test(e2e): fix flaky/ambiguous locators and wallet-gated create-form tests

[Genghis-codes]

Summary

Fixes 4 E2E test issues in the Playwright suite:

• E2E: make analytics.spec.ts independent of the current date #908 — analytics.spec.ts's mock-data-based assertions depended on
  which calendar day the suite ran, since the seeded streams in
  lib/mock-data.ts use offsets relative to Date.now(). Froze the clock
  with Playwright's page.clock.install() in the shared withWallet
  helper so the 30-day/all-time counts are deterministic.
• E2E: fix strict-mode locators in visual.spec.ts form and cancel-dialog tests #907 — visual.spec.ts's "filled form screenshot" and "cancel dialog
  screenshot" tests used text= locators that matched more than one
  element (the submit button text also appears as the breadcrumb label;
  the cancel trigger button and the dialog title share the same copy).
  Replaced with getByRole('heading'/'button', { name }).
• E2E: replace ambiguous text=Dashboard locators with role-based ones #905 — locator('text=Dashboard') matched the navbar link, the
  mobile nav link, and (on the dashboard page) the page's own <h1>, or
  (on the stream detail page) both the navbar link and the page's own
  back-to-dashboard link. Replaced with a role-based heading locator for
  the dashboard page and a main-landmark-scoped link locator for the
  stream detail page's back button.
• E2E: create-form tests in contract-integration.spec.ts need a connected wallet #903 — The create-form tests in contract-integration.spec.ts
  (should show create form with recipient field, should handle token selection, should have accessible form labels) visited /app/create
  without a connected wallet. Since the form is wrapped in
  RequireWallet, they only ever saw the connect prompt. Added the same
  withWallet mock-xBull helper accessibility.spec.ts already uses, and
  call it before navigating in these three tests.

Test plan

• CI Playwright run on chromium-desktop

Closes #908
Closes #907
Closes #905
Closes #903

🤖 Generated with Claude Code

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