Add MiniMax API support, Apple Container runtime, and stop script

- Add ASSISTANT_NAME and claude-minimax.sh for MiniMax API usage
- Switch container runtime from Docker to Apple Container
- Add CJK character restriction notice to CLAUDE.md files
- Add stop.sh for graceful shutdown

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

CLAUDE.md

@@ -1,5 +1,16 @@
 # NanoClaw
 
+**CRITICAL — NO CHINESE/JAPANESE CHARACTERS**
+
+You MUST write in Korean (한글) and English only. Chinese characters (漢字/Hanja), Japanese kanji, and Japanese-Romaji mixed text (オペレーション, インストール, etc.) are STRICTLY FORBIDDEN in all your responses. This applies to ALL output — code, comments, documentation, and conversation. Use pure Korean or English equivalents.
+
+Examples of violations (절대 사용 금지):
+- 漢字, 適用, 確認, 完了, 問題, 報告
+- オペレーション, インストール, コンテンツ, パスワード, プログラム
+- Any CJK Unified Ideographs (U+4E00–U+9FFF)
+
+---
+
 Personal Claude assistant. See [README.md](README.md) for philosophy and setup. See [docs/REQUIREMENTS.md](docs/REQUIREMENTS.md) for architecture decisions.
 
 ## Quick Context