- Render a composed "no categories found" panel when the category tree
resolves to an empty array, so vehicles without a catalog stop showing
a silent void under "Yedek Parça Kategorileri".
- Collapse the equipment list to the first 8 codes by default with a
"Tümünü göster (N)" toggle instead of a sub-scrollarea — friendlier
on mobile, no card-in-card scroll.
- Loosen the header flex layout: the title block gets `min-w-0 flex-1`
with break-words and a truncated VIN line so long brand+model strings
no longer crush the layout on narrow screens.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>