Fix Map settings popover rendering under the Live map

The popover sat below Leaflet's map panes and controls (z-index up to
1000), so it was obscured by the map. Lift the control wrapper and popover
to z-index 1200 (with the click-catcher backdrop just under it) so the
menu renders above the map.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Web App/server/dist/index.html

@@ -35,8 +35,8 @@
       })()
     </script>
     <title>PilotVault — Control Panel</title>
-    <script type="module" crossorigin src="./assets/index-Dk_VY0uv.js"></script>
-    <link rel="stylesheet" crossorigin href="./assets/index-Bvd5MzZB.css">
+    <script type="module" crossorigin src="./assets/index-CYlCe7LJ.js"></script>
+    <link rel="stylesheet" crossorigin href="./assets/index-Cy2Ed59q.css">
   </head>
   <body>
     <div id="app"></div>