Contents Director

Added

• Manual CurseForge download fallback with browser/copy/select and Downloads-directory detection.
• Japanese and Simplified Chinese UI translations.
• Localization documentation and regression coverage for complete key sets, placeholders, external overrides, and fallback behavior.
• Linux and Windows CI coverage with a Java 8 test runtime.
• Regression tests for installer staging/commit behavior, network redirects/errors, partial downloads, provider response validation, side metadata, remote configuration safety, and offline startup paths.

Changed

• Installation now separates pre-install resolution, staging, hash validation, commit, and deferred cleanup responsibilities.
• Provider configuration can use explicit filenames to avoid unnecessary metadata queries when resolving already-installed files.
• Jackson dependencies are aligned through a common BOM.
• Java compilation explicitly uses UTF-8 for cross-platform source consistency.
• macOS interactive Swing UI is isolated in an external helper JVM.

Fixed

• Existing live files are preserved when staging or hash validation fails.
• Hash validation checks all supported configured digests and accepts case-insensitive hexadecimal input.
• Archive extraction and modify operations reject paths that escape their allowed roots or traverse symbolic links.
• URL extraction rejects unsupported/malformed non-ZIP archives instead of silently treating them as empty ZIP content.
• Cross-task supersede cleanup no longer removes files published by another install task.
• Omitted metadata side is treated as unrestricted.
• Remote configuration files are parsed in memory, use URL basenames only for type dispatch, reject recursion cycles/depth overflow, and validate bundle modify paths before mutations.
• External localization overrides now resolve through absolute filesystem paths consistently across Windows, Linux, and macOS.
• Partial translations fall back to canonical English instead of an unrelated JVM system-locale bundle.

Known limitations

• NeoForge 1.21.9+ loader integration is not yet supported; tracked in #19.
• The macOS external UI helper does not yet inherit the configured UI theme; tracked in #23.