Fix hardcoded Rails direct_upload URLs in Vue upload components

Replace '/rails/active_storage/direct_uploads' with GoChat endpoint
'/api/v1/widget/direct_uploads' in two dashboard upload components:
- ActionButtons.vue (new conversation attachment upload)
- ReplyBottomPanel.vue (conversation reply attachment upload)

These data attributes are consumed by vue-upload-component; the actual
upload logic in useFileUpload/fileUploadMixin already used the correct
GoChat endpoints. Spotted by decoupling audit report.

frontend/app/javascript/dashboard/components-next/NewConversation/components/ActionButtons.vue

@@ -230,7 +230,7 @@ useEventListener(document, 'paste', onPaste);
         multiple
         :drop-directory="false"
         :data="{
-          direct_upload_url: '/rails/active_storage/direct_uploads',
+          direct_upload_url: '/api/v1/widget/direct_uploads',
           direct_upload: true,
         }"
         class="p-px"

frontend/app/javascript/dashboard/components/widgets/WootWriter/ReplyBottomPanel.vue

@@ -298,7 +298,7 @@ export default {
         :drop="enableDragAndDrop"
         :drop-directory="false"
         :data="{
-          direct_upload_url: '/rails/active_storage/direct_uploads',
+          direct_upload_url: '/api/v1/widget/direct_uploads',
           direct_upload: true,
         }"
         @input-file="onFileUpload"