refactor: Migrate zoom control and expand/collapse to hyperscript

- Move initZoomControlButtons() from main.js to hyperscript handlers
  - zoom-toggle-button: on click call toggleZoomControl()
  - zoom-close: on click call hideZoomControl()
  - show-zoom-menu-btn: on click call showZoomControl()
- Move expandAllSections/collapseAllSections from JS to utils._hs
- Add zoom visibility functions to zoom._hs:
  - showZoomControl(), hideZoomControl(), toggleZoomControl()
- Update hamburger menu links to use hyperscript calls

Eliminates ~75 more lines of JavaScript in favor of declarative
hyperscript, continuing the pattern of moving behavior to ._hs files.

templates/partials/navigation/hamburger-menu.html

@@ -65,15 +65,16 @@
                 <span>{{if eq .Lang "es"}}Acciones Rápidas{{else}}Quick Actions{{end}}</span>
             </div>
 
-            <a href="#" class="menu-item menu-item-action" onclick="collapseAllSections(event)">
+            <a href="#" class="menu-item menu-item-action" _="on click call collapseAllSections(event)">
                 <iconify-icon icon="mdi:arrow-collapse-all" width="20" height="20"></iconify-icon>
                 <span>{{if eq .Lang "es"}}Colapsar Todo{{else}}Collapse All{{end}}</span>
             </a>
-            <a href="#" class="menu-item menu-item-action" onclick="expandAllSections(event)">
+            <a href="#" class="menu-item menu-item-action" _="on click call expandAllSections(event)">
                 <iconify-icon icon="mdi:arrow-expand-all" width="20" height="20"></iconify-icon>
                 <span>{{if eq .Lang "es"}}Expandir Todo{{else}}Expand All{{end}}</span>
             </a>
-            <a href="#" id="show-zoom-menu-btn" class="menu-item menu-item-action zoom-hidden">
+            <a href="#" id="show-zoom-menu-btn" class="menu-item menu-item-action zoom-hidden"
+               _="on click call showZoomControl()">
                 <iconify-icon icon="mdi:magnify" width="20" height="20"></iconify-icon>
                 <span>{{if eq .Lang "es"}}Zoom{{else}}Zoom{{end}}</span>
             </a>

templates/partials/widgets/zoom-control.html

@@ -40,7 +40,8 @@
         id="zoom-close"
         class="zoom-close-btn"
         aria-label="{{if eq .Lang "es"}}Cerrar control de zoom{{else}}Close zoom control{{end}}"
-        title="{{if eq .Lang "es"}}Cerrar{{else}}Close{{end}}">
+        title="{{if eq .Lang "es"}}Cerrar{{else}}Close{{end}}"
+        _="on click call hideZoomControl()">
         <iconify-icon icon="mdi:close" width="16" height="16" style="pointer-events: none;"></iconify-icon>
     </button>
 

templates/partials/widgets/zoom-toggle-button.html

@@ -5,7 +5,8 @@
     class="fixed-btn zoom-toggle-btn no-print has-tooltip"
     aria-label="{{if eq .Lang "es"}}Alternar control de zoom{{else}}Toggle zoom control{{end}}"
     data-tooltip="{{if eq .Lang "es"}}Control de zoom{{else}}Zoom control{{end}}"
-    _="on mouseenter call highlightZoomControl(true)
+    _="on click call toggleZoomControl()
+       on mouseenter call highlightZoomControl(true)
        on mouseleave call highlightZoomControl(false)">
     <iconify-icon icon="mdi:magnify" width="28" height="28"></iconify-icon>
 </button>