fix(mobile-menu): move state to root component and refine event isolation

partials/mobile-menu.hbs

@@ -1,5 +1,5 @@
 <div id="mobile-menu" 
-    x-show="$store.mobileMenu.open"
+    x-show="mobileMenuOpen"
     x-transition:enter="transition ease-out duration-300"
     x-transition:enter-start="-translate-x-full"
     x-transition:enter-end="translate-x-0"
@@ -7,13 +7,13 @@
     x-transition:leave-start="translate-x-0"
     x-transition:leave-end="-translate-x-full"
     class="fixed inset-0 z-50 bg-[var(--bg-primary)] flex flex-col md:hidden"
-    @click.away="$store.mobileMenu.close()"
+    @click.away="mobileMenuOpen = false"
     hx-boost="false"
     x-cloak>
     
     <!-- Mobile Menu Header -->
     <div class="flex justify-between items-center p-5 flex-none">
-        <a href="{{@site.url}}" class="flex items-center text-[var(--text-primary)]" @click.stop="$store.mobileMenu.close()">
+        <a href="{{@site.url}}" class="flex items-center text-[var(--text-primary)]" @click.stop="mobileMenuOpen = false">
             {{#if @site.logo}}
                 <img src="{{@site.logo}}" alt="{{@site.title}}" class="h-10 w-auto site-logo">
             {{else}}
@@ -21,7 +21,7 @@
             {{/if}}
             <span class="ml-3 text-xl font-bold">{{@site.title}}</span>
         </a>
-        <button @click.stop="$store.mobileMenu.close()" class="p-2 rounded-full bg-[var(--bg-secondary)] text-[var(--text-primary)] hover:bg-[var(--bg-tertiary)] transition-colors duration-200">
+        <button @click.stop="mobileMenuOpen = false" class="p-2 rounded-full bg-[var(--bg-secondary)] text-[var(--text-primary)] hover:bg-[var(--bg-tertiary)] transition-colors duration-200">
             <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-6 h-6">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M6 18L18 6M6 6l12 12" />
             </svg>
@@ -29,7 +29,7 @@
     </div>
 
     <!-- Mobile Menu Navigation -->
-    <nav class="flex-grow flex flex-col items-center justify-center p-10 overflow-y-auto" @click="$store.mobileMenu.close()">
+    <nav class="flex-grow flex flex-col items-center justify-center p-10 overflow-y-auto" @click="mobileMenuOpen = false">
         <div class="w-full text-center">
             {{navigation type="primary"}}
         </div>