client: Windows 客户端（WinUI3 壳 + agent-core；调试用 Electron 壳存档）；localserver token 改为常数时间比较

client/core/internal/exec/fake/fake.go

@@ -0,0 +1,46 @@
+// fake 假执行器：D8 闭环验收用，模拟平台执行（延迟后返回成功）。
+package fake
+
+import (
+	"context"
+	"time"
+
+	"everypublish/agentcore/internal/exec"
+	"everypublish/shared/proto"
+)
+
+// Executor 假执行器（可作兜底：任何平台都返回成功）
+type Executor struct {
+	SimMS int
+}
+
+// Platform 空串表示通用（注册为兜底）
+func (e Executor) Platform() string { return "" }
+
+// Execute 模拟执行：延迟 SimMS 后返回成功
+func (e Executor) Execute(ctx context.Context, task exec.Task) exec.Result {
+	select {
+	case <-time.After(time.Duration(e.SimMS) * time.Millisecond):
+	case <-ctx.Done():
+		return exec.Result{TaskID: task.TaskID, Status: "failed", Error: "cancelled"}
+	}
+	return exec.Result{
+		TaskID:       task.TaskID,
+		Status:       "success",
+		PublishedURL: "https://example.com/fake/" + task.TaskID,
+		Receipts:     []string{},
+	}
+}
+
+// SolveChallenge 模拟扫码：延迟后返回已解决
+func (e Executor) SolveChallenge(ctx context.Context, ch proto.Challenge, onQR func(qrToken, qrURL string)) (bool, string) {
+	if onQR != nil {
+		onQR("fake-qr-token", "https://example.com/fake-qr")
+	}
+	select {
+	case <-time.After(time.Duration(e.SimMS) * time.Millisecond):
+	case <-ctx.Done():
+		return false, ""
+	}
+	return true, "fake-qr-token"
+}