chore: retire react-demo (retire-react-demo)

CLAUDE.md

@@ -22,7 +22,6 @@ apps/
   meeting-notes/         # meeting-notes clients
   trace-explorer/
     web-react/           # Trace Explorer — execution timeline debugger
-  react-demo/            # Expedition React browser demo (adopted from Traverse)
   browser-consumer/      # Browser consumer façade
   android-demo/          # Expedition Android demo
   youaskm3-starter-kit/  # Downstream browser starter kit

README.md

@@ -27,14 +27,14 @@ UI examples for [Traverse](https://github.com/traverse-framework/Traverse).
 
 | Demo | Path |
 |---|---|
-| React browser demo | [`apps/react-demo/`](apps/react-demo/) |
 | Browser consumer façade | [`apps/browser-consumer/`](apps/browser-consumer/) |
 | youaskm3 starter kit | [`apps/youaskm3-starter-kit/`](apps/youaskm3-starter-kit/) |
 
 ### Retired demos
 
 | Path | Retired | Notes |
 |---|---|---|
+| `apps/react-demo` | 2026-08-12 | Spec 004 retire ([#255](https://github.com/traverse-framework/reference-apps/pull/255)); use primary Web shells / browser-consumer |
 | `apps/android-demo` | 2026-08-12 | Spec 004 retire ([#251](https://github.com/traverse-framework/reference-apps/pull/251)); use primary Android Compose shells |
 | `apps/macos-demo` | 2026-08-12 | Spec 004 retire ([#252](https://github.com/traverse-framework/reference-apps/pull/252)); use primary SwiftUI shells |