Refine category select tree gutters and tighten activity charts.

Restore RTL tree lines in category dropdowns, require product category on add, and improve chart bar density with Y-axis tooltips.

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

apps/business/src/pages/AddNewProductPage.tsx

@@ -191,6 +191,12 @@ export function AddNewProductPage() {
     setIsSubmitting(true)
     setError('')
 
+    if (!categoryId) {
+      setError(t('products.form.errorCategory'))
+      setIsSubmitting(false)
+      return
+    }
+
     try {
       const featuredMediaId = await resolveDataUrlToMediaId(
         thumbnail,
@@ -292,6 +298,7 @@ export function AddNewProductPage() {
                   value={categoryId}
                   onChange={setCategoryId}
                   placeholder={t('products.form.categoryPlaceholder')}
+                  allowEmpty={false}
                 />
               </div>