🔧 fix(driver-agent): 修复 Windows 启动驱动代理弹出终端窗口

- 为 Windows 新增 agent 进程启动参数（HideWindow + CREATE_NO_WINDOW）
- optional driver agent 启动路径统一应用进程隐藏配置
- MySQL agent 启动路径同步应用进程隐藏配置

internal/db/agent_process_stub.go

@@ -0,0 +1,9 @@
+//go:build !windows
+
+package db
+
+import "os/exec"
+
+func configureAgentProcess(cmd *exec.Cmd) {
+	_ = cmd
+}

internal/db/agent_process_windows.go

@@ -0,0 +1,20 @@
+//go:build windows
+
+package db
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+const windowsCreateNoWindow = 0x08000000
+
+func configureAgentProcess(cmd *exec.Cmd) {
+	if cmd == nil {
+		return
+	}
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    true,
+		CreationFlags: windowsCreateNoWindow,
+	}
+}

internal/db/mysql_agent_impl.go

@@ -72,6 +72,7 @@ func newMySQLAgentClient(executablePath string) (*mysqlAgentClient, error) {
 	}
 
 	cmd := exec.Command(pathText)
+	configureAgentProcess(cmd)
 	stdin, err := cmd.StdinPipe()
 	if err != nil {
 		return nil, fmt.Errorf("创建 MySQL 驱动代理 stdin 失败：%w", err)

internal/db/optional_driver_agent_impl.go

@@ -73,6 +73,7 @@ func newOptionalDriverAgentClient(driverType string, executablePath string) (*op
 	}
 
 	cmd := exec.Command(pathText)
+	configureAgentProcess(cmd)
 	stdin, err := cmd.StdinPipe()
 	if err != nil {
 		return nil, fmt.Errorf("创建 %s 驱动代理 stdin 失败：%w", driverDisplayName(driverType), err)