feat(FN-356): add checkout_started PostHog event to subscription checkout flow (+1 more)

Commits merged:
- chore(FN-356): verify checkout_started event is in place
- feat(FN-356): add checkout_started PostHog event to subscription checkout flow

Files changed:
apps/web/src/routes/dashboard/subscription/index.tsx | 4 ++++
 1 file changed, 4 insertions(+)

Fusion-Task-Id: FN-356

apps/web/src/routes/dashboard/subscription/index.tsx

@@ -431,6 +431,9 @@ export function SubscriptionPage() {
     capture("plan_selected", { plan: planKey });
     setSelectedPlanKey(planKey);
     setSelectedBrandIds([]);
+    if (planKey === "full") {
+      capture("checkout_started", { plan: planKey, period: billingPeriod });
+    }
     setStep(planKey === "full" ? "payment" : "brands");
   }
 
@@ -780,6 +783,7 @@ export function SubscriptionPage() {
           onAdvance={() => {
             if (step === "plan") {
               if (!selectedPlanKey) return;
+              capture("checkout_started", { plan: selectedPlanKey, period: billingPeriod });
               setStep(isFullPlan ? "payment" : "brands");
             } else if (step === "brands") {
               handleAdvanceFromBrands();