Improve boursecu UX: banners, support FAB, wallet deposit guide, fund/physical layouts, nav, and sidebar credit.

Co-authored-by: Cursor <cursoragent@cursor.com>

index.html

@@ -33,15 +33,19 @@
       body {
           margin: 0;
           min-height: 100%;
+          width: 100%;
           background: var(--boot-bg);
       }
 
       #app {
           min-height: 100vh;
+          width: 100%;
+          max-width: none;
       }
 
       .boot-loader {
           min-height: 100vh;
+          width: 100%;
           display: flex;
           align-items: center;
           justify-content: center;
@@ -85,13 +89,22 @@
           display: block !important;
         }
       }
+      #app,
+      .boot-loader {
+        width: 100% !important;
+        max-width: none !important;
+      }
       .app-splash-screen {
-        position: fixed;
-        inset: 0;
-        width: 100vw;
-        min-height: 100vh;
+        position: fixed !important;
+        inset: 0 !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+        max-width: none !important;
+        min-height: 100vh !important;
         left: 0 !important;
         right: 0 !important;
+        margin: 0 !important;
+        transform: none !important;
         z-index: 2147483646;
       }
   </style>