Double-Leaf Fire-Door Rebated Astragal & EN 1158 Coordinator Geometry Solver

Deterministic Circular arc locus of trailing corner R_diag = hypot(W_leaf, T_leaf) + EN 1158 coordinator trigger arm kinematics engine (.dxf, .pdf) built for Dormakaba SR, GEZE ISM, Dictator, CISA — zero-upload ephemeral Wasm RAM execution.

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