Miserere v0.3.0 — preset system, factory presets, German localisation
Adds the suite-wide M2 preset system (PresetManager/PresetBar, ported from basilica-audio/nave's pilot implementation): factory and user presets, save/save-as/rename/delete, next/previous, single-file and zip-bank import/export, and a "Default"-preset resolution order. Ten factory presets ship in the box (Default, Classic Parallel Blend, Crush Forward, Silk Sandwich, Wide & Wet, Direct Channel Only, Gentle Bus, Rough Mix Glue, Whisper Thicken, Aggressive Rock Vocal — see docs/presets.md for each one's intent). The preset bar's frame strings (buttons, menus, dialogs, error messages) ship with a German translation (resources/i18n/de.txt); parameter/DSP terminology is never translated. 122 Catch2 tests green (20 new).
Assets: the Windows build is attached. The signed macOS build failed again at the "Import signing certificate" step (known organization-level signing-secret issue, not specific to this release — see run 29476155353, job Signed macOS release / 87549484862) and will be attached in a follow-up run once that secret is fixed.