refactor(input): own gameplay action routing

Move the sole semantic action-priority graph, combat and diagnostic commands, and retained-root item-drop lifetime behind focused typed owners. Preserve retail toggle behavior, explicit auto-wield cancellation, shutdown quiescence, and symmetric callback cleanup.

Co-authored-by: Codex <codex@openai.com>

docs/plans/2026-07-22-gamewindow-slice-8-composition-lifecycle.md

@@ -23,7 +23,7 @@ audit.
 - [x] D — extract retail world-environment/day/weather behavior.
 - [x] E — extract two-phase raw pointer/camera input, focus, and framebuffer
   resize behind symmetric named subscriptions.
-- [ ] F — extract the sole gameplay input-action router plus focused combat and
+- [x] F — extract the sole gameplay input-action router plus focused combat and
   diagnostic command owners.
 - [ ] G — extract two-phase persisted settings/display/quality ownership.
 - [ ] H — give terrain atlas, sky shader, retained `UiHost`, and both frame roots
@@ -527,6 +527,23 @@ connected lifecycle and visual gates.
 - Make Combat, Camera, dispatcher, and retained-root subscriptions named,
   transactional, and symmetrically detached.
 
+Result: `GameplayInputActionRouter` is the sole gameplay subscriber to
+`InputDispatcher.Fired` and preserves the frozen pointer → scroll → combat →
+Press/DoubleClick gate → retained UI → selection → movement → command
+priority. Focused command owners now route combat, diagnostics, window/player
+mode, item-target mode, and Escape without calling feature bodies on
+`GameWindow`. `RetainedUiGameplayBinding` owns the outside-UI item-drop edge;
+the combat/diagnostic deferred slots release their targets before session
+retirement, and the retained binding detaches transactionally afterward.
+Named-retail review
+also corrected `ToggleCombatMode @ 0x0056C8C0`: active combat short-circuits to
+peace without an equipment lookup, while an incompatible Held object prints
+the exact retail notice and sends no mode request. Three corrected-diff review
+loops are clean; 54 focused App tests, 20 Core combat tests, the App suite
+(3,155 pass / 3 intentional skips), the Release build, and the complete suite
+(7,524 pass / 5 intentional skips) pass. `GameWindow` is 4,057 raw lines / 198
+fields / 54 methods.
+
 ### G — two-phase runtime settings
 
 - Construct `RuntimeSettingsController` before Window.Create and source startup