Bassport Pro

- Improved bass reflex calculations: unified speed-of-sound model with temperature, revised port end correction, and consistent formulas between Design and Tuning. - Added advanced port parameters: selectable end conditions, port-count support, slot-port support, and better warnings for unreachable geometry. - Updated port-velocity calculation: results now explicitly show Peak Mach based on `Xmax` and selected frequency. - Improved quarter-wave resonator calculation: temperature support and optional open-end correction. - Updated power cable calculator: selectable conductor material (Copper/CCA/Al), amplifier-class efficiency presets, and refined current model. - Refined box-volume calculator: dimension units (mm/cm/in), correct conversions, and single-unknown-side solve mode. - Improved interface: haptic feedback on toggles, hidden scroll indicators, and clearer hints/warnings on calculation screens. - Localization fixes: removed mixed-language strings, translated new fields/results/FAQ into supported languages, and improved term consistency on bass reflex screens.