Thermally coupled tidal migration tracks for eccentric Neptune-like planets with final circular periods P_f = 3, 4, and 5 days. The integrations begin at e = 0.9 and T_c = 2000 K. Panels show the evolution of (a) eccentricity, (b) effective tidal quality factor, (c) tidal heating and cooling, (d) orbital period and instantaneous equilibrium spin period, (e) ω_effτ_M, and (f) effective core temperature. The tidal response uses k_f = 0.9, while k_e, k_f − k_e, and τm are recomputed from the instantaneous shear modulus and gravitational rigidity of the core. Open circles mark where the integrations are terminated at e = 0.1. At lower eccentricity, tidal heating approaches zero, and the core cools toward the elastic regime; continued integrations fully circularize. Dashed curves in panel (d) show P_spin = 2π/Ω_s, while solid curves show P_orb. The horizontal dashed line in panel (f) marks the adopted solidus temperature. The tracks rapidly approach a quasi-steady state in which tidal heating balances cooling, and then circularize after a few Gyr with only very weak dependence on P_f.