财务折线：概览卡画净资产趋势（配服务端 /timeline）laoyang/FamilyBook#24

用户原话（2026-10-28）：「鸿蒙端对齐网页端」。财务概览卡原来「折线图占位
（第二轮接图表能力后填）」，现在：

1) FbLedgerPoint 类型 + parseLedgerTimeline（读 /timeline 的 items）
2) loadEntries 里顺带拉 timeline（单独缓存键 ledger_timeline_<id>）
3) timelinePath()：时序点 → 绝对坐标折线 path（Path 组件画，Y 轴按
   min..max 归一，不是从 0 起 —— 金额平稳时不贴底）；<2 点时给占位文案。

编译 BUILD SUCCESSFUL；守卫 _fb_arkts_guard.js 1324/0；服务端冒烟
_i24_timeline_api.py 8/0 + 反证命中。

entry/src/main/ets/data/FbParse.ets

@@ -17,7 +17,7 @@
 import {
   FbAccount, FbAnniversaryItem, FbBookItem, FbBookNoteItem, FbCalEvent, FbHomeData, FbKinChip,
   FbMark,
-  FbLedgerBook, FbLedgerDetail, FbLedgerEntry, FbNoteItem, FbNoteBlock, FbNotificationItem, FbResourceItem,
+  FbLedgerBook, FbLedgerDetail, FbLedgerEntry, FbLedgerPoint, FbNoteItem, FbNoteBlock, FbNotificationItem, FbResourceItem,
   FbTaskItem, FbTripItem, FbWeather, FbStat, FbMemoryItem, FbRecentDay,
   FbTaskAttach, FbTaskComment, FbTaskDetail, FbTaskKid, FbTaskMeta, FbCatOpt, FbBoardOpt,
 } from '../model/Types';
@@ -230,6 +230,10 @@ interface RawLedgerSummary {
   asset?: number; debt?: number; net?: number; count?: number;
 }
 
+interface RawLedgerPoint {
+  date?: string; net?: number; asset?: number; debt?: number;
+}
+
 interface RawResource {
   id?: number; title?: string; content?: string; owner_id?: number;
   owner_name?: string | null; avatar?: string | null; avatar_color?: string | null;
@@ -515,6 +519,26 @@ export function parseLedgerEntries(json: string): FbLedgerDetail {
   return d;
 }
 
+/** 财务折线时序 → FbLedgerPoint[]（工单 #24；`GET /api/v1/ledger/<id>/timeline`） */
+export function parseLedgerTimeline(json: string): FbLedgerPoint[] {
+  const root: Record<string, Object> | null = asObject(json);
+  if (root === null) {
+    return [];
+  }
+  const rows: RawLedgerPoint[] = (root['items'] !== undefined && root['items'] !== null)
+    ? arr<RawLedgerPoint>(root['items'] as RawLedgerPoint[]) : [];
+  const out: FbLedgerPoint[] = [];
+  for (const r of rows) {
+    out.push({
+      date: s(r.date),
+      netCent: n(r.net),
+      assetCent: n(r.asset),
+      debtCent: n(r.debt),
+    });
+  }
+  return out;
+}
+
 /** id 数组的容错转换（服务端可能给 null） */
 function idList(v: number[] | null | undefined): number[] {
   const xs: number[] = arr<number>(v);