A minor release: idle message delivery for spt-hosted endpoints now runs through an adapter translation binary, `spt rc` gains real paste, key, and mouse support on Windows and stays attached under heavy output, session resume actually resumes a prior session, and the daemon no longer flashes a console window.

### Added

- **Idle message delivery for spt-hosted endpoints now uses a translation binary.** An adapter can declare a `[message-idle-translation-binary]`; spt-core brings it up alongside the endpoint, where it polls the relay for incoming messages and optionally emits keypresses, delays, and text injection that spt-core applies to the endpoint's terminal. Idle delivery now flows through the relay poll for every endpoint, instead of spt-hosted endpoints falling back to direct PTY injection.
- **Windows paste in `spt rc`.** Ctrl+V and right-click now paste the local clipboard into the attached agent as a single bracketed paste.
- **Windows special keys in `spt rc`.** Arrow keys, Home/End, Delete, function keys and other special keys are translated to terminal sequences and reach the agent — previously only plain characters got through.
- **`spt rc` forwards mouse scroll** to the agent's terminal.

### Fixed

- **Pasting or typing into an spt-hosted endpoint no longer freezes the daemon.** A large paste or input burst could wedge the daemon's input path so every new attach died; input now runs on a dedicated per-session writer and never blocks the daemon (this also covers the effect-journal stall on interactive input).
- **Session resume actually resumes now.** Agent endpoints track session history and offer explicit session resume via `spt endpoint run` (`--resume <session>` or *Resume from history*); the adapter manifest can now declare a `[session.resume]` command so the relaunch reattaches the prior session instead of always starting a new one. The run picker now shows each row's working directory and local time.
- **`spt rc --view` viewers survive a high-output terminal.** A viewer no longer dies when the output backlog rolls over or it is briefly evicted — it snaps forward or skips to live instead of failing — and a slow controller can no longer starve a concurrent viewer.
- **`spt rc` no longer races a just-started agent.** Attach now waits for the endpoint to come online, instead of failing when you attach immediately after `spt endpoint run`.
- **The daemon no longer flashes or respawns a console window on Windows.**
- **Windows Backspace and Ctrl+Backspace now do the right thing in `spt rc`.** Backspace deletes a character and Ctrl+Backspace deletes the previous word (Windows-native), instead of both deleting only a character.

### Changed

- **The `spt endpoint run` picker is clearer.** It opens directly on an existing pick, auto-attaches, shows the controlling node name, and produces clean bring-up output.
- **Human-prose command output renders Markdown.** Prose output (how-to topics and similar) now shows styled headers and emphasis in a terminal and clean plain text when piped — matching the v0.12.1 `--help` fix.