Say what "open in container" is doing, and land on the pane doing it

Opening a page is a container probe, a browser launch, a page load and
often a viewer start — several seconds during which the only feedback
was the click itself. Worse from a terminal, where the result appears in
a pane the user is not looking at.

So: the backend emits progress on the existing `container-progress`
channel at each step, the Browser tab renders that line whenever it is
set — the progress belongs to the project, not to whoever pressed the
button, which is what lets a terminal-initiated open report anywhere at
all — and the terminal's "In container" now selects the project's
Browser tab before starting, so the line has somewhere to appear.

Selecting a sub-tab from outside needed a route: `ProjectHome` keeps it
in local state, so `openProjectHomeTab` parks a request in the store and
the pane consumes it once. Consumed once, so it cannot fight the user's
own clicking afterwards.

Preview releases now prune themselves to the newest KEEP_PREVIEWS (2),
in a job that runs only if all three platforms published — a
half-finished run must not evict a good older build. The cleanup
workflow's manual sweep stays as the backstop.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

app/src/components/projects/home/BrowserTab.tsx

@@ -377,6 +377,15 @@ export default function BrowserTab({ project, active }: Props) {
           </span>
         )}
         <div className="flex-1" />
+        {progress && (
+          <span
+            className="flex items-center gap-1.5 text-xs text-[var(--text-secondary)] min-w-0"
+            aria-live="polite"
+          >
+            <StatusIndicator tone="busy" label="" />
+            <span className="truncate">{progress}</span>
+          </span>
+        )}
         {live && poppedOut === true && (
           <span className="flex items-center gap-1.5 text-xs text-[var(--text-secondary)]">
             Keep on top

app/src/components/projects/home/ProjectHome.tsx

@@ -43,6 +43,16 @@ export default function ProjectHome({ projectId, active }: Props) {
   const { projects, remove } = useProjects();
   const project = projects.find((p) => p.id === projectId);
   const [tab, setTab] = useState<ProjectHomeTabId>("overview");
+
+  // Somewhere else asked for this project on a particular sub-tab — currently
+  // "I opened a page in the container's browser, show me it". Consumed once, so
+  // it cannot fight the user's own clicking afterwards.
+  const pendingHomeTab = useAppState((s) => s.pendingHomeTab);
+  useEffect(() => {
+    if (pendingHomeTab?.projectId !== projectId) return;
+    setTab(pendingHomeTab.tab as ProjectHomeTabId);
+    useAppState.getState().clearPendingHomeTab();
+  }, [pendingHomeTab, projectId]);
   const [confirmRemove, setConfirmRemove] = useState(false);
   const [confirmReset, setConfirmReset] = useState(false);
   const [showMigration, setShowMigration] = useState(false);