feat(session): include tool_use input in extracted text

[xu-song]

Summary

Render tool_use content blocks with their input payload alongside the tool name when extracting text from session messages. Previously summaries only showed [Tool: name], making it impossible to tell what a tool was invoked with.

After:

[Tool: Edit]
{
  "file_path": "src/foo.ts",
  ...
}

If input is missing or null, behavior is unchanged.

Related Issue

Screenshots / 截图

Before / 修改前	After / 修改后

Checklist / 检查清单

• pnpm typecheck passes / 通过 TypeScript 类型检查
• pnpm format:check passes / 通过代码格式检查
• cargo clippy passes (if Rust code changed) / 通过 Clippy 检查（如修改了 Rust 代码）
• Updated i18n files if user-facing text changed / 如修改了用户可见文本，已更新国际化文件

[farion1231]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Breezy!

Reviewed commit: 06cca1ea8e

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