UX: Only scroll when we surpass max input height

Author: janzenisaac

assets/javascripts/discourse/controllers/discourse-ai-bot-conversations.js

@@ -48,5 +48,15 @@ export default class DiscourseAiBotConversations extends Controller {
   _autoExpandTextarea() {
     this.textarea.style.height = "auto";
     this.textarea.style.height = this.textarea.scrollHeight + "px";
+
+    // Get the max-height value from CSS (30vh)
+    const maxHeight = parseInt(getComputedStyle(this.textarea).maxHeight, 10);
+
+    // Only enable scrolling if content exceeds max-height
+    if (this.textarea.scrollHeight > maxHeight) {
+      this.textarea.style.overflowY = "auto";
+    } else {
+      this.textarea.style.overflowY = "hidden";
+    }
   }
 }

assets/stylesheets/modules/ai-bot-conversations/common.scss

@@ -240,7 +240,7 @@ body.has-ai-conversations-sidebar {
         resize: none;
         border-radius: var(--d-button-border-radius);
         max-height: 30vh;
-        overflow: hidden;
+        overflow-y: hidden;
 
         &:focus {
           outline: none;