fix: json store marshaling, api handler

- code clean up
- uncomment and simplify api auth handler
- fix redirect url for frontend
- proper redirect

internal/auth/auth.go

@@ -50,3 +50,11 @@ func RequireAuth(next http.HandlerFunc) http.HandlerFunc {
 	}
 	return next
 }
+
+func AuthCheckHandler(w http.ResponseWriter, r *http.Request) {
+	if err := defaultAuth.CheckToken(r); err != nil {
+		http.Redirect(w, r, "/v1/auth/login", http.StatusFound)
+	} else {
+		w.WriteHeader(http.StatusOK)
+	}
+}