Build 25250436

🎯 Certification exams

✨ Tapping a cell now shows its number immediately from what's already revealed, instead of a blank pause
🐛 No more "disconnected" prompts when nothing actually dropped (and no instant re-connect that made no sense)
🐛 Action, Give up and Next buttons no longer flicker during chained reveals (chord)
⚠️ The early preview only uses information you can already see, so uncertain cells are still up to you
🎯 Difficulty

🎯 Small boards in the first three ranks are now guaranteed to be solvable with the promised reasoning, no more luck-based openings
⚡ Performance

⚡ Login and registration no longer block the main loop, so the server stops hitching during login spikes
🛠 The server now records the scene when it stutters (how long, and which part), so the next hitch is diagnosed from records instead of guesswork
🖥 Operations console (invisible to players, but it means faster fixes)

✨ New "Performance monitoring" page: live load for every region and the backend, charts for latency, stutters, CPU, connection pool and online players, plus perf alerts
✨ New "Logs" page: browse by level, category, source and keyword, with stutter-related entries grouped for quick triage
⚙️ Metrics refresh every 30 seconds, history kept up to 4 months (day view)
Happy mine sweeping 🎉