perf: 页面切换零延迟渲染、消除动态 chunk 加载白屏与二次 loading 闪烁、重构微滑淡入过渡

web-next/src/pages/expenses/ExpensesPage.tsx

@@ -10,6 +10,8 @@ import AccessibleInput from "../../components/AccessibleInput";
 import { dateText, money, monthNow } from "./date";
 import type { Expense, Notify } from "./types";
 
+let expensesCache: { key: string; items: Expense[]; summary: { count: number; amountCents: number } } | null = null;
+
 type Props = { timezone?: string; notify?: Notify; sessionKey?: string };
 const EXPORT_JOB_STORAGE_KEY = "tallynote.exportJobId";
 
@@ -30,9 +32,14 @@ export default function ExpensesPage({ timezone: timezoneProp = "Asia/Shanghai",
   const query = rawQuery.slice(0, 200);
   const rawMissingInvoice = searchParams.get("missingInvoice");
   const missingInvoice = searchParams.get("missingInvoice") === "true";
-  const [queryDraft, setQueryDraft] = useState(query);
-  const [items, setItems] = useState<Expense[]>([]); const [summary, setSummary] = useState({ count: 0, amountCents: 0 }); const [loading, setLoading] = useState(false); const [error, setError] = useState(""); const [loadedFilterKey, setLoadedFilterKey] = useState<string | null>(null); const [selectedKeys, setSelectedKeys] = useState<string[]>([]); const [drawer, setDrawer] = useState<"new" | "detail" | "edit" | null>(null); const [selected, setSelected] = useState<Expense | null>(null); const [includeManifest, setIncludeManifest] = useState(false); const [exporting, setExporting] = useState<string | null>(() => savedExportJob(exportStorageKey)); const [exportIssue, setExportIssue] = useState(""); const [trashTarget, setTrashTarget] = useState<Expense | null>(null); const [trashing, setTrashing] = useState(false); const sequence = useRef(0); const exportStarting = useRef(false);
   const filterKey = `${month}|${status}|${query}|${missingInvoice ? "1" : "0"}`;
+  const isCached = expensesCache?.key === filterKey;
+  const [queryDraft, setQueryDraft] = useState(query);
+  const [items, setItems] = useState<Expense[]>(() => (isCached ? expensesCache!.items : []));
+  const [summary, setSummary] = useState(() => (isCached ? expensesCache!.summary : { count: 0, amountCents: 0 }));
+  const [loading, setLoading] = useState(() => !isCached);
+  const [error, setError] = useState("");
+  const [loadedFilterKey, setLoadedFilterKey] = useState<string | null>(() => (isCached ? filterKey : null)); const [selectedKeys, setSelectedKeys] = useState<string[]>([]); const [drawer, setDrawer] = useState<"new" | "detail" | "edit" | null>(null); const [selected, setSelected] = useState<Expense | null>(null); const [includeManifest, setIncludeManifest] = useState(false); const [exporting, setExporting] = useState<string | null>(() => savedExportJob(exportStorageKey)); const [exportIssue, setExportIssue] = useState(""); const [trashTarget, setTrashTarget] = useState<Expense | null>(null); const [trashing, setTrashing] = useState(false); const sequence = useRef(0); const exportStarting = useRef(false);
   useEffect(() => {
     const params = new URLSearchParams(searchParams);
     let changed = false;
@@ -55,8 +62,8 @@ export default function ExpensesPage({ timezone: timezoneProp = "Asia/Shanghai",
     if (next.missingInvoice ?? missingInvoice) params.set("missingInvoice", "true"); else params.delete("missingInvoice");
     setSearchParams(params);
   };
-  const load = async () => { const s = ++sequence.current; const requestedKey = filterKey; setLoading(true); setError(""); try { const result = await api<{ items: Expense[]; summary: typeof summary }>(`/api/expenses?month=${month}&status=${status}&query=${encodeURIComponent(query)}&missingInvoice=${missingInvoice}`); if (s === sequence.current) { setItems(result.items); setSummary(result.summary); setLoadedFilterKey(requestedKey); setSelectedKeys(keys => keys.filter(k => result.items.some(x => x.id === k))); } } catch (e) { if (s === sequence.current) { setItems([]); setSummary({ count: 0, amountCents: 0 }); setLoadedFilterKey(null); setError((e as Error).message); } } finally { if (s === sequence.current) setLoading(false); } };
-  useEffect(() => { setSelectedKeys([]); setItems([]); setSummary({ count: 0, amountCents: 0 }); setLoadedFilterKey(null); void load(); }, [filterKey]);
+  const load = async () => { const s = ++sequence.current; const requestedKey = filterKey; setLoading(true); setError(""); try { const result = await api<{ items: Expense[]; summary: typeof summary }>(`/api/expenses?month=${month}&status=${status}&query=${encodeURIComponent(query)}&missingInvoice=${missingInvoice}`); if (s === sequence.current) { setItems(result.items); setSummary(result.summary); setLoadedFilterKey(requestedKey); setSelectedKeys(keys => keys.filter(k => result.items.some(x => x.id === k))); expensesCache = { key: requestedKey, items: result.items, summary: result.summary }; } } catch (e) { if (s === sequence.current) { setItems([]); setSummary({ count: 0, amountCents: 0 }); setLoadedFilterKey(null); setError((e as Error).message); } } finally { if (s === sequence.current) setLoading(false); } };
+  useEffect(() => { setSelectedKeys([]); if (expensesCache?.key !== filterKey) { setItems([]); setSummary({ count: 0, amountCents: 0 }); setLoadedFilterKey(null); } void load(); }, [filterKey]);
   const selectedTotal = useMemo(() => items.filter(i => selectedKeys.includes(i.id)).reduce((sum, i) => sum + i.amountCents, 0), [items, selectedKeys]);
   const shiftMonth = (delta: number) => { const [rawYear, rawMonthNumber] = month.split("-").map(Number); const y = rawYear || new Date().getFullYear(); const m = rawMonthNumber || 1; const d = new Date(y, m - 1 + delta, 1); updateFilters({ month: `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}` }); };
   const rememberExportJob = (jobId: string | null) => {
@@ -125,7 +132,7 @@ export default function ExpensesPage({ timezone: timezoneProp = "Asia/Shanghai",
     <div className="tn-summary expenses-summary"><span>{summary.count} 笔</span><strong>{money(summary.amountCents)}</strong>{selectedKeys.length > 0 && <><span>已选 {selectedKeys.length} 笔，共 {money(selectedTotal)}</span><Button variant="text" onClick={() => setSelectedKeys([])}>清除选择</Button></>}</div>
     {exportIssue && <div className="tn-export-status" role="status"><RefreshCw size={15} className="spin" /><span>{exportIssue}</span><Button variant="text" onClick={() => { setExportIssue(""); rememberExportJob(null); }}>关闭提示</Button></div>}
     {error && <div className="expense-error" role="alert"><AlertCircle size={16} />{error}<Button variant="text" onClick={() => void load()}>重试</Button></div>}
-    {error ? null : !dataReady || (loading && !items.length) ? <div className="tn-empty" role="status" aria-live="polite"><BeamLoading text="正在加载账目列表…" /></div> : !items.length ? emptyState : <div className="tn-table-wrap" role="region" aria-label="账目列表，可横向滚动查看更多列"><Table rowKey="id" data={items} columns={columns as any} selectedRowKeys={selectedKeys} onSelectChange={(keys: any[]) => setSelectedKeys(keys as string[])} hover stripe /></div>}
+    {error ? null : (!items.length && (loading || !dataReady)) ? <div className="tn-empty" role="status" aria-live="polite"><BeamLoading text="正在加载账目列表…" /></div> : !items.length ? emptyState : <div className="tn-table-wrap" role="region" aria-label="账目列表，可横向滚动查看更多列"><Table rowKey="id" data={items} columns={columns as any} selectedRowKeys={selectedKeys} onSelectChange={(keys: any[]) => setSelectedKeys(keys as string[])} hover stripe /></div>}
     {drawer === "new" && <ExpenseDrawer timezone={timezone} onClose={() => setDrawer(null)} onSaved={load} notify={notify} />}{drawer === "edit" && selected && <ExpenseDrawer timezone={timezone} expense={selected} onClose={() => setDrawer(null)} onSaved={load} notify={notify} />}{drawer === "detail" && selected && <ExpenseDetail timezone={timezone} expense={selected} onClose={() => setDrawer(null)} onUpdated={load} onRequestEdit={e => { setSelected(e); setDrawer("edit"); }} notify={notify} />}
     {trashTarget && <Dialog width="540px" visible header="移入回收站？" confirmBtn={{ content: "移入回收站", theme: "danger", loading: trashing, disabled: trashing }} cancelBtn="取消" onClose={() => { if (!trashing) setTrashTarget(null); }} onConfirm={() => void moveToTrash()} onCancel={() => { if (!trashing) setTrashTarget(null); }}>确认将“{trashTarget.note || `${dateText(trashTarget.paidAt, timezone)}的账目`}”移入回收站？移入后将不在正常列表中展示，关联附件将完整保留，可随时恢复。</Dialog>}
   </div>;