feat(ui): keep the active operations tab across page refreshes (#27)

Persist the selected tab ID to localStorage (sw-active-tab) on every change
and restore it on mount when it matches one of the seven valid tab IDs. The
Radix Tabs become controlled for this; SSR and first client render still agree
on the default, so there is no hydration mismatch.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "space-wanderer",
-  "version": "0.9.5",
+  "version": "0.9.6",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",