Release v3.18.4

[3.18.4] - 2025-05-25

• Fix codebase indexing settings saving and Ollama indexing (thanks @daniel-lxs!)
• Fix handling BOM when user rejects apply_diff (thanks @avtc!)
• Fix wrongfully clearing input on auto-approve (thanks @Ruakij!)
• Fix correct spawnSync parameters for pnpm check in bootstrap.mjs (thanks @ChuKhaLi!)
• Update xAI models and default model ID (thanks @PeterDaveHello!)
• Add metadata to create message (thanks @dtrugman!)