feat(panels): build the rail panels on one UiPanel

The Data, Authoring, Weather, Recent Imagery, Context, CCTV, Street Level
and Radio panels each wrote the same frame by hand. They are now one kit
component, UiPanel, with a title, badge/actions/default slots and
v-model:collapsed, drawing Core's panel markup and classes beside the kit's;
props cover the differences (sideways, glow, scroll, railScroller, tag,
toggleWords). RailPanel binds it to the panel chrome store: v-panel-state
writes its state classes at once, and its button's clicks reach PanelChrome.
UiPanelToggle is the collapse button UiPanel and PanelCollapseButton share.

UiPanel's collapsed drives the button and ui-panel--collapsed
only; the owner hides the body by writing the root's collapsed class, since
the rails measure a panel in the task that opens it. PanelCollapseButton
takes startCollapsed instead of initial and initialTitle, so a button shows
its state's glyph and words before startup presents the panel. Titles render
through t() instead of data-i18n, and the unused "Expand panel" string is
pruned. v-panel-state redraws the presented state after a re-render, in
case a root's class binding ever changes.

src/ui/views/panels/RadioPanel.vue

@@ -2,8 +2,7 @@
 import { storeToRefs } from 'pinia';
 import { computed } from 'vue';
 import { t } from '../../../i18n/index.js';
-import { vPanelState } from '../../rail/panelState.js';
-import PanelCollapseButton from '../../rail/PanelCollapseButton.vue';
+import RailPanel from '../../rail/RailPanel.vue';
 import { vClassToggle } from '../../rail/classToggle.js';
 import { vFieldValue } from '../../rail/fieldValue.js';
 import { vRangeValue } from '../../rail/rangeValue.js';
@@ -21,7 +20,6 @@ const { view: radio, sdr } = storeToRefs(useRadioStore());
 const sdrConnected = computed(() => sdr.value?.connectionActive ?? null);
 // The collapse button keeps Radio's own wording, not "Expand RADIO".
 const radioWords = {
-  initialLabel: t('Expand Radio section'),
   expandLabel: t('Expand Radio section'),
   collapseLabel: t('Collapse Radio section'),
   expandTitle: t('Expand Radio'),
@@ -30,14 +28,8 @@ const radioWords = {
 </script>
 
 <template>
-<section id="radio-panel" v-panel-state="'radio-panel'" class="panel-collapsible collapsed" v-class-toggle="{ ...(radio && { 'radio-enabled': radio.enabled, 'lifecycle-uncertain': radio.uncertain }), ...(sdrConnected !== null && { 'sdr-connected': sdrConnected }) }" data-panel-id="radio-panel" aria-label="Internet radio and local SDR" data-i18n-aria-label>
-  <div class="radio-panel-inner ui-scroll">
-    <div class="panel-header">
-      <span class="panel-title" data-i18n>RADIO</span>
-      <span id="radio-layer-state" class="radio-layer-state" :class="{ active: radio?.layerState.active }">{{ radio ? radio.layerState.text : t('OFF') }}</span>
-      <span class="panel-divider"></span>
-      <PanelCollapseButton target="radio-panel" initial="+" :initial-title="t('Expand Radio')" :words="radioWords" />
-    </div>
+<RailPanel id="radio-panel" tag="section" start-collapsed v-class-toggle="{ ...(radio && { 'radio-enabled': radio.enabled, 'lifecycle-uncertain': radio.uncertain }), ...(sdrConnected !== null && { 'sdr-connected': sdrConnected }) }" aria-label="Internet radio and local SDR" data-i18n-aria-label :title="t('RADIO')" :toggle-words="radioWords" :glow="false" scroll>
+  <template #badge><span id="radio-layer-state" class="radio-layer-state" :class="{ active: radio?.layerState.active }">{{ radio ? radio.layerState.text : t('OFF') }}</span></template>
     <div class="radio-directory-row">
       <button id="radio-enable-btn" class="panel-layer-toggle" :class="{ active: radio?.enable.active }" type="button" :aria-pressed="String(radio?.enable.active ?? false)" :aria-label="radio?.enable.label" :aria-disabled="radio ? String(radio.enable.busy) : undefined" :aria-busy="radio ? String(radio.enable.busy) : undefined">{{ radio ? radio.enable.text : t('ENABLE') }}</button>
       <label class="radio-filter-label" for="radio-filter" data-i18n>STATION TAG</label>
@@ -69,6 +61,5 @@ const radioWords = {
     </div>
     <p class="radio-privacy" data-i18n>Audio connects directly to the broadcaster after you press play. Your IP is visible to that broadcaster.</p>
     <SdrCard />
-  </div>
-</section>
+</RailPanel>
 </template>