Fix production environment variables

- Remove old Confluence variables
- Add NEXT_PUBLIC_API_URL for API access

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

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

app/admin/page.tsx

@@ -0,0 +1,104 @@
+'use client'
+
+import { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import axios from 'axios';
+
+export default function AdminLogin() {
+  const router = useRouter();
+  const [username, setUsername] = useState('');
+  const [password, setPassword] = useState('');
+  const [error, setError] = useState('');
+  const [loading, setLoading] = useState(false);
+
+  const handleLogin = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setError('');
+    setLoading(true);
+
+    try {
+      const response = await axios.post(`${process.env.NEXT_PUBLIC_API_URL}/auth/login`, {
+        username,
+        password
+      });
+
+      // Store token in localStorage
+      localStorage.setItem('authToken', response.data.token);
+      localStorage.setItem('tokenExpiry', String(Date.now() + response.data.expiresIn * 1000));
+
+      // Redirect to admin dashboard
+      router.push('/admin/dashboard');
+    } catch (err) {
+      setError('Neispravno korisničko ime ili lozinka');
+      console.error('Login error:', err);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  return (
+    <div className="min-h-screen flex items-center justify-center bg-gray-50 dark:bg-gray-900 py-12 px-4 sm:px-6 lg:px-8">
+      <div className="max-w-md w-full space-y-8">
+        <div>
+          <h2 className="mt-6 text-center text-3xl font-extrabold text-gray-900 dark:text-white">
+            Admin Prijava
+          </h2>
+          <p className="mt-2 text-center text-sm text-gray-600 dark:text-gray-400">
+            Prijavite se za upravljanje filamentima
+          </p>
+        </div>
+        <form className="mt-8 space-y-6" onSubmit={handleLogin}>
+          {error && (
+            <div className="rounded-md bg-red-50 dark:bg-red-900/20 p-4">
+              <p className="text-sm text-red-800 dark:text-red-400">{error}</p>
+            </div>
+          )}
+          <div className="rounded-md shadow-sm -space-y-px">
+            <div>
+              <label htmlFor="username" className="sr-only">
+                Korisničko ime
+              </label>
+              <input
+                id="username"
+                name="username"
+                type="text"
+                autoComplete="username"
+                required
+                className="appearance-none rounded-none relative block w-full px-3 py-2 border border-gray-300 dark:border-gray-700 placeholder-gray-500 dark:placeholder-gray-400 text-gray-900 dark:text-white rounded-t-md focus:outline-none focus:ring-blue-500 focus:border-blue-500 focus:z-10 sm:text-sm dark:bg-gray-800"
+                placeholder="Korisničko ime"
+                value={username}
+                onChange={(e) => setUsername(e.target.value)}
+              />
+            </div>
+            <div>
+              <label htmlFor="password" className="sr-only">
+                Lozinka
+              </label>
+              <input
+                id="password"
+                name="password"
+                type="password"
+                autoComplete="current-password"
+                required
+                className="appearance-none rounded-none relative block w-full px-3 py-2 border border-gray-300 dark:border-gray-700 placeholder-gray-500 dark:placeholder-gray-400 text-gray-900 dark:text-white rounded-b-md focus:outline-none focus:ring-blue-500 focus:border-blue-500 focus:z-10 sm:text-sm dark:bg-gray-800"
+                placeholder="Lozinka"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+              />
+            </div>
+          </div>
+
+          <div>
+            <button
+              type="submit"
+              disabled={loading}
+              className="group relative w-full flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {loading ? 'Prijavljivanje...' : 'Prijavite se'}
+            </button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}