Add Breakout and Minesweeper to the campus arcade

[Anuraj-dev]

Problem

The campus arcade only had a few games, and on phone-width screens the game headers overflowed. 38 frontend tests also failed on Node 26, which no longer provides a usable global localStorage for them.

What changes

• Breakout cabinet at tile (68,96):
  • Paddle, bricks, and lives.
  • The ball serves on a key press only.
  • On mobile, a tall portrait court with a HUD text size of at least 12px.
• Minesweeper cabinet at tile (85,96):
  • Mines are placed after the first click, so the first click is always safe.
  • A flagged cell can't be revealed.
• Both games have pure reducers in frontend/src/game/arcade/, UI in frontend/src/ui/arcade/, and entries in ARCADE_GAMES so scores reach the leaderboard.
• The arcade overlay ignores key auto-repeat. Every game header now wraps on narrow screens.
• A localStorage shim in frontend/src/vitest.setup.ts makes tests pass on Node 26.

Verification

• lint, typecheck, build: exit 0.
• size: 84.2 KB gzip, within the 130 KB budget.
• Tests: 156, 264, and 1294 passing.
• Checked with Playwright screenshots at desktop and mobile widths.

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Project	Deployment	Actions	Updated
2d-metaverse	Ready	Preview	Sep 30, 2026 5:21am UTC