feat(trip): pill radius on panel toggles, slide animation, mobile close button

- Radius: trip-panel-toggle now uses --radius-full, consistent with filter pills
- Animation: stats/cycling blocks use CSS grid-template-rows 0fr→1fr transition
  (inner trip-panel-inner div carries decoration so border/padding don't peek
  out when collapsed; display:none removed)
- Close button: ↑ Close stats / ↑ Close cycling at bottom of each panel,
  hidden ≥769px, triggers the header toggle via data-toggle attribute

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

themes/intotheeast/css/style.css

@@ -968,7 +968,7 @@ body::after {
 .trip-panel-toggle {
     background: transparent;
     border: 1px solid var(--color-border);
-    border-radius: var(--radius-sm);
+    border-radius: var(--radius-full);
     padding: var(--space-1) var(--space-3);
     font-family: var(--font-ui);
     font-size: var(--text-sm);
@@ -1149,12 +1149,54 @@ body::after {
 
 /* ── Trip page inline stats block ───────────────────────────────────────────── */
 
-.trip-stats-block {
+.trip-stats-block,
+.trip-cycling-block {
+    display: grid;
+    grid-template-rows: 0fr;
+    overflow: hidden;
+    margin-bottom: 0;
+    transition: grid-template-rows 0.35s ease, margin-bottom 0.35s ease;
+}
+
+.trip-stats-block.is-open,
+.trip-cycling-block.is-open {
+    grid-template-rows: 1fr;
+    margin-bottom: var(--space-6);
+}
+
+.trip-panel-inner {
+    min-height: 0;
+    overflow: hidden;
     background: var(--color-canvas);
     border: 1px solid var(--color-border);
     border-radius: var(--radius-md);
     padding: var(--space-6);
-    margin-bottom: var(--space-6);
+}
+
+.trip-panel-close {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 100%;
+    margin-top: var(--space-6);
+    padding: var(--space-2) var(--space-4);
+    background: transparent;
+    border: 1px solid var(--color-border);
+    border-radius: var(--radius-full);
+    font-family: var(--font-ui);
+    font-size: var(--text-sm);
+    color: var(--color-ink-muted);
+    cursor: pointer;
+    transition: color 0.15s, border-color 0.15s;
+}
+
+.trip-panel-close:hover {
+    color: var(--color-ink);
+    border-color: var(--color-ink-muted);
+}
+
+@media (min-width: 769px) {
+    .trip-panel-close { display: none; }
 }
 
 .trip-stats-grid {
@@ -1181,13 +1223,6 @@ body::after {
 
 /* ── Trip page cycling panel ─────────────────────────────────────────────────── */
 
-.trip-cycling-block {
-    background: var(--color-canvas);
-    border: 1px solid var(--color-border);
-    border-radius: var(--radius-md);
-    padding: var(--space-6);
-    margin-bottom: var(--space-6);
-}
 
 .trip-cycling-header {
     display: flex;