🔧 Migrate and Refactor `PageFooter` Component to Vue 3

[tholulomo]

📋 Description

This subtask is part of the Nanomine Pages and Components Migration to Vue 3 Epic. The objective is to refactor and migrate the PageFooter component from its legacy implementation to align with Vue 3 development standards.

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✅ Tasks

1. Component Migration

• Refactor the existing PageFooter from a class-based component to a Vue 3 Composition API structure.
• Convert the original JavaScript implementation to TypeScript for improved type safety and consistency.

2. Style Refactoring

• Migrate and adapt any footer-specific SCSS styles.
• Ensure styles are scoped appropriately and follow the modular styling conventions used in the Vue 3 setup.

3. Static Content Integration

• Integrate Privacy Statement and Terms of Use text by reusing content from:
  🔗 Duke

4. Unit Testing

• Write or update unit tests for the refactored PageFooter component.
• Ensure test coverage includes rendering, props (if any), and link verification.

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🧪 Acceptance Criteria

• PageFooter is migrated to Vue 3 with Composition API and written in TypeScript.
• Styles are modular and scoped.
• Static content (Privacy Statement and Terms of Use) is correctly integrated.
• Unit tests are implemented and passing.
• No functional regressions or UI inconsistencies.

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🔀 Branch

Commit your work to a branch named:
feature/vue3-page-footer-migration

🔗 Related Epic

This task is a subtask of: 📦 Nanomine Pages and Components Migration to Vue 3