Add billing error handling and UI updates

- Introduced billing error patterns to match specific error messages and display appropriate user prompts in the ChatSidebar.
- Enhanced SidebarContentPanel and AccountSettings components to reflect subscription status, including trial expiration details.
- Updated button actions to direct users to the app URL for subscription management and upgrades.
- Added a new Payment section in AccountSettings for managing invoices and payment methods, with conditional rendering based on subscription status.

apps/x/packages/shared/src/ipc.ts

@@ -566,6 +566,7 @@ const ipcSchemas = {
       userId: z.string().nullable(),
       subscriptionPlan: z.string().nullable(),
       subscriptionStatus: z.string().nullable(),
+      trialExpiresAt: z.string().nullable(),
       sanctionedCredits: z.number(),
       availableCredits: z.number(),
     }),