0.16.1: welcome screen arrow-key navigation

Up/Down arrow keys now move focus through the recents list in the
welcome dialog; Home/End jump to the first/last entry. Tab / Enter
/ Space behaviour is untouched — arrows are additive. Covered by
two UI tests (arrow roundtrip + Home/End) that poll for the async
IDB load instead of a fixed delay.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "ruwio",
   "private": true,
-  "version": "0.16.0",
+  "version": "0.16.1",
   "type": "module",
   "scripts": {
     "dev": "vite",