feat(dashboard): include historical sales in weekly chart

- loadWeeklyChart now fetches historical_sales for the last 7 days
- Sums normal daily sales + historical sales per day
- Bump dashboard.js to ?v=5

pos/static/js/dashboard.js

@@ -453,14 +453,25 @@ const Dashboard = (() => {
             days.push(daysAgo(i));
         }
 
-        const summaries = await Promise.all(
-            days.map(d => apiFetch(`/pos/api/register/daily-summary?date=${d}`))
-        );
+        const [summaries, histData] = await Promise.all([
+            Promise.all(days.map(d => apiFetch(`/pos/api/register/daily-summary?date=${d}`))),
+            apiFetch(`/pos/api/historical-sales?date_from=${days[0]}&date_to=${days[6]}&per_page=200`).catch(() => ({ data: [] }))
+        ]);
+
+        // Group historical sales by day
+        const histRows = histData.data || [];
+        const histByDay = {};
+        histRows.forEach(r => {
+            if (!r.sale_date) return;
+            histByDay[r.sale_date] = (histByDay[r.sale_date] || 0) + (r.total || 0);
+        });
 
         let weekTotal = 0;
         const dayData = days.map((dateStr, i) => {
             const s = summaries[i];
-            const total = s ? (s.total_sales || 0) : 0;
+            const normalTotal = s ? (s.total_sales || 0) : 0;
+            const histTotal = histByDay[dateStr] || 0;
+            const total = normalTotal + histTotal;
             weekTotal += total;
             const d = new Date(dateStr + 'T12:00:00');
             return {

pos/templates/dashboard.html

@@ -568,7 +568,7 @@
   <script src="/pos/static/js/pos-utils.js?v=2" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
   <script src="/pos/static/js/dashboard-stats.js?v=3" defer></script>
-  <script src="/pos/static/js/dashboard.js?v=4" defer></script>
+  <script src="/pos/static/js/dashboard.js?v=5" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>
   <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
   <script src="/pos/static/js/pwa-install.js" defer></script>