refactor: migrate toggle and hover sync functions from JavaScript to Hyperscript

BREAKING: Removed JavaScript toggle functions in favor of organized Hyperscript architecture

Changes:
- Created organized Hyperscript file structure (no def limit with latest version):
  • static/hyperscript/utils._hs (utility functions)
  • static/hyperscript/toggles._hs (CV length, icons, theme toggles)
  • static/hyperscript/hover-sync._hs (PDF/Print hover sync + zoom highlight)

- Removed functions._hs (renamed to utils._hs for better organization)

- Emptied static/js/cv-functions.js (kept file with migration notice)
  • toggleCVLength, toggleIcons, toggleTheme → toggles._hs
  • syncPdfHover, syncPrintHover, highlightZoomControl → hover-sync._hs

- Updated templates/index.html to load all 3 new hyperscript files

- Updated tests/mjs/1-toggles.test.mjs for responsive design
  • Added viewport detection for desktop vs mobile toggles
  • Tests now adapt to screen size

Rationale:
- Test 9 confirmed NO def limit with latest hyperscript (tested up to 5 defs)
- Better separation of concerns with category-based file organization
- Aligns with server-side hypermedia pattern (HTMX + Hyperscript)
- Eliminates workaround JavaScript duplication
- 9 total def statements across 3 files (proving no limit)

Verified:
✅ All hyperscript files load successfully (HTTP 200)
✅ Hyperscript library loads without errors
✅ Functions work correctly in browser
✅ No console errors
✅ Test 9 (def limit) passes with 5 def statements

Related: Test 9 verification (tests/mjs/9-hyperscript-def-limit.test.mjs)

static/hyperscript/hover-sync._hs

@@ -0,0 +1,57 @@
+-- ==============================================================================
+-- CV Site - Hover Synchronization Functions
+-- ==============================================================================
+-- Synchronize hover states between action bar and hamburger menu buttons
+-- Migrated from JavaScript (cv-functions.js) after confirming no def limit
+
+-- ==============================================================================
+-- PDF BUTTON HOVER SYNC
+-- ==============================================================================
+
+def syncPdfHover(show)
+  -- Select all PDF buttons (action bar + menu)
+  set pdfButtons to <.pdf-btn, .menu-pdf-btn/>
+
+  if show is true
+    for btn in pdfButtons
+      add .pdf-hover-sync to btn
+    end
+  else
+    for btn in pdfButtons
+      remove .pdf-hover-sync from btn
+    end
+  end
+end
+
+-- ==============================================================================
+-- PRINT BUTTON HOVER SYNC
+-- ==============================================================================
+
+def syncPrintHover(show)
+  -- Select all Print buttons (action bar + menu)
+  set printButtons to <.print-btn, .menu-print-btn/>
+
+  if show is true
+    for btn in printButtons
+      add .print-hover-sync to btn
+    end
+  else
+    for btn in printButtons
+      remove .print-hover-sync from btn
+    end
+  end
+end
+
+-- ==============================================================================
+-- ZOOM CONTROL HIGHLIGHT
+-- ==============================================================================
+
+def highlightZoomControl(show)
+  set zoomWrapper to #zoom-wrapper
+
+  if show is true
+    add .highlight to zoomWrapper
+  else
+    remove .highlight from zoomWrapper
+  end
+end