test: cover hazard severity labels

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

h5-app/src/tests/hazard-mappers.test.ts

@@ -25,7 +25,7 @@ describe('severityFromLabel', () => {
   })
 
   it('重大 → major', () => {
-    expect(severityFromLabel('major')).toBe('general')
+    expect(severityFromLabel('重大')).toBe('major')
   })
 
   it('unknown input falls back to general', () => {