Interactions of Shape-Invariant Waves: Axis-Directional Displacement Transfer, Wave Packet Deformation, and Retroactive Constitution of Causality (v4: 3-bit Q-axis, chirality derived, delta-k_H sign derived)

v4 restores the 3-bit Q-axis structure (c₁=isospin, c₂c₃=color). Key improvements: (1) Chirality selection rule χ=sign((-1)c₁·k_t) derived without additional assumptions (§6.5), (2) δk_H sign derived from standing wave properties (κ=1, k_t=0, S³-filling baseline) rather than assumed (§8.2), (3) Lepton axis rearrangement with explicit Q values (e⁻:Q=4, ν:Q=0) (§6.7).