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+<!DOCTYPE html>
+<html lang="hr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Regenerate GIFs - Znakovni.hr Admin</title>
+    <style>
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+            max-width: 800px;
+            margin: 50px auto;
+            padding: 20px;
+            background: #f5f5f5;
+        }
+        .container {
+            background: white;
+            padding: 30px;
+            border-radius: 8px;
+            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+        }
+        h1 {
+            color: #333;
+            margin-bottom: 10px;
+        }
+        .warning {
+            background: #fff3cd;
+            border: 1px solid #ffc107;
+            padding: 15px;
+            border-radius: 4px;
+            margin: 20px 0;
+        }
+        .info {
+            background: #d1ecf1;
+            border: 1px solid #0c5460;
+            padding: 15px;
+            border-radius: 4px;
+            margin: 20px 0;
+        }
+        button {
+            background: #007bff;
+            color: white;
+            border: none;
+            padding: 12px 24px;
+            font-size: 16px;
+            border-radius: 4px;
+            cursor: pointer;
+            margin-top: 20px;
+        }
+        button:hover {
+            background: #0056b3;
+        }
+        button:disabled {
+            background: #6c757d;
+            cursor: not-allowed;
+        }
+        #result {
+            margin-top: 20px;
+            padding: 15px;
+            border-radius: 4px;
+            display: none;
+        }
+        #result.success {
+            background: #d4edda;
+            border: 1px solid #28a745;
+            color: #155724;
+            display: block;
+        }
+        #result.error {
+            background: #f8d7da;
+            border: 1px solid #dc3545;
+            color: #721c24;
+            display: block;
+        }
+        .progress {
+            margin-top: 20px;
+            display: none;
+        }
+        .spinner {
+            border: 4px solid #f3f3f3;
+            border-top: 4px solid #007bff;
+            border-radius: 50%;
+            width: 40px;
+            height: 40px;
+            animation: spin 1s linear infinite;
+            margin: 20px auto;
+        }
+        @keyframes spin {
+            0% { transform: rotate(0deg); }
+            100% { transform: rotate(360deg); }
+        }
+        pre {
+            background: #f8f9fa;
+            padding: 10px;
+            border-radius: 4px;
+            overflow-x: auto;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <h1>🎨 Regenerate GIF Previews</h1>
+        <p>This tool will regenerate GIF preview images for all videos in the database.</p>
+        
+        <div class="warning">
+            <strong>⚠️ Warning:</strong> This process may take several minutes depending on the number of videos.
+            Make sure you are logged in as an admin before clicking the button.
+        </div>
+
+        <div class="info">
+            <strong>ℹ️ What this does:</strong>
+            <ul>
+                <li>Finds all videos in the database</li>
+                <li>Generates a 300px GIF preview (10fps, 3 seconds) for each video</li>
+                <li>Saves GIFs to /uploads/gifs/ directory</li>
+                <li>Creates database records for each GIF</li>
+                <li>Deletes old GIF files if they exist</li>
+            </ul>
+        </div>
+
+        <button id="regenerateBtn" onclick="regenerateGifs()">
+            🔄 Start GIF Regeneration
+        </button>
+
+        <div id="progress" class="progress">
+            <div class="spinner"></div>
+            <p style="text-align: center;">Processing videos... Please wait.</p>
+        </div>
+
+        <div id="result"></div>
+    </div>
+
+    <script>
+        async function regenerateGifs() {
+            const btn = document.getElementById('regenerateBtn');
+            const progress = document.getElementById('progress');
+            const result = document.getElementById('result');
+
+            // Reset UI
+            btn.disabled = true;
+            progress.style.display = 'block';
+            result.style.display = 'none';
+            result.className = '';
+            result.innerHTML = '';
+
+            try {
+                const response = await fetch('/api/terms/regenerate-all-gifs', {
+                    method: 'POST',
+                    credentials: 'include', // Include cookies for authentication
+                    headers: {
+                        'Content-Type': 'application/json'
+                    }
+                });
+
+                const data = await response.json();
+
+                progress.style.display = 'none';
+
+                if (response.ok) {
+                    result.className = 'success';
+                    result.innerHTML = `
+                        <h3>✅ Success!</h3>
+                        <p><strong>Total videos:</strong> ${data.total}</p>
+                        <p><strong>Successfully processed:</strong> ${data.success}</p>
+                        <p><strong>Failed:</strong> ${data.failed}</p>
+                        ${data.errors && data.errors.length > 0 ? `
+                            <details>
+                                <summary>Show errors (${data.errors.length})</summary>
+                                <pre>${data.errors.join('\n')}</pre>
+                            </details>
+                        ` : ''}
+                        <p style="margin-top: 15px;">You can now refresh the dictionary page to see the GIF previews!</p>
+                    `;
+                } else {
+                    throw new Error(data.message || data.error || 'Unknown error');
+                }
+            } catch (error) {
+                progress.style.display = 'none';
+                result.className = 'error';
+                result.innerHTML = `
+                    <h3>❌ Error</h3>
+                    <p>${error.message}</p>
+                    <p>Make sure you are logged in as an admin and try again.</p>
+                `;
+            } finally {
+                btn.disabled = false;
+            }
+        }
+    </script>
+</body>
+</html>
+
