Fix icon routing and prevent SPA fallback on asset paths

backend/main.py

@@ -298,11 +298,15 @@ if STATIC_DIR.exists():
     app.mount("/assets", StaticFiles(directory=STATIC_DIR / "assets"), name="assets")
 if PUBLIC_DIR.exists():
     app.mount("/static", StaticFiles(directory=PUBLIC_DIR), name="public")
+elif STATIC_DIR.exists():
+    app.mount("/static", StaticFiles(directory=STATIC_DIR), name="public-dist")
 
 
 @app.get("/jellomator.png")
 def root_icon():
     icon = PUBLIC_DIR / "jellomator.png"
+    if not icon.exists():
+        icon = STATIC_DIR / "jellomator.png"
     if not icon.exists():
         raise HTTPException(404, "Not found")
     return FileResponse(icon)
@@ -312,6 +316,8 @@ def root_icon():
 def spa(path: str):
     if path.startswith("api/"):
         raise HTTPException(404)
+    if "." in path:
+        raise HTTPException(404)
     index = STATIC_DIR / "index.html"
     if index.exists():
         return FileResponse(index)