainingAttempts > 0 && (
+                <p className="text-sm mt-2 ml-7">
+                  {remainingAttempts} {remainingAttempts === 1 ? 'attempt' : 'attempts'} remaining before temporary lockout.
+                </p>
+              )}
             </div>
           )}