Refresh selected-building panel when paused player commands drain

Option A made the per-tick refresh authoritative for the shipyard layout
preview and Configure Layout button, but that path is driven by
TickAdvancedEvent, which only fires while the game is running. Choosing a
schematic while paused therefore still left the widgets hidden until the
game was unpaused or the building re-selected, because the queued
SetRecipeCommand drains on the next frame but no tick advances.

Emit a new PlayerCommandsAppliedEvent from GameWorldView::onFrame once per
frame when queued commands were drained, and have SelectedBuildingPanel
refresh its selection display in response. This is a presentation-only
notification: it is emitted only on the live path (not during replay
playback), touches neither the command queue nor the simulation, and its
only handler never enqueues commands -- so replay recording and
determinism are unaffected.

Factor the former TickAdvancedEvent handler body into
refreshSelectionDisplay() and call it from both handlers to avoid
duplication.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DyCu8vwChKMbLJQ3xosYEN

src/lib/eventsystem/event/CMakeLists.txt

@@ -31,6 +31,7 @@ SET(HDRS
 	${CMAKE_CURRENT_SOURCE_DIR}/BeamFiredEvent.h
 	${CMAKE_CURRENT_SOURCE_DIR}/DebugDrawToggledEvent.h
 	${CMAKE_CURRENT_SOURCE_DIR}/CommandRequestedEvent.h
+	${CMAKE_CURRENT_SOURCE_DIR}/PlayerCommandsAppliedEvent.h
 	PARENT_SCOPE
 )