refactor: Agent驱动重构，整章写入替代场景拼接

tools/plan_chapter.go

@@ -10,7 +10,7 @@ import (
 	"github.com/voocel/ainovel-cli/state"
 )
 
-// PlanChapterTool 生成章节规划。
+// PlanChapterTool 保存章节构思，Agent 自主决定规划粒度。
 type PlanChapterTool struct {
 	store *state.Store
 }
@@ -21,25 +21,19 @@ func NewPlanChapterTool(store *state.Store) *PlanChapterTool {
 
 func (t *PlanChapterTool) Name() string { return "plan_chapter" }
 func (t *PlanChapterTool) Description() string {
-	return "创建章节写作规划，包括目标、冲突、场景拆分和钩子设计。必须在 write_scene 之前调用"
+	return "保存章节写作构思。Agent 自主决定规划粒度，不强制场景拆分"
 }
 func (t *PlanChapterTool) Label() string { return "规划章节" }
 
 func (t *PlanChapterTool) Schema() map[string]any {
-	sceneSchema := schema.Object(
-		schema.Property("index", schema.Int("场景编号，从 1 开始")).Required(),
-		schema.Property("summary", schema.String("场景概要")).Required(),
-		schema.Property("pov", schema.String("视角人物")),
-		schema.Property("location", schema.String("场景地点")),
-	)
 	return schema.Object(
 		schema.Property("chapter", schema.Int("章节号")).Required(),
 		schema.Property("title", schema.String("章节标题")).Required(),
 		schema.Property("goal", schema.String("本章目标")).Required(),
 		schema.Property("conflict", schema.String("核心冲突")).Required(),
-		schema.Property("scenes", schema.Array("场景列表", sceneSchema)).Required(),
 		schema.Property("hook", schema.String("章末钩子")).Required(),
 		schema.Property("emotion_arc", schema.String("情绪曲线")),
+		schema.Property("notes", schema.String("自由备忘（任何你觉得写作时需要记住的东西）")),
 	)
 }
 
@@ -51,17 +45,13 @@ func (t *PlanChapterTool) Execute(_ context.Context, args json.RawMessage) (json
 	if plan.Chapter <= 0 {
 		return nil, fmt.Errorf("chapter must be > 0")
 	}
-	if len(plan.Scenes) == 0 {
-		return nil, fmt.Errorf("scenes must not be empty")
-	}
 
 	if err := t.store.SaveChapterPlan(plan); err != nil {
 		return nil, fmt.Errorf("save chapter plan: %w", err)
 	}
 
 	return json.Marshal(map[string]any{
-		"planned":     true,
-		"chapter":     plan.Chapter,
-		"scene_count": len(plan.Scenes),
+		"planned": true,
+		"chapter": plan.Chapter,
 	})
 }