fix: Dropdown menus rendering outside SPA container

- Add getPortalContainer to DropdownMenuContent (like Dialog)
- Portal container created inside #woonoow-admin-app
- Copy theme class (light/dark) for proper CSS variable inheritance
- Fixes Add Section dropdown styling in Page Editor

admin-spa/src/components/ui/dropdown-menu.tsx

@@ -57,20 +57,46 @@ DropdownMenuSubContent.displayName =
 const DropdownMenuContent = React.forwardRef<
   React.ElementRef<typeof DropdownMenuPrimitive.Content>,
   React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Content>
->(({ className, sideOffset = 4, ...props }, ref) => (
-  <DropdownMenuPrimitive.Portal>
-    <DropdownMenuPrimitive.Content
-      ref={ref}
-      sideOffset={sideOffset}
-      className={cn(
-        "z-50 max-h-[var(--radix-dropdown-menu-content-available-height)] min-w-[8rem] overflow-y-auto overflow-x-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md",
-        "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 origin-[--radix-dropdown-menu-content-transform-origin]",
-        className
-      )}
-      {...props}
-    />
-  </DropdownMenuPrimitive.Portal>
-))
+>(({ className, sideOffset = 4, ...props }, ref) => {
+  // Get or create portal container inside the app for proper CSS scoping
+  const getPortalContainer = () => {
+    const appContainer = document.getElementById('woonoow-admin-app');
+    if (!appContainer) return document.body;
+
+    let portalRoot = document.getElementById('woonoow-dropdown-portal');
+    if (!portalRoot) {
+      portalRoot = document.createElement('div');
+      portalRoot.id = 'woonoow-dropdown-portal';
+      // Copy theme class from documentElement for proper CSS variable inheritance
+      const themeClass = document.documentElement.classList.contains('dark') ? 'dark' : 'light';
+      portalRoot.className = themeClass;
+      appContainer.appendChild(portalRoot);
+    } else {
+      // Update theme class in case it changed
+      const themeClass = document.documentElement.classList.contains('dark') ? 'dark' : 'light';
+      if (!portalRoot.classList.contains(themeClass)) {
+        portalRoot.classList.remove('light', 'dark');
+        portalRoot.classList.add(themeClass);
+      }
+    }
+    return portalRoot;
+  };
+
+  return (
+    <DropdownMenuPrimitive.Portal container={getPortalContainer()}>
+      <DropdownMenuPrimitive.Content
+        ref={ref}
+        sideOffset={sideOffset}
+        className={cn(
+          "z-50 max-h-[var(--radix-dropdown-menu-content-available-height)] min-w-[8rem] overflow-y-auto overflow-x-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md",
+          "data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 origin-[--radix-dropdown-menu-content-transform-origin]",
+          className
+        )}
+        {...props}
+      />
+    </DropdownMenuPrimitive.Portal>
+  );
+})
 DropdownMenuContent.displayName = DropdownMenuPrimitive.Content.displayName
 
 const DropdownMenuItem = React.forwardRef<