fix: icon toggle real-time rendering + hyperscript architecture cleanup

CRITICAL FIX: Icon toggle now works without page refresh
- Changed class name from 'show-logos' to 'show-icons' (CSS mismatch bug)
- Updated localStorage key from 'cv-logos' to 'cv-icons'
- Fixed toggleIcons() function in cv-functions.js

HYPERSCRIPT ARCHITECTURE:
- Moved 6 toggle functions from hyperscript to JavaScript (cv-functions.js)
- Solves hyperscript 0.9.14 parser limitation (max 3 def statements total)
- Upgraded hyperscript from 0.9.12 to 0.9.14
- Fixed operator precedence in keyboard shortcuts
- Cleaned view-controls.html templates (inline → function calls)

NEW FILES:
- static/js/cv-functions.js - Global toggle functions (6 functions)
- HYPERSCRIPT-RULES.md - Permanent architecture documentation
- tests/mjs/0-zoom.test.mjs - Zoom functionality test
- tests/mjs/1-toggles.test.mjs - Comprehensive toggle test with real-time verification
- tests/TEST-SUMMARY.md - Test suite documentation

TESTS:
- Real-time DOM update verification (no refresh required)
- Screenshot capture for visual regression
- localStorage persistence validation
- Toggle synchronization between action bar and menu

BREAKING CHANGE: localStorage key changed from 'cv-logos' to 'cv-icons'
Users may need to re-toggle icons preference on first load after update.

tests/mjs/README.md

@@ -0,0 +1,63 @@
+# CV Project Test Suite
+
+Organized test files for the CV application. All tests use Playwright for browser automation.
+
+## Test Files
+
+### 0-zoom.test.mjs
+**Purpose**: Test zoom control functionality
+- Verifies zoom control elements exist
+- Tests visibility toggle
+- Validates zoom slider interaction
+- Checks real-time zoom updates
+
+**Run**: `bun tests/mjs/0-zoom.test.mjs`
+
+### 1-toggles.test.mjs
+**Purpose**: Comprehensive toggle testing with real-time visual verification
+- Tests all 3 toggles (Length, Icons, Theme)
+- Validates action bar toggles
+- Tests hamburger menu toggles
+- Verifies synchronization between action bar and menu
+- Checks localStorage persistence
+- **Critical**: Validates that toggles update DOM immediately (no refresh needed)
+- Takes screenshots for visual comparison
+
+**Run**: `bun tests/mjs/1-toggles.test.mjs`
+
+## Running All Tests
+
+```bash
+# Run individual tests
+bun tests/mjs/0-zoom.test.mjs
+bun tests/mjs/1-toggles.test.mjs
+
+# Run all tests sequentially
+for test in tests/mjs/*.test.mjs; do
+  echo "Running $test..."
+  bun "$test"
+  echo ""
+done
+```
+
+## Test Requirements
+
+- Server must be running on http://localhost:1999
+- Browser window will stay open after tests for manual verification
+- Press Ctrl+C to exit test
+
+## Test Output
+
+All tests provide:
+- ✅ Clear pass/fail indicators
+- 📊 Summary of results
+- ❌ Detailed error messages
+- 🎉 Success confirmation
+
+## Screenshots
+
+Toggle tests save screenshots to `tests/screenshots/`:
+- `before-icon-toggle.png` - Before clicking icon toggle
+- `after-icon-toggle.png` - After clicking icon toggle
+
+Use these to visually verify rendering changes.