Alert: on final review page if there are incomplete/missing information in activity form/s

#### Description:

An alert should be displayed in the final review page when a user fills out a form and there are blank required fields
This relates to the tasklist ticket: bcgov/cas-registration#4929

We want to give users a visual warning of any incomplete forms before they submit their report. Users will often fill out the reports and then send the final review page to verifiers for review. this alert would help flag any missing information before they do this.

#### Acceptance Criteria:

Given that I am an industry user on my final review page
If my activity forms have blank required fields or errors on fields
Then I will see a hyperlinked alert at the top

#### Development Checklist:

- [ ] Checklist item
- [ ] Checklist item
- [ ] Checklist item
- [ ] Meets the DOD

#### Definition of Ready (Note: If any of these points are not applicable, mark N/A)

- [ ] User story is included
- [ ] User role and type are identified
- [ ] Acceptance criteria are included
- [ ] Wireframes are included (if required)
- [ ] Design / Solution is accepted by Product Owner
- [ ] Dependencies are identified (technical, business, regulatory/policy)
- [ ] Story has been estimated (under 13 pts)

#### Definition of Done (Note: If any of these points are not applicable, mark N/A)

- [ ] Acceptance criteria are tested by the CI pipeline
- [ ] UI meets accessibility requirements
- [ ] Configuration changes are documented, documentation and designs are updated
- [ ] Passes code peer-review
- [ ] Passes QA of Acceptance Criteria with verification in Dev and Test
- [ ] Ticket is ready to be merged to main branch
- [ ] Can be demoed in Sprint Review
- [ ] Bugs or future work cards are identified and created
- [ ] Reviewed and approved by Product Owner

#### Blocked By/Blocking

#### Notes:

-

Start from the industry user's final review page and trace how activity forms report blank required fields or field errors. Confirm the existing tasklist ticket and supplied wireframe, then verify that incomplete forms produce a visible, hyperlinked alert at the top before submission.

Written by the indexing model from the issue text.