docs: consolidate English documentation under root docs

s2s-client/server.py

@@ -54,7 +54,7 @@ import httpx
 import websockets
 from dotenv import load_dotenv
 from fastapi import FastAPI, HTTPException, Request, WebSocket, WebSocketDisconnect
-from fastapi.responses import JSONResponse
+from fastapi.responses import JSONResponse, RedirectResponse
 from fastapi.staticfiles import StaticFiles
 from pydantic import BaseModel
 
@@ -6696,6 +6696,19 @@ async def no_cache_static_assets(request: Request, call_next):
     return response
 
 
+# Preserve the former proposal URLs after moving the document out of the client.
+@app.get("/project", include_in_schema=False)
+@app.get("/project/", include_in_schema=False)
+@app.get("/project/index.html", include_in_schema=False)
+@app.get("/public/docs.html", include_in_schema=False)
+async def project_documentation():
+    return RedirectResponse("/docs/proposals/vocero-architecture.html", status_code=307)
+
+
+# The existing FastAPI /docs page remains registered ahead of this mount.
+app.mount("/docs", StaticFiles(directory=os.path.join(ROOT_DIR, "docs"), html=True), name="documentation")
+
+
 # Static front-end. Registered last so the /api routes win. `html=True` serves
 # index.html at "/". The repo is public anyway, so serving the dir is fine.
 app.mount("/", StaticFiles(directory=HERE, html=True), name="static")