feat: enhance transactions page with total amount and count display; integrate collapsible statistics card and update chart data handling

app/transactions/page.tsx

@@ -2,7 +2,14 @@
 
 import { useCallback, useState } from "react";
 import { PageLayout, PageHeader } from "@/components/layout";
-import { RefreshCw, Maximize2, Minimize2 } from "lucide-react";
+import {
+  RefreshCw,
+  Maximize2,
+  Minimize2,
+  Receipt,
+  Euro,
+  ChevronDown,
+} from "lucide-react";
 import {
   TransactionFilters,
   TransactionBulkActions,
@@ -16,6 +23,12 @@ import { OFXImportDialog } from "@/components/import/ofx-import-dialog";
 import { MonthlyChart } from "@/components/statistics";
 import { useQueryClient } from "@tanstack/react-query";
 import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import {
+  Collapsible,
+  CollapsibleContent,
+  CollapsibleTrigger,
+} from "@/components/ui/collapsible";
 import { Upload } from "lucide-react";
 import {
   Dialog,
@@ -98,7 +111,12 @@ export default function TransactionsPage() {
   });
 
   // Chart data
-  const { monthlyData, isLoading: isLoadingChart } = useTransactionsChartData({
+  const {
+    monthlyData,
+    isLoading: isLoadingChart,
+    totalAmount: chartTotalAmount,
+    totalCount: chartTotalCount,
+  } = useTransactionsChartData({
     selectedAccounts,
     selectedCategories,
     period,
@@ -138,6 +156,10 @@ export default function TransactionsPage() {
       ? Math.round((uncategorizedCount / totalTransactions) * 100)
       : 0;
 
+  // Use total from chart data (all filtered transactions) or fallback to paginated data
+  const totalAmount = chartTotalAmount ?? 0;
+  const displayTotalCount = chartTotalCount ?? totalTransactions;
+
   // For filter comboboxes, we'll use empty arrays for now
   // They can be enhanced later with separate queries if needed
   const transactionsForAccountFilter: never[] = [];
@@ -199,19 +221,80 @@ export default function TransactionsPage() {
         transactionsForCategoryFilter={transactionsForCategoryFilter}
       />
 
-      {!isLoadingChart && monthlyData.length > 0 && (
-        <div className="mb-6">
-          <MonthlyChart
-            data={monthlyData}
-            formatCurrency={formatCurrency}
-            collapsible
-            defaultExpanded={true}
-            showDots={
-              period !== "all" &&
-              (period === "12months" || monthlyData.length <= 12)
-            }
-          />
-        </div>
+      {(!isLoadingChart || !isLoadingTransactions) && (
+        <Card className="mb-6">
+          <Collapsible defaultOpen={true}>
+            <CardHeader className="flex flex-row items-center justify-between space-y-0 py-3 px-6">
+              <CardTitle className="text-base font-semibold">
+                Statistiques
+              </CardTitle>
+              <CollapsibleTrigger asChild>
+                <Button variant="ghost" size="sm" className="h-8">
+                  <ChevronDown className="w-4 h-4 mr-1" />
+                  Réduire
+                </Button>
+              </CollapsibleTrigger>
+            </CardHeader>
+            <CollapsibleContent>
+              <CardContent className="pt-0">
+                {/* Summary cards */}
+                {!isLoadingTransactions && (
+                  <div className="grid gap-4 grid-cols-2 mb-6">
+                    <Card>
+                      <CardContent className="pt-6">
+                        <div className="flex items-center justify-between">
+                          <div>
+                            <p className="text-sm font-medium text-muted-foreground">
+                              Nombre de transactions
+                            </p>
+                            <p className="text-2xl font-bold mt-1">
+                              {displayTotalCount}
+                            </p>
+                          </div>
+                          <Receipt className="w-8 h-8 text-muted-foreground" />
+                        </div>
+                      </CardContent>
+                    </Card>
+                    <Card>
+                      <CardContent className="pt-6">
+                        <div className="flex items-center justify-between">
+                          <div>
+                            <p className="text-sm font-medium text-muted-foreground">
+                              Total
+                            </p>
+                            <p
+                              className={`text-2xl font-bold mt-1 ${
+                                totalAmount >= 0
+                                  ? "text-emerald-600"
+                                  : "text-red-600"
+                              }`}
+                            >
+                              {formatCurrency(totalAmount)}
+                            </p>
+                          </div>
+                          <Euro className="w-8 h-8 text-muted-foreground" />
+                        </div>
+                      </CardContent>
+                    </Card>
+                  </div>
+                )}
+
+                {/* Chart */}
+                {!isLoadingChart && monthlyData.length > 0 && (
+                  <MonthlyChart
+                    data={monthlyData}
+                    formatCurrency={formatCurrency}
+                    collapsible={false}
+                    showDots={
+                      period !== "all" &&
+                      (period === "12months" || monthlyData.length <= 12)
+                    }
+                  />
+                )}
+              </CardContent>
+            </CollapsibleContent>
+          </Collapsible>
+        </Card>
       )}
 
       <TransactionBulkActions