chore(deps): update UI deps; vitest 5 + jsdom 31 + plugin-react 6

next 16.4.6 / react 19.3.1 and other minors. Add missing StationConfig.id
to config test fixtures (newer next build type-checks tests/).
Tailwind v4 and TS 7 intentionally held.

mta-sign-ui/pnpm-workspace.yaml

@@ -2,3 +2,5 @@ allowBuilds:
   esbuild: true
   sharp: true
   unrs-resolver: true
+minimumReleaseAgeExclude:
+  - bootstrap@5.3.9