feat(ui): render the Street Level panel from a store

The panel's markup moves, verbatim, into StreetLevelPanel, which renders
the presentation StreetLevelControls publishes to the gev-street-level
store, with the EXPAND state. The controls keep their listeners, full
screen and popover handling, focus moves, resizing and transitions. The
SINCE readout follows the thumb while dragging and shows the recorded
window once the thumb is there; the thumb never moves under the user's
hand. Text the panel now renders itself drops its data-i18n markers.
Panels lifted out of a view live in src/ui/views/panels/, kept out of
Prettier like the views.

scripts/package-boundaries.json

@@ -44,7 +44,10 @@
       "src/i18n/locales/ru.json",
       "src/i18n/locales/uk.json",
       "src/i18n/locales/zh-CN.json",
-      "src/i18n/locales/zh-Hant.json"
+      "src/i18n/locales/zh-Hant.json",
+      "src/ui/views/panels/StreetLevelPanel.vue",
+      "src/ui/stores/streetLevel.js",
+      "src/ui/rail/RailChips.vue"
     ],
     "external": ["vue", "pinia"]
   },
@@ -944,7 +947,8 @@
       "src/ui/rail/utcClock.js",
       "src/ui/rail/RailTimeline.vue",
       "src/ui/rail/rangeValue.js",
-      "src/ui/weather/WeatherReadout.vue"
+      "src/ui/weather/WeatherReadout.vue",
+      "src/ui/stores/streetLevel.js"
     ],
     "external": ["cesium", "vue", "pinia"]
   },
@@ -2909,7 +2913,8 @@
       "src/ui/rail/rangeValue.js",
       "src/ui/weather/WeatherReadout.vue",
       "src/ui/recentImagery/RecentImageryCard.vue",
-      "src/ui/recentImagery/RecentImageryReadout.vue"
+      "src/ui/recentImagery/RecentImageryReadout.vue",
+      "src/ui/stores/streetLevel.js"
     ],
     "external": [
       "hls.js",