retire DynamicUILayer, restore warship UX on WebGL

DynamicUILayer was a canvas2D mix of: bonus-event gold/troops popups
(already duplicated by WebGL BonusPopupPass), nuke/transport telegraph
indicators (duplicated by WebGL passes), and a warship move-indicator
chevron drawn via MoveIndicatorUI. Delete the layer outright along
with its three orphan UI helpers (MoveIndicatorUI, NavalTarget,
NukeTelegraph).

That deletion uncovered a pre-existing bug from the "migrate away from
canvas" commit: warship select/move no longer worked. The deleted
UnitLayer had owned the click flow that emits MoveWarshipIntentEvent.
Re-add the flow inside UILayer (which already tracks selected /
multi-selected warships for its selection box): MouseUpEvent →
move-multi → move-single → select-nearest, plus shift+drag box
complete and select-all hotkey.

Wire MoveWarshipIntentEvent → view.showMoveIndicator(tx, ty, ownerID)
in mountWebGLDebugRenderer so the WebGL MoveIndicatorPass draws the
converging-chevron animation at the move target, colored by the
warship's owner. mountWebGLDebugRenderer now takes gameView + eventBus
to resolve the owner and subscribe.

src/client/graphics/GameRenderer.ts

@@ -13,7 +13,6 @@ import { BuildMenu } from "./layers/BuildMenu";
 import { ChatDisplay } from "./layers/ChatDisplay";
 import { ChatModal } from "./layers/ChatModal";
 import { ControlPanel } from "./layers/ControlPanel";
-import { DynamicUILayer } from "./layers/DynamicUILayer";
 import { EmojiTable } from "./layers/EmojiTable";
 import { EventsDisplay } from "./layers/EventsDisplay";
 import { GameLeftSidebar } from "./layers/GameLeftSidebar";
@@ -265,7 +264,6 @@ export function createRenderer(
   const layers: Layer[] = [
     new UILayer(game, eventBus, transformHandler),
     new StructureIconsLayer(game, eventBus, uiState, transformHandler),
-    new DynamicUILayer(game, transformHandler, eventBus),
     new NameLayer(game, transformHandler, eventBus),
     new AttackingTroopsOverlay(game, transformHandler, eventBus, userSettings),
     eventsDisplay,