refactor(chat): centralize session persistence

src/routes/chatUiState.ts

@@ -22,6 +22,15 @@ export type ActiveRun = {
   subscribers: Set<StreamSubscriber>;
 };
 
+type ToolArtifactKind = "chart" | "map" | "panel" | "tool";
+
+type ToolCallPayload = {
+  session_id?: string;
+  tool?: string;
+  params?: unknown;
+  reason?: string;
+};
+
 export const isObjectRecord = (value: unknown): value is Record<string, unknown> =>
   typeof value === "object" && value !== null && !Array.isArray(value);
 
@@ -196,6 +205,59 @@ export const updateLastAssistantQuestion = (
     };
   });
 
+const getToolArtifactKind = (tool: string): ToolArtifactKind => {
+  if (tool === "show_chart" || tool === "chart") return "chart";
+  if (
+    tool === "locate_features" ||
+    tool === "zoom_to_map" ||
+    tool === "render_junctions" ||
+    tool === "apply_layer_style" ||
+    tool.startsWith("locate_")
+  ) {
+    return "map";
+  }
+  if (tool === "view_history" || tool === "view_scada") return "panel";
+  return "tool";
+};
+
+const getToolArtifactTitle = (tool: string, params: Record<string, unknown>) => {
+  if (typeof params.title === "string" && params.title.trim()) {
+    return params.title.trim();
+  }
+  if (tool === "show_chart" || tool === "chart") return "生成图表";
+  if (tool === "zoom_to_map") return "缩放到地图坐标";
+  if (tool === "render_junctions") return "渲染节点分区";
+  if (tool === "view_history") return "打开计算结果曲线";
+  if (tool === "view_scada") return "打开 SCADA 数据面板";
+  if (tool === "apply_layer_style") return "应用图层样式";
+  if (tool === "locate_features" || tool.startsWith("locate_")) return "地图定位";
+  return tool || "工具调用";
+};
+
+export const appendBackendToolArtifact = (
+  artifacts: unknown,
+  payload: ToolCallPayload,
+) => {
+  const tool = typeof payload.tool === "string" ? payload.tool.trim() : "";
+  if (!tool) {
+    return artifacts;
+  }
+  const params = isObjectRecord(payload.params) ? payload.params : {};
+  const next = Array.isArray(artifacts) ? [...artifacts] : [];
+  next.push({
+    id: `${tool}-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`,
+    tool,
+    kind: getToolArtifactKind(tool),
+    title: getToolArtifactTitle(tool, params),
+    description:
+      typeof payload.reason === "string" && payload.reason.trim()
+        ? payload.reason.trim()
+        : undefined,
+    params,
+  });
+  return next;
+};
+
 export const toFrontendPermission = (
   payload: PermissionRequestPayload,
   status: "pending" | "approved_once" | "approved_always" | "rejected" | "error" = "pending",