refactor: extract test user data and improve "New offers" test flow

- Extract test user data (seed phrases, DIDs, usernames) from importUser into separate getTestUserData function
- Refactor importUser to use getTestUserData internally, maintaining backward compatibility
- Update "New offers for another user" test to use new getTestUserData function
- Replace hardcoded seed phrase with programmatic retrieval using getTestUserData('00')
- Add proper TypeScript type annotations to array functions in testUtils
- Improve test maintainability by centralizing test user data management

This allows tests to access user data without executing import flow, providing more flexibility for test scenarios.

src/services/platforms/WebPlatformService.ts

@@ -693,6 +693,7 @@ export class WebPlatformService implements PlatformService {
     const setClause = keys.map((key) => `${key} = ?`).join(", ");
     const sql = `UPDATE settings SET ${setClause} WHERE accountDid = ?`;
     const params = [...keys.map((key) => settings[key]), did];
+    console.log("[WebPlatformService] updateDidSpecificSettings", sql, JSON.stringify(params, null, 2));
     await this.dbExec(sql, params);
   }