fix: address billing estimation review feedback

src/lib/components/billing/estimatedTotalBox.svelte

@@ -17,6 +17,7 @@
     export let isDowngrade = false;
     export let organizationId: string | undefined = undefined;
     export let estimationOverride: PlanChangeEstimate | null = null;
+    export let preferExternalEstimate = false;
 
     let budgetEnabled = false;
     let estimation: Models.Estimation | PlanChangeEstimate;
@@ -103,6 +104,8 @@
 
     $: if (estimationOverride) {
         estimation = estimationOverride;
+    } else if (preferExternalEstimate) {
+        estimation = undefined;
     } else if (organizationId) {
         getUpdatePlanEstimate(organizationId, billingPlan.$id, collaborators, couponData?.code);
     } else {

src/lib/components/organizationUsageLimits.svelte

@@ -64,7 +64,7 @@
                 ];
             }
 
-            return project.resources
+            return (project.resources ?? [])
                 .filter((resource) => resource.status !== 'compliant' || resource.excess > 0)
                 .map((resource) => ({
                     id: `${project.$id}-${resource.type}`,

src/routes/(console)/organization-[organization]/change-plan/+page.svelte

@@ -211,6 +211,10 @@
         }
     }
 
+    const additionalInviteEmails = $derived(getAdditionalInvites());
+    const additionalInviteSignature = $derived(additionalInviteEmails.join(','));
+    const selectedCouponCode = $derived(selectedCoupon?.code ?? null);
+
     async function handleSubmit() {
         if (isDowngrade) {
             await downgrade();
@@ -375,7 +379,12 @@
 
     $: isUpgrade = selectedPlan.order > $currentPlan?.order;
     $: isDowngrade = selectedPlan.order < $currentPlan?.order;
-    $: if (data?.organization?.$id && selectedPlan?.$id) {
+    $: if (
+        data?.organization?.$id &&
+        selectedPlan?.$id &&
+        additionalInviteSignature !== undefined &&
+        selectedCouponCode !== undefined
+    ) {
         loadPlanChangeEstimate();
     }
 
@@ -383,7 +392,7 @@
         if ($organization?.billingPlanId === selectedPlan.$id) return true;
         if (isDowngrade && selectedPlan.group === BillingPlanGroup.Starter && data.hasFreeOrgs)
             return true;
-        if (isDowngrade && selectedPlan.$id !== $organization?.billingPlanId) {
+        if (isDowngrade) {
             if (isLoadingPlanEstimate) return true;
 
             const limits = getPlanChangeLimits();
@@ -561,7 +570,8 @@
                 bind:couponData={selectedCoupon}
                 bind:billingBudget
                 organizationId={data.organization.$id}
-                estimationOverride={planChangeEstimate} />
+                estimationOverride={planChangeEstimate}
+                preferExternalEstimate />
         {:else if isSelfService}
             <PlanComparisonBox downgrade={data.hasFreeOrgs ? false : isDowngrade} />
         {/if}