Support number keys for campaign save slots

src/game/scenes/CampScene.ts

@@ -10755,6 +10755,7 @@ export class CampScene extends Phaser.Scene {
     this.selectedVisitId = this.availableCampVisits()[0]?.id ?? campVisits[0].id;
     soundDirector.playMusic('militia-theme');
     this.input.keyboard?.on('keydown-ESC', () => this.handleEscapeKey());
+    this.input.keyboard?.on('keydown', (event: KeyboardEvent) => this.handleSaveSlotKey(event));
     loadBattleUiIcons(this, () => this.ensureCampAssets(() => this.drawCampScene()));
   }
 
@@ -11980,6 +11981,20 @@ export class CampScene extends Phaser.Scene {
     this.render();
   }
 
+  private handleSaveSlotKey(event: KeyboardEvent) {
+    if (this.saveSlotObjects.length === 0) {
+      return;
+    }
+
+    const slot = Number(event.key);
+    if (!Number.isInteger(slot) || slot < 1 || slot > campaignSaveSlotCount) {
+      return;
+    }
+
+    event.preventDefault();
+    this.saveCampToSlot(slot);
+  }
+
   private hideCampSaveSlotPanel() {
     this.saveSlotObjects.forEach((object) => object.destroy());
     this.saveSlotObjects = [];