Module install 

BC.4: the crate-owned install(boot) entry point.

Terminal’s only host-side boot wiring was its mode registration; this moves it into one Phase-B line (lattice_terminal::install(&mut boot)) against the generic [SubsystemBoot] surface, matching the claude-code shape (BC.3b).

Two terminal touch-points intentionally stay host-side, and are not mode-ownership violations:

• The TerminalStoreHandle service is a host-published primitive — the host’s BufferRegistry exposed under dyn TerminalStore (the impl TerminalStore for BufferRegistry lives in lattice-host). It’s the same category as buffer_store / diagnostics: the host owns the data, the terminal mode consumes it via services.get. The SubsystemBoot surface can’t carry a terminal-specific type, so it stays host-registered until/unless terminal impls TerminalStore over BufferStoreHandle.
• The Editor-coupled invocation runner (Editor::run_terminal_invocation) is the shared invocation-runner mechanism (Help / Oil / FileTree / Terminal all bind Editor::run_*_invocation); migrating it is a cross-cutting cleanup, not a terminal slice.

Functions

install

Wire the terminal subsystem into the editor at boot.