feat: add monthly and daily buy and sell pages

app.go

@@ -111,6 +111,10 @@ func (a *App) GetItemDetail(accountID uint, assetID string) (*inventory.ItemDeta
 	return a.svc.Inventory().GetItemDetail(accountID, assetID)
 }
 
+func (a *App) GetDailyBuys(accountID uint, page, pageSize int) (*inventory.DailyBuyPaginated, error) {
+	return a.svc.Inventory().ListDailyBuys(accountID, page, pageSize)
+}
+
 func (a *App) GetCompletedTrades(accountID uint, page, pageSize int, sortBy, sortDir string) (*trade.PaginatedGroups, error) {
 	return a.svc.Trade().ListCompletedTradeGroups(accountID, page, pageSize, sortBy, sortDir)
 }
@@ -132,6 +136,10 @@ func (a *App) GetUnmatchedSells(accountID uint) ([]model.TradeRecord, error) {
 	return a.svc.Trade().ListUnmatchedSells(accountID)
 }
 
+func (a *App) GetDailySells(accountID uint, year, month, page, pageSize int) (*trade.DailySellPaginated, error) {
+	return a.svc.Trade().ListDailySells(accountID, year, month, page, pageSize)
+}
+
 func (a *App) GetPnlSummary(accountID uint) (*pnl.PnlSummaryView, error) {
 	return a.svc.Pnl().GetSummary(accountID)
 }

frontend/src/hooks/useDailyBuys.ts

@@ -0,0 +1,24 @@
+import { useQuery } from '@tanstack/react-query';
+import { GetDailyBuys } from '../lib/wails';
+import { useAccounts } from './useAccounts';
+
+const STALE_TIME_MS = 2 * 60 * 1000;
+const DEFAULT_PAGE_SIZE = 30;
+
+export function useDailyBuys(
+  selectedAccountId: number | null,
+  page: number,
+  pageSize: number = DEFAULT_PAGE_SIZE,
+) {
+  const { data: accounts = [] } = useAccounts();
+
+  return useQuery({
+    queryKey: ['dailyBuys', selectedAccountId ?? 0, page, pageSize],
+    queryFn: () => {
+      const accountId = selectedAccountId ?? 0;
+      return GetDailyBuys(accountId, page, pageSize);
+    },
+    staleTime: STALE_TIME_MS,
+    enabled: selectedAccountId !== null || accounts.length > 0,
+  });
+}

frontend/src/hooks/useDailySells.ts

@@ -0,0 +1,26 @@
+import { useQuery } from '@tanstack/react-query';
+import { GetDailySells } from '../lib/wails';
+import { useAccounts } from './useAccounts';
+
+const STALE_TIME_MS = 2 * 60 * 1000;
+const DEFAULT_PAGE_SIZE = 30;
+
+export function useDailySells(
+  selectedAccountId: number | null,
+  year: number,
+  month: number,
+  page: number,
+  pageSize: number = DEFAULT_PAGE_SIZE,
+) {
+  const { data: accounts = [] } = useAccounts();
+
+  return useQuery({
+    queryKey: ['dailySells', selectedAccountId ?? 0, year, month, page, pageSize],
+    queryFn: () => {
+      const accountId = selectedAccountId ?? 0;
+      return GetDailySells(accountId, year, month, page, pageSize);
+    },
+    staleTime: STALE_TIME_MS,
+    enabled: selectedAccountId !== null || accounts.length > 0,
+  });
+}

frontend/src/hooks/useExpandableSet.ts

@@ -0,0 +1,25 @@
+import { useState, useCallback } from 'react';
+
+/**
+ * Shared hook for expand/collapse state using a Set of string keys.
+ * Used by collapsible day cards in daily sell/buy views.
+ */
+export function useExpandableSet() {
+  const [expanded, setExpanded] = useState<Set<string>>(new Set());
+
+  const toggle = useCallback((key: string) => {
+    setExpanded((prev) => {
+      const next = new Set(prev);
+      if (next.has(key)) {
+        next.delete(key);
+      } else {
+        next.add(key);
+      }
+      return next;
+    });
+  }, []);
+
+  const isExpanded = useCallback((key: string) => expanded.has(key), [expanded]);
+
+  return { expanded, isExpanded, toggle };
+}

frontend/src/lib/wails.ts

@@ -10,6 +10,8 @@ import {
   GetCompletedTrades,
   GetCompletedTradesSummary,
   GetUnmatchedSells,
+  GetDailySells,
+  GetDailyBuys,
   GetPnlSummary,
   GetMonthlyBreakdown,
   GetDashboardSummary,
@@ -34,6 +36,8 @@ export {
   GetCompletedTrades,
   GetCompletedTradesSummary,
   GetUnmatchedSells,
+  GetDailySells,
+  GetDailyBuys,
   GetPnlSummary,
   GetMonthlyBreakdown,
   GetDashboardSummary,