Fix: Restore missing refs and add default history data

templates/index.html

@@ -184,13 +184,19 @@
         createApp({
             delimiters: ['${', '}'], // Avoid conflict with Jinja2
             setup() {
-                const day = ref(0);
-                const price = ref(50);
-                const competitorPrice = ref(48);
-                const totalRevenue = ref(0);
-                const currentSales = ref(0);
+                const history = ref([
+                    { day: 1, price: 50, sales: 98, revenue: 4900, competitorPrice: 48 },
+                    { day: 2, price: 50, sales: 102, revenue: 5100, competitorPrice: 49 },
+                    { day: 3, price: 52, sales: 95, revenue: 4940, competitorPrice: 50 },
+                    { day: 4, price: 52, sales: 93, revenue: 4836, competitorPrice: 49 },
+                    { day: 5, price: 49, sales: 110, revenue: 5390, competitorPrice: 47 }
+                ]);
+                const day = ref(5);
+                const price = ref(49);
+                const competitorPrice = ref(47);
+                const totalRevenue = ref(25166);
+                const currentSales = ref(110);
                 const autoRunning = ref(false);
-                const history = ref([]);
                 const aiAnalysis = ref(null);
                 const errorMsg = ref('');