Hartogs bulk projection

For each admitted hom-object locus, the local T^2-fiber acts as a two-dimensional boundary surface carrying the four-atom character data. Hartogs-type extension projects this boundary data into a local three-dimensional bulk. The bulk is therefore not inserted as hidden space; it is the interior determined by the boundary grammar. At this stage the theorem is local: each admissible boundary determines its own bulk patch. The three-effective-dimensional readout remains subject to Book III’s stated dimensional-accounting caveat. What remains unproved here is whether all such patches glue into one coherent carrier.