billing hotfix (#1670)

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## Description

Please provide a clear description of your changes.

---

## Type of Change

Please delete options that are not relevant.

- [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
- [ ] ✨ New feature (non-breaking change which adds functionality)
- [ ] 💥 Breaking change (fix or feature with breaking changes)
- [ ] 📝 Documentation update
- [ ] 🎨 UI/UX improvement
- [ ] 🔒 Security enhancement
- [ ] ⚡ Performance improvement

## Areas Affected

Please check all that apply:

- [ ] Email Integration (Gmail, IMAP, etc.)
- [ ] User Interface/Experience
- [ ] Authentication/Authorization
- [ ] Data Storage/Management
- [ ] API Endpoints
- [ ] Documentation
- [ ] Testing Infrastructure
- [ ] Development Workflow
- [ ] Deployment/Infrastructure

## Testing Done

Describe the tests you've done:

- [ ] Unit tests added/updated
- [ ] Integration tests added/updated
- [ ] Manual testing performed
- [ ] Cross-browser testing (if UI changes)
- [ ] Mobile responsiveness verified (if UI changes)

## Security Considerations

For changes involving data or authentication:

- [ ] No sensitive data is exposed
- [ ] Authentication checks are in place
- [ ] Input validation is implemented
- [ ] Rate limiting is considered (if applicable)

## Checklist

- [ ] I have read the [CONTRIBUTING](https://github.com/Mail-0/Zero/blob/staging/.github/CONTRIBUTING.md) document
- [ ] My code follows the project's style guidelines
- [ ] I have performed a self-review of my code
- [ ] I have commented my code, particularly in complex areas
- [ ] I have updated the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix/feature works
- [ ] All tests pass locally
- [ ] Any dependent changes are merged and published

## Additional Notes

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## Screenshots/Recordings

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---

_By submitting this pull request, I confirm that my contribution is made under the terms of the project's license._


<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Bug Fixes**
  * Improved error handling in billing to automatically sign out users if a billing error occurs.

* **Chores**
  * Updated internal cache key version for improved data management.
  * Enhanced user deletion process to ensure user data is fully removed from all relevant systems.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/mail/hooks/use-billing.ts

@@ -1,5 +1,6 @@
 import { useAutumn, useCustomer } from 'autumn-js/react';
-import { useMemo } from 'react';
+import { signOut } from '@/lib/auth-client';
+import { useEffect, useMemo } from 'react';
 
 type FeatureState = {
   total: number;
@@ -60,18 +61,22 @@ const FEATURE_IDS = {
 const PRO_PLANS = ['pro-example', 'pro_annual', 'team', 'enterprise'] as const;
 
 export const useBilling = () => {
-  const { customer, refetch, isLoading } = useCustomer();
+  const { customer, refetch, isLoading, error } = useCustomer();
   const { attach, track, openBillingPortal } = useAutumn();
 
-  const isPro = useMemo(() => {
-    if (!customer?.products || !Array.isArray(customer.products)) return false;
-    return customer.products.some((product) =>
-      PRO_PLANS.some((plan) => product.id?.includes(plan) || product.name?.includes(plan)),
-    );
-  }, [customer]);
+  useEffect(() => {
+    if (error) signOut();
+  }, [error]);
 
-  const customerFeatures = useMemo(() => {
-    if (!customer?.features) return DEFAULT_FEATURES;
+  const { isPro, ...customerFeatures } = useMemo(() => {
+    const isPro =
+      customer?.products && Array.isArray(customer.products)
+        ? customer.products.some((product) =>
+            PRO_PLANS.some((plan) => product.id?.includes(plan) || product.name?.includes(plan)),
+          )
+        : false;
+
+    if (!customer?.features) return { isPro, ...DEFAULT_FEATURES };
 
     const features = { ...DEFAULT_FEATURES };
 
@@ -117,7 +122,7 @@ export const useBilling = () => {
       };
     }
 
-    return features;
+    return { isPro, ...features };
   }, [customer]);
 
   return {

apps/mail/lib/constants.tsx

@@ -10,7 +10,7 @@ export const SIDEBAR_WIDTH_ICON = '3rem';
 export const SIDEBAR_KEYBOARD_SHORTCUT = 'b';
 export const BASE_URL = import.meta.env.VITE_PUBLIC_APP_URL;
 export const MAX_URL_LENGTH = 2000;
-export const CACHE_BURST_KEY = 'cache-burst:v0.0.3';
+export const CACHE_BURST_KEY = 'cache-burst:v0.0.4';
 
 export const emailProviders = [
   {

apps/server/src/lib/auth.ts

@@ -16,9 +16,9 @@ import { getContext } from 'hono/context-storage';
 import { defaultUserSettings } from './schemas';
 import { getMigrations } from 'better-auth/db';
 import { disableBrainFunction } from './brain';
+import { type EProviders } from '../types';
 import { APIError } from 'better-auth/api';
 import { getZeroDB } from './server-utils';
-import type { EProviders } from '../types';
 import type { HonoContext } from '../ctx';
 import { env } from 'cloudflare:workers';
 import { createDriver } from './driver';
@@ -117,6 +117,13 @@ export const createAuth = () => {
           if (!request) throw new APIError('BAD_REQUEST', { message: 'Request object is missing' });
           const db = getZeroDB(user.id);
           const connections = await db.findManyConnections();
+          const context = getContext<HonoContext>();
+          try {
+            await context.var.autumn.customers.delete(user.id);
+          } catch (error) {
+            console.error('Failed to delete Autumn customer:', error);
+            // Continue with deletion process despite Autumn failure
+          }
 
           const revokedAccounts = (
             await Promise.allSettled(