Add a puzzle-of-the-week community voting flow

[NickTheDevOpsGuy]

Summary

A community vote would make Phuzzle feel more alive and social, even for players who are not using co-op.

Scope

• Let players vote on a small set of candidate puzzles or themes for the next featured puzzle.
• Surface results and winning entry in a simple, fun way.
• Keep the flow lightweight so it does not overwhelm the home screen.

Acceptance Criteria

• Players can cast one vote during an active voting window.
• The UI clearly shows the candidate options and current state.
• The winning puzzle or theme is reflected in a later featured experience.
• The design works on mobile without becoming cramped.

Bucket

Big swing