#417 chore(desktop): remove code quality section from AGENTS.md

Summary

• Remove generic code quality guidelines from desktop AGENTS.md
• These guidelines are redundant with the root AGENTS.md and don't provide desktop-specific value

Test plan

• No functional changes, documentation only

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Simplified AI agent guidelines documentation by streamlining code quality recommendations and retaining core state management preferences.

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