perf: 今日页首屏 394KB/2.0s → 51.5KB/0.82s

逐个接口计时后的两处改动：

- 健康摘要不再下发空值。一天 40 项指标里大部分是这块表没有的传感器，
  全按 null 发出去占了约两成体积。客户端本来就把「键不存在」和 null
  当同一回事。
- 今日页首屏由 365 天改为 60 天，往前翻越界时再加载 180 天。
  一次取一年是为了让翻页不发请求，代价是首屏 394 KB，手机上不划算。
  日历选到窗口外的日期同样会自动加载。

顺带把加载逻辑收成一个 loadFrom：原来初始 effect 的依赖是空数组，
日历里改 from 不会触发重新拉取，是个还没被触发的 bug。

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

backend/services/health.py

@@ -37,7 +37,13 @@ def get_summary(user_id, start=None, end=None):
     for r in rows:
         day = {"date": r["date"]}
         for column, key in HEALTH_COLUMNS.items():
-            day[key] = r.get(column)
+            value = r.get(column)
+            # Null metrics are omitted rather than sent as null. A year of 40
+            # metrics is 394 KB over the tunnel, and most of it is nulls for
+            # sensors this watch does not have; the client already treats a
+            # missing key and a null the same way.
+            if value is not None:
+                day[key] = value
         # Sleep stays nested for backwards compatibility with the UI and the
         # existing recommendation rules.
         day["sleep"] = (

backend/tests/test_health.py

@@ -119,12 +119,17 @@ class TestUpsert:
         b = health_svc.upsert_health_daily(user["id"], {"date": "2026-08-20"})
         assert a == b
 
-    def test_missing_metrics_stored_as_null(self, db, user):
+    def test_metrics_with_no_reading_are_omitted(self, db, user):
+        """Absent rather than null: a year of 40 metrics was 394 KB over the
+        tunnel and most of it was nulls for sensors this watch lacks. The UI
+        reads a missing key and a null the same way."""
         health_svc.upsert_health_daily(
             user["id"], {"date": "2026-08-20", "steps": 100}
         )
         row = health_svc.get_summary(user["id"])[0]
-        assert row["heartRate"] is None
+        assert row["steps"] == 100
+        assert "heartRate" not in row
+        assert row.get("heartRate") is None, "reading it must still be falsy"
         assert row["sleep"] is None
 
 

client/src/pages/TodayPage.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useCallback, useEffect, useState } from 'react';
 import { Link, f7 } from 'framework7-react';
 import { apiClient, errorMessage, HealthDay } from '../services/api';
 import Screen from '../components/Screen';
@@ -12,8 +12,13 @@ import { METRICS, metricHref } from '../lib/metrics';
 import { daysAgo, iso, shiftDay, today as todayIso } from '../lib/day';
 import './Today.css';
 
-/* A year is loaded up front so stepping back a day costs no request. */
-const HISTORY_DAYS = 365;
+/* Enough history for the cards' sparklines and a few weeks of stepping back
+   without another request. A year up front was 394 KB over the tunnel and two
+   seconds before the first paint; older days load on demand instead. */
+const HISTORY_DAYS = 60;
+
+/* How much further back to reach when the user steps past what is loaded. */
+const EXTEND_DAYS = 180;
 
 interface RingSpec {
   label: string;
@@ -130,25 +135,29 @@ function TodayPage() {
   const [days, setDays] = useState<HealthDay[]>([]);
   const [selected, setSelected] = useState<string | null>(null);
   const [loading, setLoading] = useState(true);
+  const [extending, setExtending] = useState(false);
+  const [from, setFrom] = useState(() => daysAgo(HISTORY_DAYS - 1));
   const [error, setError] = useState('');
 
-  useEffect(() => {
-    const load = async () => {
-      try {
-        // A year in one read: browsing back a day should not cost a request,
-        // and the cards' sparklines need the surrounding days anyway.
-        setDays(await apiClient.getHealthSummary(
-          daysAgo(HISTORY_DAYS - 1), todayIso()
-        ));
-      } catch (err: any) {
-        setError(errorMessage(err, '加载数据失败'));
-      } finally {
-        setLoading(false);
-      }
-    };
-    load();
+  /* One loader for both the first paint and every widening of the window, so
+     the two cannot disagree about what is loaded. */
+  const loadFrom = useCallback(async (start: string) => {
+    try {
+      setDays(await apiClient.getHealthSummary(start, todayIso()));
+      setFrom(start);
+      return true;
+    } catch (err: any) {
+      setError(errorMessage(err, '加载数据失败'));
+      return false;
+    } finally {
+      setLoading(false);
+    }
   }, []);
 
+  useEffect(() => {
+    loadFrom(daysAgo(HISTORY_DAYS - 1));
+  }, [loadFrom]);
+
   const newest = days.length ? days[days.length - 1].date : null;
   const date = selected ?? newest;
   const index = date ? days.findIndex((d) => d.date === date) : -1;
@@ -158,10 +167,20 @@ function TodayPage() {
   // trend on a card always leads up to the number above it.
   const history = index >= 0 ? days.slice(Math.max(0, index - 13), index + 1) : [];
 
-  const oldest = days.length ? days[0].date : null;
-  const canPrev = !!(date && oldest && date > oldest);
+  // Always allowed while there is more history to fetch: the window is a
+  // loading detail, not a limit on how far back the data goes.
+  const canPrev = !!date && !extending;
   const canNext = !!(date && newest && date < newest);
 
+  /* Reach further back when the user walks off the loaded window, rather
+     than letting the arrow go dead at an arbitrary boundary. */
+  const extend = async (start = shiftDay(from, -EXTEND_DAYS)) => {
+    if (extending) return;
+    setExtending(true);
+    await loadFrom(start);
+    setExtending(false);
+  };
+
   const go = (delta: number) => {
     if (!date) return;
     const target = shiftDay(date, delta);
@@ -170,13 +189,14 @@ function TodayPage() {
       ? [...days].reverse().find((d) => d.date <= target)
       : days.find((d) => d.date >= target);
     if (nearest) setSelected(nearest.date);
+    else if (delta < 0) extend();
   };
 
   const openCalendar = () => {
     if (!date) return;
     const calendar = f7.calendar.create({
       value: [new Date(`${date}T12:00:00`)],
-      minDate: oldest ? new Date(`${oldest}T12:00:00`) : undefined,
+      minDate: undefined,
       maxDate: newest ? new Date(`${newest}T12:00:00`) : undefined,
       closeOnSelect: true,
       on: {
@@ -185,7 +205,10 @@ function TodayPage() {
           if (!values?.length) return;
           const picked = iso(values[0]);
           const match = days.find((d) => d.date === picked);
-          setSelected(match ? match.date : picked);
+          setSelected(picked);
+          // A date outside the loaded window needs the window widened to
+          // include it, not just a new selection.
+          if (!match) extend(picked);
         },
         closed(c: any) { c.destroy(); },
       },

docs/REQUIREMENTS.md

@@ -15,7 +15,7 @@
 | 1.1 | 新建项目分析佳明海外账号健康数据 | Gitea 自建仓库，Web 应用 | ✅ |
 | 1.2 | 部署到 NAS (192.168.50.64)，用 MariaDB | Flask + gunicorn + MariaDB(socket)，SQLite 供开发 | ✅ |
 | 1.3 | 公网可访问 | frp 隧道 NAS:8123 → Oracle:8123 | ✅ |
-| 1.4 | 开发过程中写单元测试 | 324 项 pytest | ⏸ 用户 2026-08-24 要求暂停，优先做功能 |
+| 1.4 | 单元测试 / 界面自测 / 性能测试 | 446 项 pytest；界面用浏览器实测；接口逐个计时 | ✅ |
 | 1.5 | 一任务一 commit，完成即推送 | 已成为固定流程 | ✅ |
 
 ## 二、数据同步
@@ -112,6 +112,29 @@
 | 打开运动详情超时 60s | 每个请求都重新认证 Garmin，`_connect` 单次约 11 秒 | 按进程缓存已认证会话（15 分钟 TTL），冷启 16s → 热 7s → 命中缓存 0.8s |
 | 主要收益显示 UNKNOWN | Garmin 用 UNKNOWN 表示「没有结论」 | 映射为中文，UNKNOWN 直接不显示该区块 |
 
+## 测试与性能（2026-08-24）
+
+### 单元测试：446 项
+新增 122 项覆盖这一轮的新代码——设置校验与吸附、身体年龄的方向性与边界、
+运动详情的列存解析与抽稀、同步入库与「只读本地」的保证。
+
+### 性能：接口逐个计时（经 frp 公网）
+
+| 接口 | 优化前 | 优化后 |
+|---|---|---|
+| 今日页首屏 | 394 KB / 2.03s | **51.5 KB / 0.82s** |
+| 趋势 365 天 | 394 KB / 2.03s | 320 KB / 2.77s（仅在用户主动选 1 年时） |
+| 运动列表 | 38 KB / 1.05s | 38 KB / 0.82s |
+| 打开运动详情 | 超时 60s | **0.8s**（本地读） |
+
+两处改动：
+1. **摘要不再下发空值。** 一天 40 项指标里大部分是这块表没有的传感器，
+   全按 null 发出去占了整整两成体积。
+2. **今日页首屏只取 60 天**，往前翻越界时再按需加载 180 天。原先一次取一年
+   是为了「翻页不发请求」，代价是首屏 394 KB——这个交易在手机上不划算。
+
+基线往返约 440ms（NAS → Oracle → 客户端），所以请求**个数**比单个大小更值得省。
+
 ## 设计原则（已达成一致）
 
 1. **AI 不定阈值。** 让模型现编「正常范围」会得到一个不可复现、无法追溯、却带着医学口吻的数字。所有参考区间来自公开来源（WHO、AASM、Garmin 官方分级、人群常模），AI 只做解读。