Revert "feat(ui): make dashboard responsive for iPhone and mobile devices"

This reverts commit d3b326e.

The deployment caused reports of blank screens and 400 errors. Reverting to restore stable state while investigating root cause.

apps/web/components/tenant-selector.tsx

@@ -53,14 +53,14 @@ export function TenantSelector() {
       <button
         onClick={() => setOpen(!open)}
         className={cn(
-          'flex items-center gap-2 rounded-lg px-2 py-2 text-sm font-medium transition-colors sm:px-3',
+          'flex items-center gap-2 rounded-lg px-3 py-2 text-sm font-medium transition-colors',
           isViewingOther
             ? 'bg-primary/10 text-primary border border-primary/30'
             : 'hover:bg-accent'
         )}
       >
         <Building className="h-4 w-4" />
-        <span className="hidden max-w-[150px] truncate sm:inline">{displayName}</span>
+        <span className="max-w-[150px] truncate">{displayName}</span>
         {isViewingOther && (
           <span
             role="button"