Add clone button for monsters in admin panel

- Clone copies all monster data with modified key/name
- Auto-generates unique key suffix (_copy, _copy1, etc.)
- Cloned monster is disabled by default for review

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

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

admin.html

@@ -902,6 +902,7 @@
                     </td>
                     <td class="actions">
                         <button class="btn btn-secondary btn-small" onclick="editMonster('${m.id}')">Edit</button>
+                        <button class="btn btn-secondary btn-small" onclick="cloneMonster('${m.id}')">Clone</button>
                         <button class="btn btn-danger btn-small" onclick="deleteMonster('${m.id}')">Delete</button>
                     </td>
                 </tr>
@@ -962,6 +963,43 @@
             document.getElementById('monsterModal').classList.add('active');
         }
 
+        function cloneMonster(id) {
+            const monster = monsters.find(m => m.id === id);
+            if (!monster) return;
+
+            // Generate unique key suffix
+            let suffix = '_copy';
+            let newKey = monster.key + suffix;
+            let counter = 1;
+            while (monsters.some(m => m.key === newKey)) {
+                newKey = monster.key + suffix + counter;
+                counter++;
+            }
+
+            document.getElementById('monsterModalTitle').textContent = 'Clone Monster';
+            document.getElementById('monsterId').value = ''; // Empty = create new
+            document.getElementById('monsterName').value = monster.name + ' (Copy)';
+            document.getElementById('monsterKey').value = newKey;
+            document.getElementById('monsterMinLevel').value = monster.min_level;
+            document.getElementById('monsterMaxLevel').value = monster.max_level;
+            document.getElementById('monsterHp').value = monster.base_hp;
+            document.getElementById('monsterAtk').value = monster.base_atk;
+            document.getElementById('monsterDef').value = monster.base_def;
+            document.getElementById('monsterXp').value = monster.base_xp;
+            document.getElementById('monsterWeight').value = monster.spawn_weight || 100;
+            document.getElementById('monsterEnabled').checked = false; // Disabled by default
+
+            // Parse and copy dialogues
+            const dialogues = monster.dialogues ? JSON.parse(monster.dialogues) : {};
+            document.getElementById('dialogueAnnoyed').value = (dialogues.annoyed || []).join('\n');
+            document.getElementById('dialogueFrustrated').value = (dialogues.frustrated || []).join('\n');
+            document.getElementById('dialogueDesperate').value = (dialogues.desperate || []).join('\n');
+            document.getElementById('dialoguePhilosophical').value = (dialogues.philosophical || []).join('\n');
+            document.getElementById('dialogueExistential').value = (dialogues.existential || []).join('\n');
+
+            document.getElementById('monsterModal').classList.add('active');
+        }
+
         document.getElementById('addMonsterBtn').addEventListener('click', () => {
             document.getElementById('monsterModalTitle').textContent = 'Add Monster';
             document.getElementById('monsterForm').reset();