refactor: implement smart navigation for "Get Mycelium Connector" button with smooth scroll utility

- Added smoothScrollToElement utility function in src/utils/scroll.ts with easeInOutQuad animation and configurable duration
- Changed Header and HeaderDark "Get Mycelium Connector" button from static /download link to onClick handler with conditional navigation
- Added handleGetConnectorClick function that scrolls to #download section when on /network page, otherwise navigates to /network
- Change

src/pages/nodes/NodeHero.tsx

@@ -2,6 +2,7 @@
 
 import { Button } from '@/components/Button'
 import { Eyebrow, H3, P } from '@/components/Texts'
+import { smoothScrollToElement } from '@/utils/scroll'
 
 export function NodeHero() {
   return (
@@ -31,12 +32,7 @@ export function NodeHero() {
               <Button
                 variant="solid"
                 color="cyan"
-                onClick={() => {
-                  const el = document.getElementById('node-how-it-works')
-                  if (el) {
-                    el.scrollIntoView({ behavior: 'smooth', block: 'start' })
-                  }
-                }}
+                onClick={() => smoothScrollToElement('node-how-it-works', 1200)}
               >
                 How it works
               </Button>