feat(dependencies): keep the staged changes footer in view

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: talissoncosta

frontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/ChangeRequestFooter/ChangeRequestFooter.scss

@@ -0,0 +1,7 @@
+// Pinned to the bottom of the tab, so the way out stays in view however long
+// the table gets. No z-index utility on Bootstrap 5.2, and the token border
+// utilities lose to Bootstrap's border colour.
+.change-request-footer {
+  z-index: 1;
+  border-top: 1px solid var(--color-border-default);
+}

…eDependenciesTab/ChangeRequestFooter.tsx …ngeRequestFooter/ChangeRequestFooter.tsxfrontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/ChangeRequestFooter.tsx renamed to frontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/ChangeRequestFooter/ChangeRequestFooter.tsx frontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/ChangeRequestFooter.tsx renamed to frontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/ChangeRequestFooter/ChangeRequestFooter.tsx

@@ -1,5 +1,6 @@
 import { FC } from 'react'
 import Button from 'components/base/forms/Button'
+import './ChangeRequestFooter.scss'
 
 type ChangeRequestFooterProps = {
   count: number
@@ -14,14 +15,14 @@ const ChangeRequestFooter: FC<ChangeRequestFooterProps> = ({
   onCreate,
   onDiscard,
 }) => (
-  <div className='d-flex align-items-center gap-2 mt-3'>
-    <span className='text-secondary me-auto'>
+  <div className='change-request-footer position-sticky bottom-0 d-flex align-items-center gap-2 mt-3 py-3 bg-surface-default'>
+    <span className='text-secondary me-auto' aria-live='polite'>
       {count} {count === 1 ? 'change' : 'changes'} staged
     </span>
     <Button theme='secondary' onClick={onDiscard} disabled={isSubmitting}>
       Discard changes
     </Button>
-    <Button onClick={onCreate} isLoading={isSubmitting} disabled={isSubmitting}>
+    <Button onClick={onCreate} isLoading={isSubmitting}>
       Create Change Request
     </Button>
   </div>

frontend/web/components/modals/create-feature/tabs/FeatureDependenciesTab/ChangeRequestFooter/index.ts

@@ -0,0 +1 @@
+export { default } from './ChangeRequestFooter'