ui adjustment phyphox instruction adjustment

Add comprehensive step-by-step Phyphox recording guide

UI refinement

Vote on core windows only, skip first/last (recording start/stop transients)

Add session-break detection and clearer recording instructions

Fix gravity separation: use window mean instead of 0.3Hz LP (filter needs 167 samples to settle, window is only 128); recompute norm_params to match

Fix: use Acceleration (with g) for Phyphox recording, pipeline needs total acc including gravity

Fix norm_params: 561 index-keyed entries; update loader to match

Fix normalization: recompute norm_params from physical-unit UCI raw signals; add Phyphox reset button

Fix accelerometer unit conversion: divide Phyphox m/s² by 9.80665 to match UCI g units

UI adjustments..

wire up Phyphox pipeline: full 561 feature extraction from raw CSV