remove cyan queen candidate boxes - only confident green QUEEN box now

feat: test-time augmentation (4 views) + size filter (top 30% bbox area) for queen detection

feat: ranked top-3 queen candidates with probability shown - honest AI, user verifies

feat: 5 sample photos with verified queen detection + disclaimer about operating conditions

feat: binary classifier cascade - prefers dedicated queen classifier, falls back to VLM grid

fix: cascade no longer rubber-stamps YOLO queen labels - decides fresh from size only, ultra-strict parse

fix: cascade prompt emphasises color + size, more candidates, lower bee threshold

fix: cascade is too permissive - require exactly one queen, stricter prompt

feat: VLM cascade for queen verification (YOLO finds candidates, Qwen-VL confirms via grid comparison)