feat(phase4): permanent cache-control & asset versioning, canonical nabil stored_session_id & resume, dsh session persistence fix, dsh dialogue/files toggle, and collapsible conv sidebar

app/main.py

@@ -1,10 +1,11 @@
 from fastapi import FastAPI, Request, WebSocket, WebSocketDisconnect
-from fastapi.responses import HTMLResponse
+from fastapi.responses import HTMLResponse, Response
 from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
 from pathlib import Path
 from typing import Optional, Tuple
 from contextlib import asynccontextmanager
+import time
 
 from app.config import settings, UNIVERSES, BASE_DIR
 from app.routers import api, proxy, chat
@@ -12,6 +13,8 @@ from app.proxy import close_http_client, proxy_request, proxy_websocket
 from app.personas import ensure_dirs
 from app.db import init_db
 
+APP_VERSION = f"2.1.{int(time.time())}"
+
 def get_subdomain_target(host: str) -> Optional[Tuple[str, str]]:
     """
     Inspects Host header and returns (target_backend_url, universe_id) if it matches a universe hostname.
@@ -22,7 +25,7 @@ def get_subdomain_target(host: str) -> Optional[Tuple[str, str]]:
       perso-hub.yesminedor.tn    -> (HERMES_PERSO_URL, 'perso')
       nabil-hub.yesminedor.tn    -> (HERMES_NABIL_URL, 'nabil')
       dsh-hub.yesminedor.tn      -> (HERMES_DSH_URL, 'dsh')
-      files-hub.yesminedor.tn    -> (DSH_FILEBROWSER_URL, 'nabil')
+      files-hub.yesminedor.tn    -> (DSH_FILEBROWSER_URL, 'dsh')
     
     Apex / Hub UI:
       hub.yesminedor.tn          -> None (Serves index.html Workspace Switcher)
@@ -54,7 +57,7 @@ def get_subdomain_target(host: str) -> Optional[Tuple[str, str]]:
         return None
     
     if sub in ("files", "dsh-files"):
-        return (settings.dsh_filebrowser_url, "nabil")
+        return (settings.dsh_filebrowser_url, "dsh")
     
     if sub in UNIVERSES:
         return (UNIVERSES[sub].backend_url, sub)
@@ -70,10 +73,21 @@ async def lifespan(app: FastAPI):
 
 app = FastAPI(
     title=settings.app_name,
-    version="1.0.0",
+    version="2.1.0",
     lifespan=lifespan
 )
 
+# Cache-Control & Anti-Stale Middleware for Hub UI & Statics
+@app.middleware("http")
+async def cache_control_middleware(request: Request, call_next):
+    response: Response = await call_next(request)
+    path = request.url.path
+    if path.startswith("/static/") or path == "/" or path.endswith(".html"):
+        response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate, max-age=0"
+        response.headers["Pragma"] = "no-cache"
+        response.headers["Expires"] = "0"
+    return response
+
 # Subdomain Routing Middleware for HTTP
 @app.middleware("http")
 async def subdomain_routing_middleware(request: Request, call_next):
@@ -112,7 +126,8 @@ async def index_view(request: Request):
         name="index.html",
         context={
             "universes": UNIVERSES,
-            "app_name": settings.app_name
+            "app_name": settings.app_name,
+            "version": APP_VERSION
         }
     )