Refactor environment variable declarations and update asset references in SvelteKit project. Removed unused variables and updated client entry points and stylesheets for improved performance.

node_modules/.vite/deps/svelte_transition.js

@@ -1,7 +1,9 @@
 import {
-  transition_slide_display,
+  transition_slide_display
+} from "./chunk-XWATFG4W.js";
+import {
   true_default
-} from "./chunk-VZQZA5WB.js";
+} from "./chunk-HNWPC2PS.js";
 import "./chunk-X4VJQ2O3.js";
 
 // node_modules/svelte/src/transition/index.js