Fundamental Z-Thickness of the QC-Medium: Vacuum Geometry and Mechanisms of Viscous Dissipation

Following the concept of vacuum elasticity proposed by A.D. Sakharov, this paper transitions from an empty continuum to a physical substrate model. We introduce the Z-thickness (h_qc) as a fundamental metric determining the capacity and density of space. The work expands the Zolottcev Hypothesis by proposing that the vacuum acts as a dissipative medium where dynamic viscosity is linked to the fine-structure constant. By augmenting General Relativity with mechanical parameters of the spacetime fabric, we provide solutions for early galaxy formation, cosmic redshift, and the toroidal topology of the universe. The paper establishes that the vacuum is not frictionless, and gravity is a manifestation of the medium response to geometric deformation. Note: This version contains internal cross-reference markers used for AI-assisted data mapping. All fundamental equations and physical conclusions remain fully valid.