🐛 fix(ai): 隐藏 Claude CLI 后台控制台窗口

- 统一认证检查、非流式与流式请求的 Claude CLI 命令创建
- Windows 启用 HideWindow 与 CREATE_NO_WINDOW，并保留已有启动标志
- 增加跨平台进程配置与 Windows 回归测试

internal/ai/provider/claude_cli.go

@@ -137,7 +137,7 @@ func CheckClaudeCLILocalAuth(ctx context.Context) error {
 	defer cancel()
 
 	args := append(buildClaudeCLILocalAuthIsolationArgs(), "auth", "status", "--json")
-	cmd := claudeCommandContext(ctx, command.Path, args...)
+	cmd := newClaudeCLICommand(ctx, command.Path, args...)
 	env, err := buildClaudeCLIEnv(ai.ProviderConfig{AuthMode: "local-cli"}, cmd.Environ(), runtime.GOOS, claudeLookPath, fileExists)
 	if err != nil {
 		return err
@@ -224,7 +224,7 @@ func (p *ClaudeCLIProvider) Chat(ctx context.Context, req ai.ChatRequest) (*ai.C
 	if err != nil {
 		return nil, err
 	}
-	cmd := claudeCommandContext(ctx, command.Path, args...)
+	cmd := newClaudeCLICommand(ctx, command.Path, args...)
 	if err := p.setEnv(cmd); err != nil {
 		return nil, err
 	}
@@ -301,7 +301,7 @@ func (p *ClaudeCLIProvider) ChatStream(ctx context.Context, req ai.ChatRequest,
 	if err != nil {
 		return err
 	}
-	cmd := claudeCommandContext(ctx, command.Path, args...)
+	cmd := newClaudeCLICommand(ctx, command.Path, args...)
 	if err := p.setEnv(cmd); err != nil {
 		return err
 	}
@@ -469,6 +469,12 @@ func isClaudeCLITimeout(ctx context.Context, err error) bool {
 	return errors.Is(ctx.Err(), context.DeadlineExceeded) || errors.Is(err, context.DeadlineExceeded)
 }
 
+func newClaudeCLICommand(ctx context.Context, name string, args ...string) *exec.Cmd {
+	cmd := claudeCommandContext(ctx, name, args...)
+	configureClaudeCLICommand(cmd)
+	return cmd
+}
+
 func claudeCLIEndpointForLog(config ai.ProviderConfig) string {
 	baseURL := strings.TrimRight(strings.TrimSpace(config.BaseURL), "/")
 	if baseURL != "" {

internal/ai/provider/claude_cli_process_other.go

@@ -0,0 +1,7 @@
+//go:build !windows
+
+package provider
+
+import "os/exec"
+
+func configureClaudeCLICommand(_ *exec.Cmd) {}

internal/ai/provider/claude_cli_process_windows.go

@@ -0,0 +1,21 @@
+//go:build windows
+
+package provider
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+const claudeCLIWindowsCreateNoWindow uint32 = 0x08000000
+
+func configureClaudeCLICommand(cmd *exec.Cmd) {
+	if cmd == nil {
+		return
+	}
+	if cmd.SysProcAttr == nil {
+		cmd.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	cmd.SysProcAttr.HideWindow = true
+	cmd.SysProcAttr.CreationFlags |= claudeCLIWindowsCreateNoWindow
+}

internal/ai/provider/claude_cli_process_windows_test.go

@@ -0,0 +1,31 @@
+//go:build windows
+
+package provider
+
+import (
+	"os/exec"
+	"syscall"
+	"testing"
+)
+
+func TestConfigureClaudeCLICommandHidesWindowsConsole(t *testing.T) {
+	const existingCreationFlag uint32 = 0x00000004
+	cmd := &exec.Cmd{
+		SysProcAttr: &syscall.SysProcAttr{CreationFlags: existingCreationFlag},
+	}
+
+	configureClaudeCLICommand(cmd)
+
+	if cmd.SysProcAttr == nil {
+		t.Fatal("expected Windows process attributes to be configured")
+	}
+	if !cmd.SysProcAttr.HideWindow {
+		t.Fatal("expected Claude CLI window to be hidden")
+	}
+	if cmd.SysProcAttr.CreationFlags&claudeCLIWindowsCreateNoWindow == 0 {
+		t.Fatalf("expected CREATE_NO_WINDOW, got creation flags %#x", cmd.SysProcAttr.CreationFlags)
+	}
+	if cmd.SysProcAttr.CreationFlags&existingCreationFlag == 0 {
+		t.Fatalf("expected existing creation flags to be preserved, got %#x", cmd.SysProcAttr.CreationFlags)
+	}
+}