tests: pin ink engine in _make_tui_argv npm-bootstrap tests (post-merge semantic fix)

Main's rewritten test_tui_npm_install.py tests call _make_tui_argv expecting
the Ink/npm flow unconditionally; with the dual-engine dispatch merged in,
_resolve_tui_engine() auto-selects opentui whenever ui-opentui/dist is built
in the repo, routing the call away from the path under test (first subprocess
became 'node --version' instead of 'npm run build'). Pin the engine to ink
via an autouse fixture, mirroring the existing pinning precedent in
test_tui_resume_flow.py.

apps/desktop/tsconfig.json

@@ -1,8 +1,8 @@
 {
   "compilerOptions": {
-    "target": "ES2022",
+    "target": "ES2023",
     "useDefineForClassFields": true,
-    "lib": ["DOM", "DOM.Iterable", "ES2022"],
+    "lib": ["DOM", "DOM.Iterable", "ES2023"],
     "allowJs": false,
     "skipLibCheck": true,
     "esModuleInterop": true,