- Add F-Droid changelogs (versionCode 15) - de-DE: Code-Qualität, Zero Warnings, ktlint, CI/CD - en-US: Code quality, Zero warnings, ktlint, CI/CD - Both under 500 characters as required - Update CHANGELOG.md / CHANGELOG.de.md - detekt: 29 → 0 issues - Build warnings: 21 → 0 - ktlint reactivated with .editorconfig - CI/CD lint checks integrated - Constants refactoring (Dimensions, SyncConstants) - Preparation for v2.0.0 legacy cleanup