The Chronogeometry of the Aether Unit: Orthogonal Temporal Dimensions, $16\pi^2$ State Space, and Ledger-One Deformation Closure

This paper develops a QMU-first chronogeometry of the primitive Aether unit and then extends that construction into an explicit matter-coupled deformation system. The primitive unit is constructed from two complementary electrostatic-charge-sector carriers and two orthogonal temporal dimensions. The temporal phase embedding yields an exact period lattice, a balanced induced metric, and a one-state QMU area closure of $A_A={\lambda_C}^2$. Four orientation states form a $\mathbb Z_2\times\mathbb Z_2$ state space with unsigned angular measure $16\pi^2$. Their formal chronogeometric area capacity is $4{\lambda_C}^2$, but only one state can be occupied and physically expressed by a Ligamen Circulatus at an exposed quantum moment. The spatial construction derives tangent unit-radius carrier spheres, finite pole-to-pole magnetic loxodromic channels, exact elliptic arc length, curvature, torsion, normal and geodesic curvature, a Bishop-frame tube, and an exact quadratic registration of the time-axis projection to cardioid geometry. The visible branch closes through an unsigned $2\pi$ phase during one exposed quantum moment. A provisional hidden return contributes the complementary $2\pi$ phase without introducing a second positive interval of observable time. The resulting prediction for successive exposed states is $t_q=1/F_q=\lambda_C/c$. In the matter-coupled continuation, the Ligamen Circulatus scans one occupied loxodromic channel during one quantum moment. Because its internal scan phase is not independently resolved in the four-dimensional projection, the exposed particle is represented by the completed scan rather than by localization at one point of the trajectory. Conservation of the scan area gives $\operatorname{angm}=m_e{\lambda_C}^2F_q=h$ and $\operatorname{mflx}=h/{e_{emax}}^2$. The SI bridge satisfies $\Phi_0/\operatorname{ccf}=\operatorname{mflx}/2$, while the possible association of the one-half factor with half-spin remains a structural registration rather than an independent spin derivation. Ledger One supplies the constitutive reason that the geometry is physically operative. In QMU, $\operatorname{temp}=c^2$ is the maximum allowable temperature unit, analogous to $c$ as the maximum allowable speed, and $\operatorname{curl}$ is a scalar QMU unit rather than the vector-calculus operator $\nabla\times$. The closure $A_u\operatorname{curl}=\operatorname{temp}$ couples the rotating-magnetic-field state of the Aether unit to the matter loading carried by the Ligamen Circulatus. The undeformed reference channel is selected by uniform winding, $d\phi/d\theta=2\xi$, where $\xi=\pm1$ denotes handedness and $h$ is reserved exclusively for Planck's constant. The first compatible deformation mode is $\phi_{\xi,\eta}(\theta)=\xi[2\theta+\eta\sin(2\theta)]$, with $|\eta|