master
fix(appearance): close legacy runtime behavior parity
fix(audio): close processing lifecycle parity
fix(background): restore VK document playback
fix(filters): restore legacy ab semantics
fix(panel): restore font section and history parity
fix(messenger): close legacy interaction parity
fix(productivity): restore legacy productivity behavior
refactor(productivity): type bounded utility and profile features
refactor(runtime): add explicit feature reconciliation
fix(social): restore dynamic general behavior
refactor(theme): restore profile theme overlay
feat(diagnostics): expose bounded feature health
build(architecture): add shared unbundled extension layout