fix(merge): 修复master合并后的编译和测试问题

在重构代码后合并master分支时需要的适配:

1. **接口定义恢复** (executor.go)
   - 添加 commandRunner 和 processHandle 接口
   - 实现 realCmd 和 realProcess 适配器
   - 添加 newCommandRunner 测试钩子

2. **TaskResult扩展** (config.go)
   - 添加 LogPath 字段支持日志路径跟踪
   - 在 generateFinalOutput 中输出 LogPath

3. **原子变量适配** (main.go, executor.go)
   - forceKillDelay 从int改为 atomic.Int32
   - 添加测试钩子: cleanupLogsFn, signalNotifyFn, signalStopFn
   - 添加 stdout 关闭原因常量

4. **功能函数添加**
   - runStartupCleanup: 启动时清理旧日志
   - runCleanupMode: --cleanup 模式处理
   - forceKillTimer 类型和 terminateCommand 函数
   - terminateProcess nil 安全检查

5. **测试适配** (logger_test.go, main_test.go)
   - 将 *exec.Cmd 包装为 &realCmd{cmd}
   - 修复 forwardSignals 等函数调用

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

codeagent-wrapper/main.go

@@ -6,8 +6,10 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"os/signal"
 	"strings"
 	"sync/atomic"
+	"time"
 )
 
 const (
@@ -19,6 +21,12 @@ const (
 	stderrCaptureLimit = 4 * 1024
 	defaultBackendName = "codex"
 	wrapperName        = "codeagent-wrapper"
+
+	// stdout close reasons
+	stdoutCloseReasonWait  = "wait-done"
+	stdoutCloseReasonDrain = "drain-timeout"
+	stdoutCloseReasonCtx   = "context-cancel"
+	stdoutDrainTimeout     = 100 * time.Millisecond
 )
 
 // Test hooks for dependency injection
@@ -29,13 +37,68 @@ var (
 	cleanupHook  func()
 	loggerPtr    atomic.Pointer[Logger]
 
-	buildCodexArgsFn = buildCodexArgs
-	selectBackendFn  = selectBackend
-	commandContext   = exec.CommandContext
-	jsonMarshal      = json.Marshal
-	forceKillDelay   = 5 // seconds - made variable for testability
+	buildCodexArgsFn   = buildCodexArgs
+	selectBackendFn    = selectBackend
+	commandContext     = exec.CommandContext
+	jsonMarshal        = json.Marshal
+	cleanupLogsFn      = cleanupOldLogs
+	signalNotifyFn     = signal.Notify
+	signalStopFn       = signal.Stop
+	terminateCommandFn = terminateCommand
 )
 
+var forceKillDelay atomic.Int32
+
+func init() {
+	forceKillDelay.Store(5) // seconds - default value
+}
+
+func runStartupCleanup() {
+	if cleanupLogsFn == nil {
+		return
+	}
+	defer func() {
+		if r := recover(); r != nil {
+			logWarn(fmt.Sprintf("cleanupOldLogs panic: %v", r))
+		}
+	}()
+	if _, err := cleanupLogsFn(); err != nil {
+		logWarn(fmt.Sprintf("cleanupOldLogs error: %v", err))
+	}
+}
+
+func runCleanupMode() int {
+	if cleanupLogsFn == nil {
+		fmt.Fprintln(os.Stderr, "Cleanup failed: log cleanup function not configured")
+		return 1
+	}
+
+	stats, err := cleanupLogsFn()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Cleanup failed: %v\n", err)
+		return 1
+	}
+
+	fmt.Println("Cleanup completed")
+	fmt.Printf("Files scanned: %d\n", stats.Scanned)
+	fmt.Printf("Files deleted: %d\n", stats.Deleted)
+	if len(stats.DeletedFiles) > 0 {
+		for _, f := range stats.DeletedFiles {
+			fmt.Printf("  - %s\n", f)
+		}
+	}
+	fmt.Printf("Files kept: %d\n", stats.Kept)
+	if len(stats.KeptFiles) > 0 {
+		for _, f := range stats.KeptFiles {
+			fmt.Printf("  - %s\n", f)
+		}
+	}
+	if stats.Errors > 0 {
+		fmt.Printf("Deletion errors: %d\n", stats.Errors)
+	}
+	return 0
+}
+
 func main() {
 	exitCode := run()
 	os.Exit(exitCode)
@@ -52,6 +115,8 @@ func run() (exitCode int) {
 		case "--help", "-h":
 			printHelp()
 			return 0
+		case "--cleanup":
+			return runCleanupMode()
 		}
 	}