Complete log path migration to StateDirResolver for adapters

[stevendinggang]

Summary

Completes the logging path migration that was partially done in feat/bootstrap-command.

• codex-adapter.ts and claude-adapter.ts still hardcoded /tmp/agentbridge.log
• bridge.ts and daemon.ts had already been migrated to stateDir.logFile

This PR finishes the migration so all four components use the same resolved log path.

Closes #21

Changes

• src/codex-adapter.ts: Remove hardcoded LOG_FILE, accept logFile via constructor (defaults to StateDirResolver().logFile)
• src/claude-adapter.ts: Same pattern — remove LOG_FILE constant, accept injectable logFile
• src/daemon.ts: Pass stateDir.logFile to CodexAdapter
• src/bridge.ts: Add stateDir.ensure(), pass stateDir.logFile to ClaudeAdapter

Design notes

• Constructor defaults use new StateDirResolver().logFile so existing callers (including tests) work without changes
• No new dependencies — StateDirResolver was already in the codebase
• Backward compatible — zero test changes needed

Test plan

• bun run typecheck passes
• bun test src passes

🤖 Generated with Claude Code

[raysonmeng]

Code Review / 代码审查

Thanks for this contribution! The log path migration logic is correct and well-structured.

感谢你的贡献！日志路径迁移的逻辑正确，结构清晰。

Approved with requested changes / 批准，需要以下修改

1. Rebase required / 需要 Rebase

This PR was created before PR #38 (server-to-client request passthrough) was merged. codex-adapter.ts has changed significantly since then — new PendingServerRequest interface, handleServerRequest() method, serverRequestToProxy map, etc. Please rebase onto current master and resolve conflicts.

这个 PR 创建时 PR #38 还没合并。codex-adapter.ts 之后有较大改动（新增 PendingServerRequest 接口、handleServerRequest() 方法等）。请 rebase 到最新 master 并解决冲突。

2. Base branch / 基础分支

The PR targets feat/bootstrap-command instead of master. Please change the base branch to master.

PR 的目标分支是 feat/bootstrap-command 而非 master，请修改为 master。

3. Suggestion: constructor default / 建议：构造函数默认值

The default logFile = new StateDirResolver().logFile works but creates unnecessary coupling. Since both callers (bridge.ts and daemon.ts) always pass logFile explicitly, consider either making it required or using a simpler fallback:

默认值 logFile = new StateDirResolver().logFile 可以工作但引入了不必要的耦合。因为调用方都会显式传入 logFile，建议改为必传参数或使用更简单的 fallback：

// Option A: required parameter / 必传参数
constructor(logFile: string)

// Option B: simple fallback / 简单 fallback
constructor(logFile = "/tmp/agentbridge.log")

After rebasing and addressing these points, this is ready to merge!
Rebase 并修改后即可合并！

🤖 Reviewed by Claude + Codex via AgentBridge

[raysonmeng]

Superseded by PR #63 — 直接基于 master 重做，避免 feat/bootstrap-command 的冲突。