World Mirror

Added

• Chunk Map (Window 1): Full-screen draggable grid map accessible from the status screen (Conflicts tab → Open Chunk Map). Each cell is color-coded:
  • Transparent — never downloaded.
  • Green → Blue (logarithmic, based on age) — downloaded via world_mirror.
  • Orange — written by a third-party source (e.g. player, map_hp).
  • Red inset border — chunk has an unresolved conflict stored on disk. Hovering shows a tooltip with chunk coordinates, last-update time, and source. Clicking a conflicted chunk opens a per-chunk dialog: Overwrite / Discard / Cancel.
• File-based conflict storage: When the Manual conflict strategy is active, incoming server chunks that collide with existing local chunks are now written to conflict_chunks/<dim>/r.X.Z.mca inside the mirror-world folder (MCA format) rather than being lost on restart.
• Conflicts tab — bulk resolution: Overwrite All (apply all stored server chunks) and Discard All (delete all stored server chunks, keep local) buttons in the status screen.
• Export Nearby Region (Feature 2.1): New screen (Status tab → Export Nearby Region…) lets you choose a world name and radius (1–50 chunks) to snapshot all loaded chunks in that area into a fresh singleplayer save. Spawn point is set to the player's current block position.
• Direct Chunk Map keybinding: Press M to open the chunk map without going through the status screen. The binding is configurable in Options → Controls → World Mirror.
• Chunk map settings: Added configurable sparse-render threshold (4–16, default 8) and map background style (black or transparent, default black).
• MCA write support: Added shared per-file locking and same-directory temporary-file replacement for terrain, entity, and conflict MCA writes.
• Known-bugs research notes: Re-enabled and expanded KNOWN_BUGS.md with current entity, block entity, world-generation/noise, heightmap, and lighting persistence gaps, plus pointers into Minecraft format docs and local mod source.
• Language file additions for all new UI strings (en_us, zh_cn, zh_tw, ja_jp).

Changed

• Status screen Conflicts tab redesigned: shows stored-conflict count instead of in-memory queue, with Overwrite All / Discard All / Open Chunk Map buttons.
• Status screen Status tab: added Export Nearby Region… button.
• Dimension and server-world transition detection logs now use debug level instead of info level.
• Chunk map rendering switches to sparse drawing when zoomed far out, avoiding full-grid per-cell drawing at tiny cell sizes.
• Background exports are no longer daemon threads, reducing the chance of JVM shutdown cutting off an in-progress save write.

Fixed

• CI/CD: Added -Djsse.enableSNIExtension=false JVM argument to gradle.properties to fix TLS SNI handshake failures with server.bbkr.space in the GitHub Actions environment.
• Export requests made while another export is running are queued and coalesced instead of being dropped.
• Chunks are only marked written after their region file has been flushed successfully, so failed region writes stay cached for a later retry.
• Region and conflict writes now share per-file locks, reducing races between normal export, manual conflict storage, and conflict resolution.
• Bulk conflict overwrite now maps legacy conflict folders (region, DIM-1, DIM1) back to the mod's current per-dimension world folder layout.
• Cleaned up several definite IDE warnings in mod-owned code without changing mixin method signatures or Minecraft mapping-sensitive casts.