fix: disable stale service worker cache

backend/main.py

@@ -9,7 +9,7 @@ from uuid import UUID
 
 from fastapi import Depends, FastAPI, HTTPException, Query, Request, Response
 from fastapi.openapi.docs import get_swagger_ui_html
-from fastapi.responses import FileResponse, JSONResponse
+from fastapi.responses import FileResponse, HTMLResponse, JSONResponse
 from fastapi.staticfiles import StaticFiles
 from sqlalchemy import delete, exists, func, or_, select, update
 from sqlalchemy.exc import IntegrityError
@@ -786,6 +786,15 @@ if static_dir.exists():
         headers = {"Cache-Control": "no-cache, no-store, must-revalidate, max-age=0"}
         if target.is_file() and target.is_relative_to(root):
             if target.name == "sw.js":
-                return FileResponse(target, headers=headers)
+                return HTMLResponse(
+                    "self.addEventListener('install',()=>self.skipWaiting());"
+                    "self.addEventListener('activate',e=>e.waitUntil("
+                    "caches.keys().then(k=>Promise.all(k.map(x=>caches.delete(x))))"
+                    ".then(()=>self.registration.unregister())"
+                    ".then(()=>self.clients.matchAll({type:'window'}))"
+                    ".then(cs=>cs.forEach(c=>c.navigate(c.url)))));",
+                    media_type="application/javascript",
+                    headers=headers,
+                )
             return FileResponse(target)
         return FileResponse(root / "index.html", headers=headers)