Frontend testing guide

[codebestia]

Write apps/web/docs/testing.md: the web app's Vitest setup, Testing Library conventions, and the browser APIs that must be faked — IndexedDB via fake-indexeddb, WebCrypto, service worker registration, and the socket client.

Acceptance criteria:

• Documents the runner config, setup files and how to run a single test
• Documents the fake-indexeddb pattern and the requirement to reset databases between tests so key material does not leak across cases
• Documents how WebCrypto-dependent code is tested, including round-trip encrypt/decrypt as the meaningful assertion
• Documents the socket-client mocking pattern for component tests

[alade-dev]

@alade-dev has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I would love to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @alade-dev to this issue.

[promisszn]

@promisszn has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I'd like to work on this issue. I'll write apps/web/docs/testing.md covering the Vitest setup, Testing Library conventions, and the browser API fakes (IndexedDB via fake-indexeddb, WebCrypto, service worker registration, socket client), documenting the runner config, the fake-indexeddb reset-between-tests requirement, the WebCrypto round-trip encrypt/decrypt test pattern, and the socket-client mocking pattern for component tests. I'll cross-check the doc against the actual test setup files before opening a PR.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @promisszn to this issue.