Resonance sweeps, strain heatmaps, and yield-stress fracture

Upgraded BuckyBounce into a structural mechanics laboratory featuring 6 allotropes, harmonic resonance sweeps, and catastrophic bond fracture. Expanded the geometry engine beyond $C_{60}$ to generate $C_{70}$ fullerenes, $(5,5)$ armchair carbon nanotubes, graphene honeycomb sheets, geodesic domes, and 6-strut tensegrity icosahedrons with isolated compression bars suspended in continuous tension networks. Implemented a harmonic driving oscillator to sweep excitation frequencies ($\omega$) and reveal natural eigenmode vibrations in real time. Dynamic vertex shaders map Hooke's strain tensors into thermal heatmaps (cyan $\to$ yellow $\to$ red), triggering covalent bond snapping when local strain exceeds yield strength—complete with a laser-weld synthesis tool to reconstruct shattered lattices atom by atom.