Code review completed for Display Entities implementation

[Copilot]

Performed comprehensive code review of the Display Entities PR at @CoasterFreakDE's request.

Review Scope

• Core Display Managers: BlockDisplayManager, ItemDisplayManager, TextDisplayManager (1,600+ LOC)
• Supporting Infrastructure: 135 files across event handling, inventory system, party management, visual effects
• Test Coverage: Verified test implementation for display entities and supporting features

Key Findings

Architecture Strengths

• Thread-safe entity management with ConcurrentHashMap/AtomicInteger
• Clean viewer lifecycle with add/remove operations
• Proper error handling prevents plugin crashes

Critical Issues

1. Internationalization: German error message in TextDisplayFlags.kt:56
2. Null Safety: Missing validation for location.world
3. Entity ID Conflicts: Static ranges (1M, 2M, 3M) risk collisions with other plugins
4. Memory Management: Unbounded activeDisplays map lacks cleanup for disconnected players
5. API Design: Complex constructors need builders; missing input validation

Recommendations

• Implement UUID-based entity IDs or plugin-specific registry
• Add auto-cleanup for offline viewers to prevent memory leaks
• Validate numeric parameters (scale, opacity ranges)
• Consider builder pattern for display creation

No code changes made—review feedback provided to PR author for action.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[diffy-bot]

Git Diff Summary

No diff content was provided — there is nothing to summarize.

How to provide a diff:

• Paste the output of git diff (or git diff --staged) into the message.
• Or attach a patch file (unified diff / .patch).
• Optionally include the commit range (e.g., git diff HEAD~1..HEAD) or PR link.

You can generate a new summary by commenting @diffy-bot