Support number keys for battle save slots

src/game/scenes/BattleScene.ts

@@ -3069,6 +3069,7 @@ export class BattleScene extends Phaser.Scene {
   private resultAnimationToken = 0;
   private resultSettlementText?: Phaser.GameObjects.Text;
   private saveSlotPanelObjects: Phaser.GameObjects.GameObject[] = [];
+  private saveSlotPanelMode?: SaveSlotMode;
   private unitViews = new Map<string, UnitView>();
   private actedUnitIds = new Set<string>();
   private bondStates = new Map<string, BondState>();
@@ -3215,6 +3216,9 @@ export class BattleScene extends Phaser.Scene {
         this.refreshUnitLegibilityStyles();
       }
     });
+    this.input.keyboard?.on('keydown', (event: KeyboardEvent) => {
+      this.handleSaveSlotPanelKey(event);
+    });
     this.input.keyboard?.on('keydown-SPACE', (event: KeyboardEvent) => {
       if (this.activeFaction !== 'enemy' || this.fastForwardHeld) {
         return;
@@ -11150,8 +11154,40 @@ export class BattleScene extends Phaser.Scene {
     return Array.from({ length: campaignSaveSlotCount }, (_, index) => index + 1).some((slot) => Boolean(this.readBattleSaveState(slot)));
   }
 
+  private handleSaveSlotPanelKey(event: KeyboardEvent) {
+    if (!this.saveSlotPanelMode) {
+      return false;
+    }
+
+    const slot = Number(event.key);
+    if (!Number.isInteger(slot) || slot < 1 || slot > campaignSaveSlotCount) {
+      return false;
+    }
+
+    event.preventDefault();
+    this.activateSaveSlotPanelSlot(slot);
+    return true;
+  }
+
+  private activateSaveSlotPanelSlot(slot: number) {
+    const mode = this.saveSlotPanelMode;
+    if (!mode || (mode === 'load' && !this.readBattleSaveState(slot))) {
+      return;
+    }
+
+    this.suppressNextLeftClick = true;
+    soundDirector.playSelect();
+    if (mode === 'save') {
+      this.showSaveBattleConfirm(slot);
+      return;
+    }
+
+    this.showLoadBattleConfirm(slot);
+  }
+
   private showSaveSlotPanel(mode: SaveSlotMode) {
     this.hideSaveSlotPanel();
+    this.saveSlotPanelMode = mode;
     this.clearPointerFeedback();
     const depth = 70;
     const width = 520;
@@ -11226,13 +11262,7 @@ export class BattleScene extends Phaser.Scene {
 
       if (!disabled) {
         const run = () => {
-          this.suppressNextLeftClick = true;
-          soundDirector.playSelect();
-          if (mode === 'save') {
-            this.showSaveBattleConfirm(slot);
-          } else {
-            this.showLoadBattleConfirm(slot);
-          }
+          this.activateSaveSlotPanelSlot(slot);
         };
         row.setInteractive({ useHandCursor: true });
         row.on('pointerover', () => row.setFillStyle(0x263647, 0.98));
@@ -11264,6 +11294,7 @@ export class BattleScene extends Phaser.Scene {
   private hideSaveSlotPanel() {
     this.saveSlotPanelObjects.forEach((object) => object.destroy());
     this.saveSlotPanelObjects = [];
+    this.saveSlotPanelMode = undefined;
   }
 
   private showSaveBattleConfirm(slot: number) {
@@ -17214,6 +17245,7 @@ export class BattleScene extends Phaser.Scene {
       commandMenuVisible: this.commandMenuObjects.length > 0,
       mapMenuVisible: this.mapMenuObjects.length > 0,
       saveSlotPanelVisible: this.saveSlotPanelObjects.length > 0,
+      saveSlotPanelMode: this.saveSlotPanelMode ?? null,
       resultVisible: this.resultObjects.length > 0,
       turnPromptVisible: this.turnPromptObjects.length > 0,
       turnPromptMode: this.turnPromptMode ?? null,