Load engines installed after Fcitx started when they are selected

The Typing menu refused an engine whose package an update had installed,
since Fcitx discovers engines only at startup. Restart input once and wait
for the engine; name the package when it really is not installed.

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

default/input-methods/typing_setup.py

@@ -106,12 +106,27 @@ def configure_inputs():
   choose("Input Methods", catalog, current, "input", dict(items))
 
 
+def load_engines(names, catalog):
+  packages = sorted({package for name in names for package in setup.PRESETS.get(name, {}).get("packages", [])})
+  absent = [package for package in packages
+            if subprocess.run(["omarchy-pkg-present", package], capture_output=True).returncode]
+  if absent or any(name not in setup.PRESETS for name in names):
+    labels = ", ".join(catalog.get(name, name) for name in names)
+    raise RuntimeError(f"Install {' '.join(absent) or 'its engine'} to use {labels}")
+  # Fcitx discovers engines only at startup, so one installed while it was
+  # running (by an update, say) needs a restart before it can be selected.
+  setup.run(["omarchy-restart-xcompose"])
+  for name in names:
+    setup.wait_ready(name)
+
+
 def save_inputs(selected, overrides=None):
   group, layout, items = setup.live_group()
   catalog, available = input_catalog(items)
-  missing = [catalog.get(name, name) for name in selected if name not in available]
+  missing = [name for name in selected if name not in available]
   if missing:
-    raise RuntimeError("Restart input after updating Omarchy to use: " + ", ".join(missing))
+    load_engines(missing, catalog)
+    group, layout, items = setup.live_group()
   set_inputs(group, layout, items, input_items(items, selected, overrides))
   # Only a saved engine claims the CJK font fallback, and a failed font write
   # returns the group so the menu's restored checks stay true.