KEYBOARD
Space pause / resume rotation
Q E tilt helix left / right
← → prev / next node
P play auto-advance (speed cycles fwd & rev)
T top view (newest post)
B bottom view (oldest post)
R reset camera
F fold / unfold (protein view)
H toggle helix tube
G interaction graph
L lock camera
[ ] adjust coil spread
S reset spread
/ focus search
Esc close panel / clear filter