Add mobile nav toggle, responsive admin tables, and menu reordering

- Public site: replace the always-hidden mobile nav with a hamburger
  toggle (index.php, menu.php, main.js, styles.css)
- Admin: render the Menu/Announcements/Users tables as labeled cards
  below ~760px instead of squeezing descriptions into unreadable
  single-word-per-line columns
- Admin menu: replace the manual "Order" number (which allowed
  duplicates and never reflected in real time) with ↑/↓ buttons that
  reorder items and categories immediately and renumber sort_order
  sequentially on every move, self-healing any stale duplicates

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

menu.php

@@ -49,11 +49,22 @@ $siteUrl = rtrim(SITE_URL, '/');
         <img class="knot" src="./assets/knot.png" alt="">
         <span>THE OLD FITZ</span>
       </a>
-      <nav class="links" aria-label="Primary">
+      <button type="button" class="nav-toggle" id="nav-toggle" aria-label="Toggle menu" aria-expanded="false" aria-controls="primary-nav">
+        <svg class="icon-menu" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round">
+          <line x1="3" y1="6" x2="21" y2="6" />
+          <line x1="3" y1="12" x2="21" y2="12" />
+          <line x1="3" y1="18" x2="21" y2="18" />
+        </svg>
+        <svg class="icon-close" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round">
+          <line x1="5" y1="5" x2="19" y2="19" />
+          <line x1="19" y1="5" x2="5" y2="19" />
+        </svg>
+      </button>
+      <nav class="links" id="primary-nav" aria-label="Primary">
         <a href="./#about">About</a>
         <a href="./#visit">Hours &amp; Visit</a>
         <a href="./#music">Live Music</a>
-        <a href="menu.php" style="color: var(--gold-bright);">Menu</a>
+        <a href="menu.php" class="active">Menu</a>
         <a href="./#contact">Contact</a>
       </nav>
       <a class="nav-cta" href="https://www.google.com/maps/search/?api=1&amp;query=100+N+Washington+St+Marion+IN" target="_blank" rel="noopener">Get Directions</a>
@@ -197,6 +208,8 @@ $siteUrl = rtrim(SITE_URL, '/');
     </div>
   </footer>
 
+  <script src="main.js" defer></script>
+
 </body>
 
 </html>