Deletes the vanilla shell and mounts App.tsx on #root. main.ts and the
23 views it drove are gone; App.tsx composes the ported components —
sidebar, multi-view, command bar, spawn modal, help and restart
overlays, daemon link, drawer — around the catalog and layout stores.
The pure parts of four deleted modules moved next to the components
that still use them: the spawn-form model and spawnSimilar into
components/spawn, the transcript's markdown/format helpers and the diff
into components/structured, the help overlay's grouping into
components/dialogs. Document-level event names now live in uiEvents.ts.
Deduplicated two pairs the migration left side by side: the sidebar
uses dialogs/KillDialog and common/ContextMenu. It also listens for the
command bar's kill/rename events, which nothing had picked up since
catalog.ts went away.
styles.css stays as the token and base layer, with `#app` renamed to
`#root` and the pane-body rules re-keyed off the classes the React
panes actually carry.
Closes#253
Extends layoutStore with previewSession/commitPreview, mirroring
multiview.ts's preview controller: a throwaway tab for a session no pane
holds, byte-for-byte restore on end, and every real layout-changing action
drops an active preview first. Never schedules a save while a preview is up.
Adds usePreview, wrapping the store actions with previewSchedule.ts's
120ms leading-edge throttle, plus a touch guard and an immediate `end()`
for real changes. MultiView/TabBar render the preview hue on the pane
titlebar, canvas ring/chip, and the throwaway tab (dashed, unclickable).
Closes#249: layoutStore.ts wraps the existing layout.ts tree model
in Zustand, persisting to localStorage on a 400ms debounce and adding
boot reconciliation to prune leaves for sessions no longer live.
MultiView/TabBar/PaneContainer/PaneTitle render tabs, nested splits
with draggable dividers, drag-and-drop tab reordering, and dispatch
each pane to TerminalPane or StructuredPane by session view.
Preview mode (#251) and sidebar drag-to-dock stay out of scope here.
Miguel Palhas