feat: add synchronized hover effect for PDF and print-friendly buttons

- PDF buttons (fixed, action bar, menu) now sync hover states across all instances
- Print-friendly buttons (fixed, action bar, menu) sync green hover states
- White PDF icon with red hover background (#cd6060)
- Green print button hover (#27ae60)
- Implemented using hyperscript with .pdf-hover-sync and .print-hover-sync classes
- Creates cool visual feedback showing all related buttons simultaneously

templates/partials/navigation/action-buttons.html

@@ -2,16 +2,31 @@
 <!-- Right: Action buttons -->
 <div class="action-buttons-right">
     <button
+        id="action-bar-pdf-btn"
         class="action-btn pdf-btn"
         onclick="document.getElementById('pdf-modal').showModal()"
-        aria-label="{{if eq .Lang "es"}}Descargar como PDF{{else}}Download as PDF{{end}}">
-        <iconify-icon icon="mdi:download" width="18" height="18"></iconify-icon>
+        aria-label="{{if eq .Lang "es"}}Descargar como PDF{{else}}Download as PDF{{end}}"
+        _="on mouseenter
+             add .pdf-hover-sync to me
+             add .pdf-hover-sync to #download-button
+           on mouseleave
+             remove .pdf-hover-sync from me
+             remove .pdf-hover-sync from #download-button">
+        <iconify-icon icon="catppuccin:pdf" width="18" height="18"></iconify-icon>
         {{if eq .Lang "es"}}Descargar como PDF{{else}}Download as PDF{{end}}
     </button>
     <button
-        class="action-btn print-btn"
+        class="action-btn print-btn action-bar-print-btn"
         aria-label="{{if eq .Lang "es"}}Imprimir amigable{{else}}Print Friendly{{end}}"
-        _="on click call printFriendly()">
+        _="on click call printFriendly()
+           on mouseenter
+             add .print-hover-sync to me
+             add .print-hover-sync to #print-friendly-button
+             add .print-hover-sync to .menu-print-btn
+           on mouseleave
+             remove .print-hover-sync from me
+             remove .print-hover-sync from #print-friendly-button
+             remove .print-hover-sync from .menu-print-btn">
         <iconify-icon icon="mdi:leaf" width="18" height="18"></iconify-icon>
         {{if eq .Lang "es"}}Imprimir amigable{{else}}Print Friendly{{end}}
     </button>