prevent search/cart link navigation when JS modal is active

Without JS the header icons are plain <a> links to /search and /cart.
With LiveView connected, the hooks now preventDefault on those links
so only the modal/drawer opens.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

assets/js/app.js

@@ -73,6 +73,13 @@ const CartDrawer = {
     this.scrollY = 0
     this.isOpen = this.el.classList.contains('open')
 
+    // Prevent the cart link from navigating when the drawer is available
+    this._cartTrigger = document.querySelector('a[aria-label="Cart"]')
+    if (this._cartTrigger) {
+      this._preventNav = (e) => e.preventDefault()
+      this._cartTrigger.addEventListener("click", this._preventNav)
+    }
+
     if (this.isOpen) {
       this.lockScroll()
       document.addEventListener('keydown', this.boundKeydown)
@@ -187,6 +194,9 @@ const CartDrawer = {
   destroyed() {
     document.removeEventListener('keydown', this.boundKeydown)
     document.removeEventListener('touchmove', this.boundTouchmove)
+    if (this._cartTrigger && this._preventNav) {
+      this._cartTrigger.removeEventListener("click", this._preventNav)
+    }
     document.body.style.position = ''
     document.body.style.top = ''
     document.body.style.left = ''
@@ -355,6 +365,13 @@ const SearchModal = {
     }
     document.addEventListener("keydown", this._globalKeydown)
 
+    // Prevent the search trigger link from navigating when the modal is available
+    this._searchTrigger = document.querySelector('a[aria-label="Search"]')
+    if (this._searchTrigger) {
+      this._preventNav = (e) => e.preventDefault()
+      this._searchTrigger.addEventListener("click", this._preventNav)
+    }
+
     this.el.addEventListener("open-search", () => this.open())
     this.el.addEventListener("close-search", () => this.close())
 
@@ -384,6 +401,9 @@ const SearchModal = {
 
   destroyed() {
     document.removeEventListener("keydown", this._globalKeydown)
+    if (this._searchTrigger && this._preventNav) {
+      this._searchTrigger.removeEventListener("click", this._preventNav)
+    }
   },
 
   updated() {