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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>