Fix thread-safety race in brain surface interpolation; bake DINOv2 into Docker image

Add precomputed cortical profile cache lookup

Remove pyvista renderer; use nilearn only for all brain renders

Add pyvista renderer, precomputed phi map cache, and background-thread steering brain renders

Move cortical profile render to background thread and cache KDTree IDW weights

Refactor: split panels into pure logic + UI layers

Remove darkness kwarg incompatible with newer nilearn

Sync brain.py: add missing _render_steering_b64, render_fmri_brain_compact_b64, get_dd_fmri, apply_steering_fmri

Move DynaDiff to Modal serverless endpoint; switch to CPU-only HF Space

Switch to modular explorer package (scripts/explorer/)