Implement bd daemons killall and logs (bd-153, bd-152)

Amp-Thread-ID: https://ampcode.com/threads/T-f1cff202-188b-4850-a909-c2750d24ad22
Co-authored-by: Amp <amp@ampcode.com>

internal/daemon/kill_windows.go

@@ -3,16 +3,46 @@
 package daemon
 
 import (
+	"bytes"
 	"fmt"
 	"os/exec"
 	"strconv"
+	"strings"
 )
 
 func killProcess(pid int) error {
-	// Use taskkill on Windows
-	cmd := exec.Command("taskkill", "/PID", strconv.Itoa(pid), "/F")
+	// Use taskkill on Windows (without /F for graceful)
+	cmd := exec.Command("taskkill", "/PID", strconv.Itoa(pid))
 	if err := cmd.Run(); err != nil {
 		return fmt.Errorf("failed to kill PID %d: %w", pid, err)
 	}
 	return nil
 }
+
+func forceKillProcess(pid int) error {
+	// Use taskkill with /F flag for force kill
+	cmd := exec.Command("taskkill", "/PID", strconv.Itoa(pid), "/F")
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed to force kill PID %d: %w", pid, err)
+	}
+	return nil
+}
+
+func isProcessAlive(pid int) bool {
+	// Use tasklist to check if process exists
+	cmd := exec.Command("tasklist", "/FI", fmt.Sprintf("PID eq %d", pid), "/NH")
+	output, err := cmd.Output()
+	if err != nil {
+		return false
+	}
+	// Check if output contains the PID
+	return contains(string(output), strconv.Itoa(pid))
+}
+
+func contains(s, substr string) bool {
+	return findSubstring(s, substr)
+}
+
+func findSubstring(s, substr string) bool {
+	return len(s) >= len(substr) && bytes.Contains([]byte(s), []byte(substr))
+}