Token Display, Layout & Download

**Description:**
Tokens are hard to find and confusing. They should be displayed clearly at the top of the page with labels and download options.

**Tasks:**
- [ ] Display tokens in a **grouped card layout** above the fold.
- [ ] Add clear labels and descriptions:
- Refresh Token → “⚠️ Most important token. Do not lose it.”
- Access Token → “Valid for 30 days. You can refresh anytime.”
- [ ] Add a **Download Tokens** button (saves to `.txt` file).
- [ ] Add onboarding pop-ups for each token explaining its purpose.

**Acceptance Criteria:**
- Tokens are easy to find in a clean layout.
- User can download tokens as a `.txt` file.
- First-time users see pop-ups explaining each token.