Gauss-Riemann Spectral Calculus, Part III: Structural Atoms, Observation Calculus, Human-AI Workflow, and Future Directions

Part III of the first Gauss-Riemann Spectral Calculus (GRSC) programme series contains Papers 11-15. It introduces Gaussian structural atoms, records a programme-scale human-AI mathematical research workflow, develops the route from bridge existence to explanatory mechanism, abstracts GRSC as a general observation calculus, and closes with future directions for the system. The package is an outlook and framework artifact rather than a forced final Landau-route proof.