UHeader `mode="slideover"` + `toggle-side="left"` + `:menu="{ side: 'left' }"` causes two bugs:

[Satochi001]

Environment

• Nuxt 4
• @nuxt/ui latest

Reproduction

Minimal reproduction

<template>
  <UHeader
    title="Travel Now"
    toggle-side="left"
    mode  ="slideover"
    

    :toggle="{
      color: 'primary',
      variant: 'subtle',
    }",
    :menu="{ 
  side: 'left',
  
}"


    
    
    class="text-white"
  >
    <template #title>
      <Logo class="h-8 w-auto" />
    </template>

    <template #right>
      <UColorModeButton />
      <UButton to="" color="neutral" variant="ghost" >
        Add place
      </UButton>
    </template>



    

        <template #body>
      <UNavigationMenu :items="items" orientation="vertical" class="-mx-2.5 w-50 max-h-80"  color="success"   />
    </template>

    
  </UHeader>

  <UMain>
    <slot />
  </UMain>

  <UFooter />
</template>

### Describe the bug

1. Right-side header buttons are duplicated inside the slideover panel  
2. Impossible to reduce slideover height / make it start below header (always full-screen from top=0)



**Bug 1 – Duplicated buttons**  
All content from the `#right` slot is automatically copied into the slideover body when it opens, even though I only put my navigation in `#body`.


**Bug 2 – Cannot control height / offset**  
No matter what I try:
- `:menu="{ ui: { content: '...' } }"`
- `app.config.ts` header variants
- `#content` slot with custom classes

.

### Additional context

The slideover always goes from `top: 0` to bottom of screen (full viewport height) and **ignores** any `mt-[--ui-header-height]`, `h-[calc(...)]`, `max-h-*`, etc.  
I want the slideover to start **directly below the header** (so the header stays visible) and take only the remaining screen height


### Logs

```shell-script

[Satochi001]

Trying to add an image here

[Satochi001]

I just realised that the inbuilt Uheader menu mode-slider cannot be customised, so I decided to customise mine from scratch, but it would be nice- if we can be able to edit or customise the inbuilt version.