Add engines from the command line through the Typing menu's path

omarchy setup input <engine> had its own restart, append, select and
live-rollback code in configure.py, parallel to the menu's. It now
installs the packages and appends through typing_setup, leaving
configure.py with install-time seeding and update defaults.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/input-methods.md

@@ -8,7 +8,7 @@ The ISO carries the extra fields in `omarchy_install.input_method` and `omarchy_
 
 `default/input-methods/configure.py` owns the shared configuration behavior. Offline seeding replaces only a missing profile or Fcitx's untouched single `keyboard-us` guess. The group layout matches Hyprland's effective leading layout and variant; non-Latin layouts retain the US-leading behavior used for desktop bindings. The selected composition engine is the group's `DefaultIM`, with `ActiveByDefault=False` so initial typing remains Latin. Existing multilingual profiles and explicitly chosen keyboard layouts are preserved.
 
-`omarchy setup input <engine>` installs the selected engine, restarts the supervised Fcitx unit so it discovers new addons, and appends the engine through `InputMethodGroupInfo`, `SetInputMethodGroupInfo`, and `Save`. It keeps the group name, layout, existing methods, and their layout overrides. There is no parallel unsupervised daemon. A per-user D-Bus activation file delegates `org.fcitx.Fcitx5` to `omarchy-fcitx5.service`; it is loaded before live restart.
+`omarchy setup input <engine>` installs the selected engine's packages, then appends it through the same path as the Input Methods picker. Selecting an engine whose package is installed but which the running Fcitx has not discovered (one an update installed, say) restarts the supervised Fcitx unit once and waits for it; an engine whose package is missing is refused with the package name. Changes go through `InputMethodGroupInfo`, `SetInputMethodGroupInfo`, and `Save`, keeping the group name, layout, existing methods in their switching order, and their layout overrides. There is no parallel unsupervised daemon. A per-user D-Bus activation file delegates `org.fcitx.Fcitx5` to `omarchy-fcitx5.service`.
 
 `Setup > Typing > Keyboard Layouts` and `Input Methods` use the native menu's multi-select mode, with current entries checked and changes applied immediately. `default/input-methods/typing_setup.py` uses the installer’s keyboard choices, converted to desktop layouts through systemd’s keymap table, and reads the current input group. Input selection replaces only the non-keyboard group items and retains selected engines' layout overrides; deselection does not uninstall packages. The standard composition engines are already shipped in the base package set. Closing a picker keeps changes already applied. Failed updates leave its checked state unchanged.
 
@@ -16,7 +16,7 @@ Keyboard selections are persisted as data in `~/.config/omarchy/keyboard-layouts
 
 Shortcut defaults reserve Ctrl+Space for Tmux/Herdr, Super+Space for the menu, Super+Shift+Space for the bar, and Super+grave for the console. Hyprland owns Super+I to cycle all selected compositor layouts followed by the configured Fcitx input methods, independently of Fcitx switching keys. With keyboard layouts alone, the same shortcut cycles the compositor layouts, keeping matching devices in sync even without the bar widget. The widget is enabled in the default right-hand bar layout and appears only when more than one input method or keyboard layout is configured. Fcitx handles Zenkaku/Hankaku and Hangul; Henkan activates and Muhenkan deactivates. An existing configured list, including an empty list, is preserved. Stock generated lists are repaired only while the user still has the single-keyboard default profile. A terminal Ctrl+Space returns to direct input before the following key, with a 300 ms timeout and no D-Bus activation; a keyboard-only profile skips this step. Wayland and XCB addons do not override the compositor's XKB settings.
 
-The migration installs the standard engines and applies conservative defaults. It aligns an untouched Fcitx keyboard profile with the install layout, using the live controller when Fcitx is running. It leaves existing multilingual profiles and working trigger keys alone. Atomic file writes follow configuration symlinks, preserve file modes, and roll back on a failed seed or live setup so a retry can complete. Live rollback stops Fcitx before restoring disk, then reloads activation and restarts the unit. Migration bus errors defer profile alignment to the next login and do not restart input. If a pre-update daemon has not discovered a new engine, the migration aligns only its keyboard and prints the setup command.
+The migration installs the standard engines and applies conservative defaults. It aligns an untouched Fcitx keyboard profile with the install layout, using the live controller when Fcitx is running. It leaves existing multilingual profiles and working trigger keys alone. Atomic file writes follow configuration symlinks, preserve file modes, and roll back on a failed seed or migration so a retry can complete. Migration bus errors defer profile alignment to the next login and do not restart input. If a pre-update daemon has not discovered a new engine, the migration aligns only its keyboard and prints the setup command.
 
 Input selection does not change the system locale, repository region, desktop language, or Latin interface font. A new language setup seeds a CJK fallback preference once; additional languages do not overwrite it.