Update favicon and enhance UI components for improved user experience

- Replaced PNG favicon with SVG for better scalability and visual quality across devices.
- Updated Vite configuration to include the new SVG favicon and adjusted asset paths.
- Enhanced various UI components with improved focus management and accessibility features.
- Introduced new styles to hide scrollbars while maintaining scroll functionality for a cleaner interface.

neode-ui/src/stores/spotlight.ts

@@ -70,8 +70,10 @@ export const useSpotlightStore = defineStore('spotlight', () => {
     content: '',
     relatedPath: undefined as string | undefined,
   })
+  const helpModalRestoreFocusRef = ref<HTMLElement | null>(null)
 
   function showHelpModal(payload: { title: string; content: string; relatedPath?: string }) {
+    helpModalRestoreFocusRef.value = document.activeElement as HTMLElement | null
     helpModal.show = true
     helpModal.title = payload.title
     helpModal.content = payload.content
@@ -79,6 +81,8 @@ export const useSpotlightStore = defineStore('spotlight', () => {
   }
 
   function closeHelpModal() {
+    helpModalRestoreFocusRef.value?.focus?.()
+    helpModalRestoreFocusRef.value = null
     helpModal.show = false
   }