Complete 3.3.2: Touch Interaction Optimization

- Verified 44px minimum touch targets already in place
- Added swipe gesture support for mobile chat toggling
- Implemented pull-to-refresh functionality for mobile
- Added double-tap gesture for fullscreen toggle on video area
- All touch interactions are mobile-only to avoid desktop conflicts

UI_UPDATE.MD

@@ -346,9 +346,11 @@ Always come back and update UI_UPDATE.MD once complete with task and task item.
 **Notes:** Implemented comprehensive mobile-first responsive design. Updated layout.css to use BEM class names, added vertical stacking layout for mobile (flex-direction: column), chat slides up from bottom as modal overlay on mobile instead of collapsing to the side. Enhanced touch-friendly navigation with 44px minimum touch targets already in place. Updated ui-controls.js to handle mobile chat overlay behavior. Desktop remains side-by-side layout while mobile prioritizes video content with chat on-demand.
 
 #### 3.3.2: Touch Interaction Optimization
-- [ ] Ensure 44px minimum touch targets
-- [ ] Implement swipe gesture support
-- [ ] Add mobile-specific interactive elements
+- [x] Ensure 44px minimum touch targets
+- [x] Implement swipe gesture support
+- [x] Add mobile-specific interactive elements
+
+**Notes:** Implemented comprehensive touch interaction enhancements for mobile devices. The 44px minimum touch targets were already in place using var(--min-tap-target-size, 44px) in components.css. Added swipe gesture support on video area for chat toggling (swipe left to hide, right to show chat on mobile). Implemented pull-to-refresh functionality that triggers refresh when pulling down from top of page on mobile. Added double-tap gesture on video area to toggle fullscreen. All touch interactions are mobile-only to avoid conflicts on desktop.
 
 #### 3.3.3: Mobile Navigation
 - [ ] Create bottom navigation pattern