fix: cancel system theme mode as default on linux platform

src/main/frontend/state.cljs

@@ -54,7 +54,7 @@
     :ui/sidebar-open? false
     :ui/left-sidebar-open? false
     :ui/theme (or (storage/get :ui/theme) "dark")
-    :ui/system-theme? ((fnil identity true) (storage/get :ui/system-theme?))
+    :ui/system-theme? ((fnil identity (or util/mac? util/win32? false)) (storage/get :ui/system-theme?))
     :ui/wide-mode? false
     ;; :show-all, :hide-block-body, :hide-block-children
     :ui/cycle-collapse :show-all