Synthesis of the Analysis of Galaxy Rotation Curves without Dark Matter

We analyze galaxy rotation curves using publicly available data from the SPARC database, the Milky Way, and M31 (Andromeda), applying a unified and reproducible methodology without invoking dark matter. The analysis identifies a universal dynamical regime in disk galaxies characterized by differential rotation, a well-defined shear layer, and a laminar outer region. From the outer laminar regime, a dimensionless scaling exponent βRTEG≈0.20 is consistently recovered across independent datasets, constituting an empirical validation milestone of the framework. The study is structured to clearly separate observational kinematics, dynamical regimes, continuum rheology, and physical interpretation. A rheological interpretation of gravity is proposed as a phenomenological extension and is explicitly distinguished from the empirically validated results. The work is released as a working paper intended to support independent verification and further investigation.