AI desktop path: plain-HTML Review and Cost tabs over the Qt bridge, gate in Python

ai_sections.html pastes into the no-AI dashboard.html; ai_bridge.py adds one
ai_request slot that hands every AI contract request (incl. GET /roi) to the
review backend's dispatch(). Desktop page check reruns the web review and cost
cases plus a tampered-page gate case. Eval fixture e-pyqt-ai added.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/page_check_ai_desktop/conftest.py

@@ -63,7 +63,7 @@ def site(tmp_path_factory):
     sections = (AI / "desktop" / "ai_sections.html").read_text(encoding="utf-8")
     out = tmp_path_factory.mktemp("desktop")
     (out / "dashboard.html").write_text(html.replace("</body>", sections + "\n</body>"), encoding="utf-8")
-    for f in ["server_stub.py", "bands.py"]:
+    for f in ["server_stub.py", "bands.py", "pricing.py"]:
         (out / f).write_bytes((AI / "web" / f).read_bytes())
     return out