- data_loader: add pt_bb_to_pdb() — generates backbone PDB from .pt tensor [L,4,3]
without RCSB network calls (works on HF Space offline)
- data_loader: add parse_gt_mode() — correct eigvects reshape [3N,K]->[:,k].reshape(N,3)
- Explorer: fix Pred vs GT tab (was using wrong column slicing ev[:,k*3:(k+1)*3])
- Explorer: generate PDB from .pt backbone when no local PDB file exists
- Explorer: fix gt_modes dict in Deep Analysis tab (correct reshape)
- Protein Detail: fix GT overlay on mode charts (parse_gt_mode)
- Protein Detail: show eigvals spectrum from .pt (render_eigenvalue_spectrum)
- Protein Detail: read seq from .pt directly, RCSB only as fallback
- Include all app component and page updates
