fix(billing): avoid crash when billingPlanDetails is undefined in ContainerButton

[singhvishalkr]

Fixes #2975.

Symptom

On Appwrite 1.9.0 self-hosted, opening Project > Functions > Templates blanks the page with:

Uncaught TypeError: can't access property "group", n().billingPlanDetails is undefined

The same stack trace was previously reported against Auth Security and fixed by #2958; the underlying source still lives in src/lib/layout/containerButton.svelte, which is also used by the Functions Templates page and several other surfaces, so the bug resurfaces there.

Root cause

ContainerButton computes its default tooltipContent at component instantiation:

export let tooltipContent =
    $organization?.billingPlanDetails.group === BillingPlanGroup.Starter
        ? `Upgrade to add more ${title.toLocaleLowerCase()}`
        : `You've reached the ${title.toLocaleLowerCase()} limit for the ${
              $organization?.billingPlanDetails.name
          } plan`;

On self-hosted deployments, organization is populated but billingPlanDetails is undefined (there's no billing system). The optional chain stops at organization, but .billingPlanDetails.group / .billingPlanDetails.name are direct property reads, so the expression throws the moment any page containing a ContainerButton mounts.

Fix

Promote both property reads to optional chaining:

-    $organization?.billingPlanDetails.group === BillingPlanGroup.Starter
+    $organization?.billingPlanDetails?.group === BillingPlanGroup.Starter
...
-                  $organization?.billingPlanDetails.name
+                  $organization?.billingPlanDetails?.name

On cloud, behaviour is unchanged -- billingPlanDetails is always populated, both reads resolve normally. On self-hosted, group becomes undefined (falling through to the plan-limit branch with undefined in place of the plan name), but the tooltip is only shown when the wrapping disabled prop is true, which self-hosted never hits via this path, so the cosmetic fallback is acceptable and the crash is gone.

[greptile-apps]

Greptile Summary

Adds optional chaining to two billingPlanDetails property reads in ContainerButton, fixing an Uncaught TypeError that blanked pages (Functions Templates, Auth Security, etc.) on self-hosted deployments where billingPlanDetails is undefined. On cloud the behavior is unchanged; on self-hosted the tooltip falls back to showing undefined for the plan name, but the tooltip is only rendered when disabled is true, which self-hosted deployments never reach through this path.

Confidence Score: 5/5

Safe to merge — minimal, targeted fix with no behavior change on cloud and correct crash prevention on self-hosted.

Only two characters changed (two ?. additions), directly addressing a well-understood crash with no side effects on the primary cloud path. No P0/P1 findings remain.

No files require special attention.

Important Files Changed

Filename	Overview
src/lib/layout/containerButton.svelte	Adds optional chaining on billingPlanDetails?.group and billingPlanDetails?.name to prevent a crash when billingPlanDetails is undefined on self-hosted deployments.

_{Reviews (1): Last reviewed commit: "fix(billing): don't access billingPlanDe..." | Re-trigger Greptile}