wip(mobile): checkpoint experience round three in progress

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VVYRAqiQj9Y1V9ZfG1RcDH

mobile/main.js

@@ -678,12 +678,21 @@ globeReady
         }
         const subj = s.moment?.subject;
         const c = subj
-          ? { lon: subj.lon, lat: subj.lat - 0.004, height: 4200 }
+          ? { lon: subj.lon, lat: subj.lat, height: 4200 }
           : s.camera || {};
+        const height = Math.max(2500, Math.min(c.height || 3000, 6000));
+        // On a phone the room sheet covers the lower half: lift the place
+        // into the visible top of the map so the hearts rise in view.
+        let lat = c.lat ?? s.lat;
+        if (!isTwoPane()) {
+          const r = stage.getBoundingClientRect();
+          const mPerPx = (height * 0.364) / (Math.min(r.width, r.height) / 2);
+          lat -= (mPerPx * r.height * 0.27) / 111320;
+        }
         g.flyTo({
           lon: c.lon ?? s.lon,
-          lat: c.lat ?? s.lat,
+          lat,
-          height: Math.max(2500, Math.min(c.height || 3000, 6000)),
+          height,
           pitch: -40,
           duration: 1.8,
         });
@@ -1003,7 +1012,22 @@ function buildDirector(g) {
         run: async () => {
           closeAll();
           const m = await hero();
-          const ok = (await callSocial('openRoom', m, { lane: 'live' })).ok;
+          // Show the globe first, then the Live lane over it.
+          const sit =
+            (await getSituations()).find((x) => x.momentId === m.id) || m;
+          if (!isTwoPane()) selectTab('live');
+          await g.flyTo({
+            lon: m.lon,
+            lat: m.lat - 0.004,
+            height: 4200,
+            duration: 1.2,
+          });
+          const ok = (
+            await callSocial('openRoom', sit, {
+              lane: 'live',
+              detent: 'medium',
+            })
+          ).ok;
           if (!ok) await openRoom(m, { lane: 'live' });
           for (let i = 0; i < 6; i += 1)
             setTimeout(

mobile/styles/layout.css

@@ -170,7 +170,7 @@
   }
 
   .mp-pops {
-    width: 230px;
+    width: min(230px, calc(46% - 14px));
   }
 
   .app.is-moment .gc-attr {
@@ -178,7 +178,7 @@
   }
 
   .mp-legend {
-    width: 250px;
+    width: min(250px, calc(50% - 14px));
   }
 
   .mp-title {

mobile/ui/moment.js

@@ -85,6 +85,14 @@ export function normMoment(m) {
       media: c.media || c.kind || 'photo',
       live: c.live || c.kind === 'live',
       distanceM: c.distanceM ?? c.rangeM ?? Math.round(dist(c)),
+      headingDeg: Number.isFinite(c.headingDeg)
+        ? c.headingDeg
+        : (Math.atan2(
+            (subject.lon - c.lon) * Math.cos((c.lat * Math.PI) / 180),
+            subject.lat - c.lat,
+          ) *
+            180) /
+          Math.PI,
     })),
     chat: (m.chat || []).map((c) => ({ ...c, handle: at(c.handle) })),
     posts: (m.posts || []).map((p) => ({
@@ -556,7 +564,21 @@ export function createMomentPlayer({
     if (!m) return;
     cancelAnimationFrame(raf);
     raf = 0;
-    globe.exitMoment();
+    // Stop the clock and let a frame render before the engine tears the
+    // Moment's primitives down (exiting mid-frame can stop Cesium's render).
+    globe.playback.stop();
+    const leaving = m;
+    requestAnimationFrame(() =>
+      requestAnimationFrame(() => {
+        if (m === null || m === leaving) globe.exitMoment();
+      }),
+    );
+    try {
+      ext?.destroy?.();
+    } catch {
+      /* ignore */
+    }
+    ext = null;
     offOwn?.();
     offOwn = null;
     const was = m;

mobile/ui/timeRibbon.js

@@ -552,6 +552,7 @@ export function createTimeRibbon(
   function goLive() {
     haptic('tick');
     stopPlay();
+    if (clipMode) setClipMode(false);
     if (custom) {
       animateTo(custom.start, () => emit(true));
       return;