feat: import saved XLSX results and TLA modes

Format payload-range distances consistently

Add batch variant time plots and publication sources

Display batch force values in kgf

Перевести диаграммы нагрузки на дальность маршрута

Refine LTX calculation workflow and exports

Align single-run XLSX export with UI engineering adjustments

Refine payload-range presentation and export contracts

Materialize legacy aircraft defaults in engineering settings dialog

Уточнить семантику маршрутных графиков и экспортов

fix: use local Python for macOS release runner

fix: align profile step parameters

feat: add single engine failure mode

fix: make macOS packaged smoke complete

feat: stabilize GP profile and modularize GUI

feat: add batch range time metrics

feat: refine range mission descent and Mach climb

Use system palette for engineering settings dialog

Unify LTX operational profile configuration

Refine range mission flight-level profiling and initial climb

Fix publication preview ranges and reset plot scenes

Restrict batch plot axes to directly varied inputs

Refine LTX calculation, validation, and export workflow