Merge branch 'v0.13.0rc' into feat/react-query

Merged latest changes from v0.13.0rc into feat/react-query while preserving
React Query migration. Key merge decisions:

- Kept React Query hooks for data fetching (useRunningAgents, useStopFeature, etc.)
- Added backlog plan handling to running-agents-view stop functionality
- Imported both SkeletonPulse and Spinner for CLI status components
- Used Spinner for refresh buttons across all settings sections
- Preserved isBacklogPlan check in agent-output-modal TaskProgressPanel
- Added handleOpenInIntegratedTerminal to worktree actions while keeping React Query mutations

apps/ui/src/components/views/board-view/dialogs/create-pr-dialog.tsx

@@ -13,7 +13,8 @@ import { Textarea } from '@/components/ui/textarea';
 import { Label } from '@/components/ui/label';
 import { Checkbox } from '@/components/ui/checkbox';
 import { BranchAutocomplete } from '@/components/ui/branch-autocomplete';
-import { GitPullRequest, Loader2, ExternalLink } from 'lucide-react';
+import { GitPullRequest, ExternalLink } from 'lucide-react';
+import { Spinner } from '@/components/ui/spinner';
 import { getElectronAPI } from '@/lib/electron';
 import { toast } from 'sonner';
 import { useWorktreeBranches } from '@/hooks/queries';
@@ -384,7 +385,7 @@ export function CreatePRDialog({
               <Button onClick={handleCreate} disabled={isLoading}>
                 {isLoading ? (
                   <>
-                    <Loader2 className="w-4 h-4 mr-2 animate-spin" />
+                    <Spinner size="sm" className="mr-2" />
                     Creating...
                   </>
                 ) : (