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/tests/config.test.ts

@@ -9,6 +9,7 @@ describe('Config Types', () => {
 
     it('StationConfig has correct shape', () => {
         const config: StationConfig = {
+            id: 'times-sq',
             stationId: '127',
             stationName: 'Times Sq-42 St',
             showNorth: true,
@@ -28,6 +29,7 @@ describe('Config Types', () => {
             version: CONFIG_VERSION,
             stations: [
                 {
+                    id: 'times-sq',
                     stationId: '127',
                     stationName: 'Times Sq-42 St',
                     showNorth: true,
@@ -47,6 +49,7 @@ describe('Config Types', () => {
             version: CONFIG_VERSION,
             stations: [
                 {
+                    id: 'times-sq',
                     stationId: '127',
                     stationName: 'Times Sq-42 St',
                     showNorth: true,
@@ -54,6 +57,7 @@ describe('Config Types', () => {
                     selectedLines: ['1', '2', '3'],
                 },
                 {
+                    id: 'port-authority',
                     stationId: 'A27',
                     stationName: '42 St-Port Authority',
                     showNorth: false,