feat: revamp analysis premium experience

[SunilKumarKV]

Summary

• Revamps /analysis into a premium improvement-first experience
• Adds hero, empty state, PGN upload/paste CTAs, history and AI game CTAs
• Rebuilds workspace with board, move list, game summary, key findings, improvement priority, and recommended training
• Removes fake/deep engine claims
• Adds clear MVP trust boundary when engine analysis is unavailable
• Improves dark/light mode and mobile layout

Verification

• pnpm lint PASS
• pnpm test PASS
• pnpm build PASS
• Manual smoke PASS
• No console errors
• No fake analysis data shown

Known follow-ups

• Choose from history routes to /history instead of inline picker
• Guidance remains rule-based until real engine/game analysis exists

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Project	Deployment	Actions	Updated (UTC)
chessplay	Ready	Preview, Comment	Jun 2, 2026 11:13am