feat: 新增 /pokemon-battle 独立战斗命令，从 BuddyPanel 移除 Battle tab

- 新增 /pokemon-battle 命令，独立全屏战斗面板
- BattlePanel 在主 app Ink 上下文中使用 useInput，通过 inputRef 转发事件
- BuddyPanel 恢复为 Buddy/Pokédex/Egg 三 tab
- BattleFlow 移除内部 useInput，改为暴露 handleInput 方法

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

src/commands/pokemon-battle/index.ts

@@ -0,0 +1,15 @@
+import type { Command } from '../../commands.js'
+import { isBuddyLive } from '../../buddy/useBuddyNotification.js'
+
+const pokemonBattle = {
+  type: 'local-jsx',
+  name: 'pokemon-battle',
+  description: 'Start a Pokémon battle',
+  immediate: true,
+  get isHidden() {
+    return !isBuddyLive()
+  },
+  load: () => import('./pokemon-battle.js'),
+} satisfies Command
+
+export default pokemonBattle

src/commands/pokemon-battle/pokemon-battle.ts

@@ -0,0 +1,71 @@
+import React, { useState, useRef } from 'react'
+import { useInput } from '@anthropic/ink'
+import {
+  loadBuddyData,
+  saveBuddyData,
+  getActiveCreature,
+  BattleFlow,
+  type BuddyData,
+  type BattleFlowHandle,
+} from '@claude-code-best/pokemon'
+import type { ToolUseContext } from '../../Tool.js'
+import type {
+  LocalJSXCommandContext,
+  LocalJSXCommandOnDone,
+} from '../../types/command.js'
+
+async function getOrInitBuddyData(): Promise<BuddyData> {
+  let data = await loadBuddyData()
+  if (!getActiveCreature(data)) {
+    data = await loadBuddyData()
+  }
+  return data
+}
+
+export async function call(
+  onDone: LocalJSXCommandOnDone,
+  _context: ToolUseContext & LocalJSXCommandContext,
+  _args: string,
+): Promise<React.ReactNode> {
+  const data = await getOrInitBuddyData()
+
+  if (!getActiveCreature(data)) {
+    onDone('No companion yet · run /buddy first', { display: 'system' })
+    return null
+  }
+
+  return React.createElement(BattlePanel, {
+    buddyData: data,
+    onClose: () => {
+      onDone('battle closed', { display: 'system' })
+    },
+  })
+}
+
+function BattlePanel({
+  buddyData,
+  onClose,
+}: {
+  buddyData: BuddyData
+  onClose: () => void
+}) {
+  const [battleKey, setBattleKey] = useState(0)
+  const inputRef = useRef<BattleFlowHandle | null>(null)
+
+  useInput((input, key) => {
+    inputRef.current?.handleInput(input, key)
+  })
+
+  const handleClose = async () => {
+    const updated = await loadBuddyData()
+    setBattleKey(k => k + 1)
+  }
+
+  return React.createElement(BattleFlow, {
+    key: battleKey,
+    buddyData,
+    onClose,
+    isActive: true,
+    inputRef,
+  })
+}