feat: admin can reroll codes if needed

src/models/index.js

@@ -337,6 +337,18 @@ const Packages = {
     return db.prepare('SELECT * FROM packages WHERE id = ?').get(id);
   },
 
+  rerollCode(packageId) {
+    const pkg = this.findById(packageId);
+    if (!pkg) return null;
+    const existing = db.prepare('SELECT unique_code FROM packages WHERE hunt_id = ?').all(pkg.hunt_id).map(r => r.unique_code);
+    let code;
+    do {
+      code = generateCode(5);
+    } while (existing.includes(code));
+    db.prepare('UPDATE packages SET unique_code = ? WHERE id = ?').run(code, packageId);
+    return code;
+  },
+
   findByHuntAndCode(shortName, uniqueCode) {
     return db.prepare(`
       SELECT p.*, h.name as hunt_name, h.short_name as hunt_short_name, h.id as hunt_id, h.expiry_date

src/routes/admin.js

@@ -149,6 +149,20 @@ router.get('/hunts/:id/pdf', requireHuntAccess, async (req, res) => {
   }
 });
 
+// ─── Reroll package code ──────────────────────────────────
+router.post('/hunts/:id/packages/:pkgId/reroll', requireHuntAccess, (req, res) => {
+  const hunt = req.hunt;
+  const pkgId = parseInt(req.params.pkgId, 10);
+  const pkg = Packages.findById(pkgId);
+  if (!pkg || pkg.hunt_id !== hunt.id) {
+    req.session.flash = { type: 'danger', message: 'Package not found.' };
+    return res.redirect(`/admin/hunts/${hunt.id}`);
+  }
+  const newCode = Packages.rerollCode(pkgId);
+  req.session.flash = { type: 'success', message: `Package #${pkg.card_number} code changed from ${pkg.unique_code} to ${newCode}.` };
+  res.redirect(`/admin/hunts/${hunt.id}`);
+});
+
 // ─── Manage user roles (admin only) ───────────────────────
 router.post('/users/:id/role', requireAdmin, (req, res) => {
   const userId = parseInt(req.params.id, 10);

src/views/admin/manage-hunt.ejs

@@ -123,6 +123,9 @@
               <div style="display: flex; gap: 0.4rem; align-items: stretch;">
                 <a href="/hunt/<%= hunt.short_name %>/<%= pkg.card_number %>" class="btn btn-sm btn-outline">View</a>
                 <button class="btn btn-sm btn-outline" onclick="navigator.clipboard.writeText('<%= baseUrl %>/loot/<%= hunt.short_name %>/<%= pkg.unique_code %>').then(()=>{this.textContent='Copied!';setTimeout(()=>this.textContent='Copy Link',1500)})">Copy Link</button>
+                <form method="POST" action="/admin/hunts/<%= hunt.id %>/packages/<%= pkg.id %>/reroll" style="margin:0;">
+                  <button type="submit" class="btn btn-sm btn-outline" title="Reroll code" onclick="return confirm('Reroll code for package #<%= pkg.card_number %>? The old code will stop working.')">&#x1F3B2;</button>
+                </form>
               </div>
             </td>
           </tr>