From 7b550d3b699a7d0627304eb0909d979ba94ed081 Mon Sep 17 00:00:00 2001
From: SpecialX <47072643+wangxiner55@users.noreply.github.com>
Date: Sat, 4 Jul 2026 11:14:46 +0800
Subject: [PATCH] =?UTF-8?q?feat(lesson-preparation):=20expanded-slice?=
 =?UTF-8?q?=EF=BC=88=E8=8A=82=E7=82=B9=E5=B1=95=E5=BC=80=E7=8A=B6=E6=80=81?=
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---
 .../hooks/expanded-slice.ts                   | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 src/modules/lesson-preparation/hooks/expanded-slice.ts

diff --git a/src/modules/lesson-preparation/hooks/expanded-slice.ts b/src/modules/lesson-preparation/hooks/expanded-slice.ts
new file mode 100644
index 0000000..f4e7e25
--- /dev/null
+++ b/src/modules/lesson-preparation/hooks/expanded-slice.ts
@@ -0,0 +1,56 @@
+import type { StateCreator } from "zustand";
+import type { EditorState } from "./use-lesson-plan-editor";
+
+export interface ExpandedSlice {
+  /** 已展开到正文流的节点 ID */
+  expandedNodeIds: string[];
+  /** v3 迁移过来的失效锚点提示（按 planId 记录是否已 dismiss） */
+  legacyAnchorDismissed: Record<string, boolean>;
+  toggleExpand: (nodeId: string) => void;
+  setExpanded: (nodeIds: string[]) => void;
+  isExpanded: (nodeId: string) => boolean;
+  dismissLegacyAnchor: (planId: string) => void;
+  /** 同步 doc.expandedNodeIds（保存/加载时调用） */
+  syncFromDoc: (expandedNodeIds: string[]) => void;
+}
+
+export const createExpandedSlice: StateCreator<
+  EditorState,
+  [],
+  [],
+  ExpandedSlice
+> = (set, get) => ({
+  expandedNodeIds: [],
+  legacyAnchorDismissed: {},
+
+  toggleExpand: (nodeId) => {
+    get().pushHistory();
+    set((s) => {
+      const isExp = s.expandedNodeIds.includes(nodeId);
+      const next = isExp
+        ? s.expandedNodeIds.filter((id) => id !== nodeId)
+        : [...s.expandedNodeIds, nodeId];
+      // 同步到 doc
+      return {
+        expandedNodeIds: next,
+        doc: { ...s.doc, expandedNodeIds: next },
+        isDirty: true,
+      };
+    });
+  },
+
+  setExpanded: (nodeIds) =>
+    set((s) => ({
+      expandedNodeIds: nodeIds,
+      doc: { ...s.doc, expandedNodeIds: nodeIds },
+    })),
+
+  isExpanded: (nodeId) => get().expandedNodeIds.includes(nodeId),
+
+  dismissLegacyAnchor: (planId) =>
+    set((s) => ({
+      legacyAnchorDismissed: { ...s.legacyAnchorDismissed, [planId]: true },
+    })),
+
+  syncFromDoc: (expandedNodeIds) => set({ expandedNodeIds }),
+});