Version: 0.9.59.dev.260430

后端：
1. 主动调度预览确认主链路落地——新增主动调度数据模型、DAO 与事件契约；接入 dry-run pipeline 与任务触发的 job upsert/cancel；新增 preview 查询与 confirm API，支持 apply_id 幂等确认并同步写入 task_pool 日程
2. 同步更新主动调度实施文档的阶段状态与验收记录

前端：
3. AssistantPanel 脚本层继续解耦——私有类型迁移到独立类型文件，并抽离会话、工具轨迹、思考摘要、任务表单等纯函数辅助逻辑；保持助手面板模板与样式不变，降低表现层回归风险

backend/active_scheduler/context/context.go

@@ -0,0 +1,94 @@
+package schedulercontext
+
+import (
+	"time"
+
+	"github.com/LoveLosita/smartflow/backend/active_scheduler/ports"
+	"github.com/LoveLosita/smartflow/backend/active_scheduler/trigger"
+)
+
+const (
+	WindowReasonRolling24H = "rolling_24h"
+)
+
+// ActiveScheduleContext 是主动调度 dry-run 的只读事实快照。
+//
+// 职责边界：
+// 1. 负责承载 BuildContext 阶段聚合出的事实；
+// 2. 不包含 DAO、service 或 provider 实例；
+// 3. 不负责生成候选，也不负责写 preview、通知或正式日程。
+type ActiveScheduleContext struct {
+	Trigger       trigger.ActiveScheduleTrigger
+	User          UserFacts
+	Now           NowFacts
+	Window        WindowFacts
+	Target        TargetFacts
+	TaskPoolFacts TaskPoolFacts
+	ScheduleFacts ScheduleFacts
+	FeedbackFacts FeedbackFacts
+	DerivedFacts  DerivedFacts
+	Trace         TraceFacts
+}
+
+type UserFacts struct {
+	UserID   int
+	Timezone string
+}
+
+type NowFacts struct {
+	RealNow      time.Time
+	EffectiveNow time.Time
+}
+
+type WindowFacts struct {
+	StartAt       time.Time
+	EndAt         time.Time
+	RelativeSlots []ports.Slot
+	WindowReason  string
+}
+
+type TargetFacts struct {
+	SourceType         trigger.TargetType
+	TaskID             int
+	ScheduleEventID    int
+	TaskItemID         int
+	Title              string
+	EstimatedSections  int
+	DeadlineAt         *time.Time
+	UrgencyThresholdAt *time.Time
+	Priority           int
+	Status             string
+}
+
+type TaskPoolFacts struct {
+	TargetTask *ports.TaskFact
+}
+
+type ScheduleFacts struct {
+	Events          []ports.ScheduleEventFact
+	OccupiedSlots   []ports.Slot
+	FreeSlots       []ports.Slot
+	NextDynamicTask *ports.ScheduleEventFact
+}
+
+type FeedbackFacts struct {
+	FeedbackID       string
+	FeedbackText     string
+	FeedbackTarget   string
+	TargetKnown      bool
+	TargetEventID    int
+	TargetTaskItemID int
+}
+
+type DerivedFacts struct {
+	TargetAlreadyScheduled bool
+	TargetCompleted        bool
+	AvailableCapacity      int
+	MissingInfo            []string
+}
+
+type TraceFacts struct {
+	TraceID    string
+	BuildSteps []string
+	Warnings   []string
+}