Clean dataset: remove marine_zooplankton (ZooScanNet CC-BY-NC), update to 5 CC-BY sources, 93,014 triples, 123 genera, 8 categories

feat: 3-model side-by-side (vanilla / v2 / v3) + shape selector + 3 input modes

catalog without cyano (30 samples, 6 per category × 5 categories)

v3.0: 36 samples (6 per category, same-microscope source) + clickable gallery polish

v2: side-by-side comparison Gemma 4 factory vs MicroLens v2 fine-tune