test: fix all 10 failing frontend tests

Updated appLauncher tests to match current session-based routing.
Fixed settings test to use h2 instead of h1. Fixed RPC client test
to expect 'Session expired' on 401.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/api/__tests__/rpc-client.test.ts

@@ -98,7 +98,7 @@ describe('RPCClient', () => {
   it('throws immediately on non-retryable HTTP errors (e.g. 401)', async () => {
     mockFetch.mockResolvedValueOnce(jsonResponse(null, 401, 'Unauthorized'))
 
-    await expect(rpcClient.call({ method: 'test' })).rejects.toThrow('HTTP 401: Unauthorized')
+    await expect(rpcClient.call({ method: 'test' })).rejects.toThrow('Session expired')
     expect(mockFetch).toHaveBeenCalledOnce()
   })