restore alt-view (space hold) toggle

InputHandler still emits AlternateViewEvent on space down/up, and the
renderer still has setAltView. The bridge between them lived in
MapInteraction's applyAltView, which got deleted with the rest of
MapInteraction — nothing was wiring the event to the view anymore.
Expose view.setAltView and have ClientGameRunner subscribe.

src/client/ClientGameRunner.ts

@@ -37,6 +37,7 @@ import {
 import { WorkerClient } from "../core/worker/WorkerClient";
 import { getPersistentID } from "./Auth";
 import {
+  AlternateViewEvent,
   AutoUpgradeEvent,
   DoBoatAttackEvent,
   DoBreakAllianceEvent,
@@ -445,6 +446,11 @@ async function createClientGame(
       (e) => applyDayNightMode((e as CustomEvent<string>).detail === "true"),
     );
 
+    // Space-hold (and the settings-modal toggle) drives the affiliation
+    // recolor. InputHandler emits AlternateViewEvent; the WebGL view needs
+    // setAltView called to switch passes into alt mode.
+    eventBus.on(AlternateViewEvent, (e) => view.setAltView(e.alternateView));
+
     const gameRenderer = createRenderer(
       inputOverlay,
       gameView,

src/client/render/gl/GameView.ts

@@ -321,6 +321,9 @@ export class GameView {
   setLocalPlayerID(id: number): void {
     this.renderer.setLocalPlayerID(id);
   }
+  setAltView(active: boolean): void {
+    this.renderer.setAltView(active);
+  }
   setHighlightOwner(ownerID: number): void {
     this.renderer.setHighlightOwner(ownerID);
   }