Add a guided onboarding track for first-time players

[NickTheDevOpsGuy]

Summary

The app has depth now. A new player should be able to discover core mechanics and fun features without bouncing.

Scope

• Create a first-session onboarding flow that teaches the basics.
• Highlight one or two standout Phuzzle features such as daily, packs, replay, or challenge sharing.
• Avoid blocking experienced players or repeat visitors.

Acceptance Criteria

• First-time players get a lightweight guided path into their first puzzle.
• The onboarding teaches drag, snap, tray usage, and one higher-level feature.
• Returning players can skip or never see redundant onboarding.
• The experience feels cozy and intentional, not corporate.

Bucket

Mid-size feature