feat(layout): input-bar + chat/clergy resize, masked sudo-for-docker, edit-mode unlock

Make the message-input bar part of the F5 resize cycle so its height is
adjustable without a sandbox (multi-line/wrapped inputs are now readable),
and let chat/clergy borrow height from the compose box when no terminal is
present. Add Option C masked sudo prompt that feeds `sudo -S` over stdin to
install/start Docker — the password never reaches chat, the PTY, or outbound
frames, and Docker Desktop on Linux is detected so no sudo is requested.

Fix a freeze where clicking the compose box entered layout-edit mode and
silently swallowed every keystroke: clicking the input bar no longer enters
edit mode, and typing any printable char now drops out of edit mode and types.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -21,6 +21,9 @@ secured_console_chat.egg-info/
 *.log
 err.log
 
+# Sandbox save/load snapshots (large runtime tarballs, not source)
+/hh/hh-snapshots/
+
 # Out-of-tree experiments (not part of hack-house)
 /experiments/
 /headroom/