Update weekly pricing display

Changed PlansSection to show weekly prices (kr/vecka exkl. moms) instead of monthly, and replaced invoice payment option with card payment. Updated plan data to use priceWeekExclVat, removed Företagsfaktura in favor of Kortbetalning, and adjusted UI text to reflect weekly pricing.

X-Lovable-Edit-ID: edt-45350ab5-b3f8-4923-a752-3556ab401b51

src/components/PlansSection.tsx

@@ -4,33 +4,33 @@ const plans = [
   {
     name: "Lilla",
     kgPerWeek: "3 kg",
-    priceMonthExclVat: "5 400",
+    priceWeekExclVat: "1 350",
     features: [
       "3 kg kakor per vecka",
       "Veckoleverans",
-      "Företagsfaktura",
+      "Kortbetalning",
     ],
     featured: false,
   },
   {
     name: "Mellan",
     kgPerWeek: "5 kg",
-    priceMonthExclVat: "9 000",
+    priceWeekExclVat: "2 250",
     features: [
       "5 kg kakor per vecka",
       "Veckoleverans",
-      "Företagsfaktura",
+      "Kortbetalning",
     ],
     featured: true,
   },
   {
     name: "Stora",
     kgPerWeek: "10 kg",
-    priceMonthExclVat: "18 000",
+    priceWeekExclVat: "4 500",
     features: [
       "10 kg kakor per vecka",
       "Veckoleverans",
-      "Företagsfaktura",
+      "Kortbetalning",
     ],
     featured: false,
   },
@@ -87,9 +87,9 @@ const PlansSection = () => {
                 </div>
                 <div>
                   <span className="font-display text-3xl font-bold text-primary">
-                    {plan.priceMonthExclVat}
+                    {plan.priceWeekExclVat}
                   </span>
-                  <span className="text-muted-foreground ml-1">kr/mån exkl. moms</span>
+                  <span className="text-muted-foreground ml-1">kr/vecka exkl. moms</span>
                 </div>
               </div>