fix(settings): open the right Settings tab from the update link and Race Day

The sidebar update notice now lands on System & backup at Updates, and
Race Day's decoder/backend/audio fix buttons open the matching tab,
instead of whichever tab was used last.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rc-racecore",
-  "version": "1.31.0",
+  "version": "1.31.1",
   "private": true,
   "description": "RC RaceCore live timing and race control with AMMC ingest and SQLite persistence",
   "engines": {