ci: regenerate the i18n types and check them for drift (#8494)

.github/workflows/frontend-check.yml

@@ -4,6 +4,7 @@ on:
   pull_request:
     paths:
       - "src/**"
+      - "scripts/**"
       - "**/*.js"
       - "**/*.ts"
       - "**/*.tsx"
@@ -41,6 +42,14 @@ jobs:
 
       - run: pnpm install --frozen-lockfile
 
+      - name: Check generated i18n types are up to date
+        run: |
+          pnpm i18n:types
+          if ! git diff --exit-code -- src/types/generated; then
+            echo "::error::src/types/generated is stale; run pnpm i18n:types and commit the result"
+            exit 1
+          fi
+
       - name: Run Prettier check
         run: pnpm format:check