fix: Battle 快捷键通过 inputRef 转发至主 Ink 上下文

BattleFlow 不再直接调用 useInput（外部包的 Ink 上下文可能不同），
改为暴露 handleInput 方法，由 BuddyPanel 中的 BattleTab 通过
useInput + ref 转发键盘事件，确保在正确的 StdinContext 中工作。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/commands/buddy/BuddyPanel.tsx

@@ -1,5 +1,5 @@
 import * as React from 'react';
-import { useState } from 'react';
+import { useState, useRef } from 'react';
 import { Box, Text, Pane, Tab, Tabs, useInput, type Color } from '@anthropic/ink';
 import { useSetAppState } from '../../state/AppState.js';
 import { useKeybinding } from '../../keybindings/useKeybinding.js';
@@ -22,6 +22,7 @@ import { getXpProgress } from '@claude-code-best/pokemon';
 import { getGenderSymbol } from '@claude-code-best/pokemon';
 import { StatBar, SpriteAnimator, getFallbackSprite, loadSprite } from '@claude-code-best/pokemon';
 import { BattleFlow, loadBuddyData } from '@claude-code-best/pokemon';
+import type { BattleFlowHandle } from '@claude-code-best/pokemon';
 import type { LocalJSXCommandOnDone } from '../../types/command.js';
 
 const CYAN: Color = 'ansi:cyan';
@@ -633,6 +634,13 @@ function BattleTab({
   onUpdate: (data: BuddyData) => void;
 }) {
   const [battleKey, setBattleKey] = useState(0);
+  const inputRef = useRef<BattleFlowHandle | null>(null);
+
+  // Handle input here (in main app's Ink context) and forward to BattleFlow via ref
+  useInput((input, key) => {
+    if (!isActive) return;
+    inputRef.current?.handleInput(input, key);
+  });
 
   const handleClose = async () => {
     const updated = await loadBuddyData();
@@ -646,6 +654,7 @@ function BattleTab({
       buddyData={buddyData}
       onClose={handleClose}
       isActive={isActive}
+      inputRef={inputRef}
     />
   );
 }