Add cache invalidation to all project/round mutations platform-wide

Mutations for create, update, delete, import, filtering finalize,
override, and reinstate now properly invalidate related queries so
the UI updates without requiring a page refresh.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(admin)/admin/projects/[id]/edit/page.tsx

@@ -125,14 +125,19 @@ function EditProjectContent({ projectId }: { projectId: string }) {
   })
 
   // Mutations
+  const utils = trpc.useUtils()
   const updateProject = trpc.project.update.useMutation({
     onSuccess: () => {
+      utils.project.get.invalidate({ id: projectId })
+      utils.project.list.invalidate()
       router.push(`/admin/projects/${projectId}`)
     },
   })
 
   const deleteProject = trpc.project.delete.useMutation({
     onSuccess: () => {
+      utils.project.list.invalidate()
+      utils.round.get.invalidate()
       router.push('/admin/projects')
     },
   })