v0.11.0

Minor Changes

• 2bc9db6: Return per-surface ids, kinds, and indexes in write responses without echoing surface payload bodies, and remove the redundant top-level kinds array. Read kinds from surfaces.map((surface) => surface.kind) instead.
• 28a3a6d: Add a host-overridable ss:aside-head slot at the top of the sidebar, above the session list (mirrors ss:aside-foot). Self-hosted rendering is unchanged; an embedder can project a sidebar header — e.g. a workspace picker and a pinned Home link — above the session list.
• 71bf606: Add a hideBrand flag to the embed host contract. When set, the engine omits its own "sideshow" wordmark (the sidebar/header home-link brand) so a host that supplies its own branding — e.g. a workspace picker atop the sidebar and a wordmark in the footer — isn't doubled up. Self-hosted leaves it unset and shows the wordmark as before.
• 1b7a28c: Add a homeView flag to the embed host contract. When a host owns its own session-less landing (e.g. a "home" feed), the engine no longer auto-selects a session on boot — it honors a deep-linked route session but otherwise stays session-less so nothing is highlighted behind the host's landing, and it clears the selection when the route later becomes session-less. Self-hosted leaves the flag unset and is unchanged (auto-selects the latest session on boot).
• 5eba65a: Add a server onEvent feed tap for hosts and a liveTransport: "ws" viewer-embed option so hosted wrappers can provide hibernation-friendly WebSocket live updates while self-hosted sideshow keeps using SSE by default.
• ffe7099: Embed host contract: onThemeChange now receives a second meta argument —
  { theme, mode } — naming the resolved theme id and light/dark scheme behind the
  tokens it already reports. Hosts that re-render surfaces out-of-band (e.g.
  server-side preview frames they can't theme from the token values alone) can pass
  those identifiers to /s/:id?theme=&mode= to reproduce the exact look; hosts that
  only paint from the token values ignore it. Additive — the tokens argument is
  unchanged and the default self-hosted host is unaffected.

Patch Changes

• ed8b987: Validate sideshow surface add has at least one surface flag before resolving or creating a session, and resolve long-poll waits promptly when clients disconnect.
• 7698b1f: Hydrate session post streams from the session list endpoint to avoid N+1 post detail requests on open.
• 23dad90: Lazy-load sandboxed surface iframes to reduce initial viewer work on long sessions.
• 46cf918: Fix markdown/code/diff/mermaid surfaces rendering on a white canvas (washed-out
  text) on a dark board. These rich-part frames are sandboxed opaque-origin
  iframes, which default to color-scheme: normal (light), so in dark mode the UA
  painted a white backdrop behind the transparent body. They now pin color-scheme
  to the resolved scheme — like html surfaces already do — so the frame's canvas
  tracks the card in both light and dark.
• 2bc9db6: List session posts with canonical surfaces entries that include surface ids and omit elided html bodies.
• cc6504c: Slides kit now grid-stacks its deck so it cross-fades in normal flow. Previously
  it swapped slides with display:none, which can't fade — so decks were hand-rolled
  with position:absolute slides over a min-height stage, an out-of-flow layout the
  surface-page height bridge can't measure (the overlay grows scrollHeight but not
  the box its ResizeObserver watches), leaving the frame clipped/frozen. The kit now
  stacks slides in one grid cell (in flow, sized to the tallest slide) and fades with
  opacity/visibility, so the frame follows it. DESIGN_GUIDE documents the out-of-flow
  trap and the grid-stack recipe alongside the existing position: fixed ban.
• 2bc9db6: Expose derived 0-based surface indexes on post detail, session post list, and post history read responses.
• 0a094ac: Let direct rich-surface renders without an explicit mode follow the browser's system color scheme.
• 565c85f: Fix intermittent clipping in surface iframes when async content settles after the initial resize pass.