Integrate AI Credits widget into GoodWallet

[blueogin]

Summary

Add @goodwidget/ai-credits-widget to GoodWallet so authenticated users can open AI Credits from the home dashboard / More drawer. Host it through the GoodWidget integration boundary merged in #54 (typed registry, authenticated bottom-sheet route, restricted EIP-1193 provider).

AI Credits should remain widget-owned for configuration, buy/credits UI, transaction state, success, and errors. GoodWallet only supplies the host surface: package install, registry entry, route/dashboard wiring, provider policy, and tests.

Context

• Widget runtime is ready: Add secure GoodWidget integration boundary #54
• Package: @goodwidget/ai-credits-widget in GoodDollar/GoodWidget (packages/ai-credits-widget)
• Custom Element tag: ai-credits-widget
• Exports: ., ./element, ./register
• Related prep on the widget side: GoodWidget #132 / #133
• Parent foundation request: Feature Request: Prepare GoodWallet for GoodWidget Integration #52

Package status

The package is not published to npm yet. Integrate and verify against a local tarball:

# in GoodDollar/GoodWidget
pnpm --filter @goodwidget/ai-credits-widget pack

Create the plan

Create an execution plan in a new sub-issue and leave this feature request unchanged. Do not implement it until instructed.

• Title: [DRAFT][PLAN] Prepare GoodWallet for GoodWidget integration
• Type: Task
• Start the description with the sub-issue title.
• Link the sub-issue to this feature request.
• Start from the exact reference paths and the limited PR Setup support and ci/cd handling updating and integrating verified production released widgets #51 diff above.
• Separate reusable Wallet foundation work from a later widget-specific dependency, registry, route, icon, and test change.
• Include only required behavior, execution steps, acceptance criteria, and a human-reviewer checklist.
• Do not plan changes in the GoodWidget repository.