README: scope-lock MTP as future iteration

Align HF card H1 + Companion Repos description to mobile-app 'E4B INT4 (Cactus)' ordering

Refresh Cactus card: Run 13 sideload-test baselines + APK / screenshot / diagnostic-suite cross-links

Upload Cactus INT4 multimodal artifact (343 INT4 + 2 INT8 + 1,732 FP16; CosSim 0.9946 / SNR 19.8 dB / MSE 5.18e-04)

Add hero header image (visual consistency across 9 SolarHive HF repos)

Add LICENSE

Add curated model card with Quantization Note + 11-row Companion Repos table

Pre-stage .gitattributes for LFS on *.weights and image binaries

initial commit