Add hierarchical summary frontier system

tests/summary-state.mjs

@@ -0,0 +1,102 @@
+import assert from "node:assert/strict";
+
+import {
+  addNode,
+  createEmptyGraph,
+  createNode,
+  deserializeGraph,
+  serializeGraph,
+} from "../graph/graph.js";
+import {
+  appendSummaryEntry,
+  getActiveSummaryEntries,
+  markSummaryEntriesFolded,
+} from "../graph/summary-state.js";
+import { buildGraphFromSnapshot, buildSnapshotFromGraph } from "../sync/bme-db.js";
+
+const emptyGraph = createEmptyGraph();
+assert.ok(emptyGraph.summaryState);
+assert.equal(emptyGraph.summaryState.enabled, true);
+assert.deepEqual(emptyGraph.summaryState.activeEntryIds, []);
+
+const legacyGraph = createEmptyGraph();
+addNode(
+  legacyGraph,
+  createNode({
+    type: "synopsis",
+    seq: 12,
+    fields: {
+      summary: "旧版概要节点：钟楼调查从线索确认推进到准备下探。",
+    },
+  }),
+);
+delete legacyGraph.summaryState;
+const reloadedLegacyGraph = deserializeGraph(serializeGraph(legacyGraph));
+assert.equal(getActiveSummaryEntries(reloadedLegacyGraph).length, 1);
+assert.equal(
+  getActiveSummaryEntries(reloadedLegacyGraph)[0].kind,
+  "legacy-import",
+);
+
+const clearedLegacyGraph = createEmptyGraph();
+addNode(
+  clearedLegacyGraph,
+  createNode({
+    type: "synopsis",
+    seq: 18,
+    fields: {
+      summary: "旧概要不应在显式空 summaryState 下自动复活。",
+    },
+  }),
+);
+clearedLegacyGraph.summaryState = {
+  version: 1,
+  enabled: true,
+  entries: [],
+  activeEntryIds: [],
+  lastSummarizedExtractionCount: 0,
+  lastSummarizedAssistantFloor: -1,
+};
+const clearedReloadedGraph = deserializeGraph(serializeGraph(clearedLegacyGraph));
+assert.equal(getActiveSummaryEntries(clearedReloadedGraph).length, 0);
+
+const graph = createEmptyGraph();
+const first = appendSummaryEntry(graph, {
+  level: 0,
+  kind: "small",
+  text: "第一条小总结",
+  extractionRange: [1, 3],
+  messageRange: [2, 7],
+});
+const second = appendSummaryEntry(graph, {
+  level: 0,
+  kind: "small",
+  text: "第二条小总结",
+  extractionRange: [4, 6],
+  messageRange: [8, 13],
+});
+assert.deepEqual(
+  getActiveSummaryEntries(graph).map((entry) => entry.id),
+  [first.id, second.id],
+);
+assert.equal(markSummaryEntriesFolded(graph, [first.id]), 1);
+assert.deepEqual(
+  getActiveSummaryEntries(graph).map((entry) => entry.id),
+  [second.id],
+);
+
+const snapshot = buildSnapshotFromGraph(graph, {
+  chatId: "summary-chat",
+  revision: 3,
+});
+const restoredGraph = buildGraphFromSnapshot(snapshot, {
+  chatId: "summary-chat",
+});
+assert.equal(getActiveSummaryEntries(restoredGraph).length, 1);
+assert.equal(getActiveSummaryEntries(restoredGraph)[0].text, "第二条小总结");
+assert.equal(
+  restoredGraph.summaryState.entries.some((entry) => entry.id === first.id && entry.status === "folded"),
+  true,
+);
+
+console.log("summary-state tests passed");