refactor: remove dead code, complete quality sweep (FINAL-03)

- Remove unused _restartApp in Apps.vue
- Remove unused version computed in Home.vue
- Remove unused filteredCommunityApps in Marketplace.vue
- All metrics clean: 0 type errors, 0 build warnings, 515/515 tests pass

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/views/Apps.vue

@@ -416,16 +416,6 @@ onBeforeUnmount(() => {
   actionTimers.clear()
 })
 
-// @ts-ignore - Function kept for future use
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-async function _restartApp(_id: string) {
-  try {
-    await store.restartPackage(_id)
-  } catch (err) {
-    if (import.meta.env.DEV) console.error('Failed to restart app:', err)
-  }
-}
 
 function showUninstallModal(id: string, pkg: PackageDataEntry) {
   uninstallModal.value = {