v2: global player, infinite scroll, image picker, threaded comments

src/contexts/AuthProvider.tsx

@@ -4,11 +4,27 @@ import { AuthContext, type AuthContextValue } from "./AuthContext.ts";
 
 import { type AuthResponse, deserializeAuthResponse } from "../model.ts";
 
+function isTokenExpired(token: string): boolean {
+  try {
+    const payload = JSON.parse(atob(token.split(".")[1]));
+    return typeof payload.exp === "number" && payload.exp * 1000 < Date.now();
+  } catch {
+    return true;
+  }
+}
+
 export function AuthProvider({ children }: { children: ReactNode }) {
   const [authResponse, setAuthResponse] = useState<AuthResponse | null>(() => {
     const stored = localStorage.getItem("authResponse");
+    if (!stored) return null;
 
-    return stored ? deserializeAuthResponse(JSON.parse(stored)) : null;
+    const parsed = deserializeAuthResponse(JSON.parse(stored));
+    if (isTokenExpired(parsed.token)) {
+      localStorage.removeItem("authResponse");
+      return null;
+    }
+
+    return parsed;
   });
 
   const value: AuthContextValue = { authResponse, setAuthResponse };