Long text boxes in forms don't maintain their expanded size

Author: bram2w

changelog/entries/unreleased/bug/3801_long_text_fields_in_form_expanded_size_is_reverted.json

@@ -0,0 +1,8 @@
+{
+    "type": "bug",
+    "message": "Long text boxes in forms don't maintain their expanded size.",
+    "domain": "database",
+    "issue_number": 3801,
+    "bullet_points": [],
+    "created_at": "2025-08-29"
+}

web-frontend/modules/core/assets/scss/components/form_textarea.scss

@@ -31,3 +31,7 @@
   color: $palette-neutral-700;
   box-shadow: none;
 }
+
+.form-textarea--auto-expendable {
+  resize: none;
+}

web-frontend/modules/core/components/FormTextarea.vue

@@ -11,10 +11,11 @@
       'form-textarea--error': error,
       'form-textarea--disabled': disabled,
       'form-textarea--small': size === 'small',
+      'form-textarea--auto-expendable': autoExpandable,
     }"
     :style="{
-      height: textBoxSize ? `${textBoxSize}px` : 'auto',
       overflow: textBoxOverflow ? textBoxOverflow : 'visible',
+      ...heightStyle,
     }"
     @blur="$emit('blur', $event)"
     @focus="$emit('focus', $event)"
@@ -142,6 +143,14 @@ export default {
         return this.numTextAreaLines > this.maxRows ? 'auto' : 'hidden'
       return null
     },
+    heightStyle() {
+      if (this.textBoxSize) {
+        return {
+          height: `${this.textBoxSize}px`,
+        }
+      }
+      return null
+    },
   },
   watch: {
     value() {