feat: add gallery pagination, dynamic progress colors, and UX fixes

- Replace infinite scroll with page-based navigation in gallery
- Add dynamic progress color (blue→amber→red) in encyclopedia
- Fix timeline not returning to realtime when closing in archive mode
- Simplify image detail modal close button styling
- Add web-design-reviewer skill

src/views/map/MapView.vue

@@ -371,11 +371,14 @@ function handleSliderPointerUp() {
   sliderDragging.value = false
 }
 
-function toggleTimelineControls() {
+async function toggleTimelineControls() {
   timelineControlsOpen.value = !timelineControlsOpen.value
   if (!timelineControlsOpen.value) {
     archivePanelOpen.value = false
     sliderDragging.value = false
+    if (mapMode.value === 'archive') {
+      await returnRealtime()
+    }
   }
 }