fix: add missing vi import and fix getByText exact match assertions

- analytics.test.ts: add vi to vitest import (was used at lines 24, 37, 66)
- BookingError.test.tsx: use regex matchers so phone/email assertions
  match partial text in combined <p> element

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/__tests__/analytics.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect } from "vitest";
+import { describe, it, expect, vi } from "vitest";
 import { ANALYTICS_EVENTS, fireAnalyticsEvent } from "../lib/analytics";
 
 describe("analytics", () => {