Reframe routing as ONE topic on two axes (method x space); add unifying experiment: emergent GIUH, what space buys, no unique UH for nonlinear KW

Module 8a (channel network routing): cell-to-cell KW on Y network, topological sweep, wave profile + confluence, EF5 mechanics anchored

Module 7 (routing deep-dive): FIR/IIR/PDE schools, 5 editable versions, nonlinearity probe (5 vs 50mm pulses), EF5 KW Newton scheme, live NSE

Module 6 (response reservoirs): 4 editable versions, live NSE vs obs, log-scale baseflow view, pulse-response IUH panel

Restructure: multi-page interactive course (nav home + per-module pages with editable/runnable code, version tabs w/ CREST tag, live plots)