UI Enchantment - Improve Error Messaging and Flow for Wills Search via BC Services Card

**Background / Context**
We received internal feedback indicating a confusing user experience when a user logs in via BC Services Card to perform a Wills Search but lacks the necessary account permissions (no BC Online or BCROS account).

Currently, the user journey flows in a way that implies they should have access, but upon logging in, they hit a dead end with an unhelpful error message.

**Steps to Reproduce (Expected Flow to Investigate)**
Navigate to the Wills Search flow.
The screen asked the user to login using their BC Online account
An error shows up on BCROS with contact info with just an email address
Observe the flow transition and the resulting error screen.

**Proposed Actions**
- [ ] Review the User Flow: Audit the navigation flow to ensure users with BC Services Card login are redirected or properly warned before or during authentication.
- [ ] Review Error Messaging: Update the error screen to be informative and helpful:
- Clearly state that if a BC Online or BCROS account is required.
- Provide relevant help or contact info (including email and/or phone numbers if applicable).