Items with damage were disappearing from inventory or showing incorrect durabilityon 1.9+ clients due to missing damage serialization in both legacy and NBT formats.Root Cause:- Protocol_1_9.cpp: WriteItem() had damage field commented out (line 1646)- Protocol_1_13.cpp: WriteItem() was not serializing DamageComponent to NBT- Protocol_1_9.cpp: ParseItemMetadata() was not deserializing Damage from NBT- Server tracked damage internally but clients received items without damage data- This caused client-side "Window lost sync" errors and items appearing to disappearChanges:1. Protocol_1_9.cpp WriteItem():   - Uncommented and fixed damage field writing for 1.9-1.12.2 clients   - Now reads from DamageComponent and writes as BEInt162. Protocol_1_13.cpp WriteItem():   - Added DamageComponent serialization to NBT ("Damage" tag)   - Added UnbreakableComponent serialization to NBT ("Unbreakable" tag)3. Protocol_1_9.cpp ParseItemMetadata():   - Added deserialization for "Damage" NBT tag (TAG_Int case)   - Added deserialization for "Unbreakable" NBT tag (new TAG_Byte case)Affected Versions:- Fixes: All 1.9+ protocols (1.9, 1.10, 1.11, 1.12.2, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.20, 1.21)- Unaffected: 1.8 and earlier (use different damage system)Testing:- Code compiles successfully on Windows with MSVC 19.44- Server starts and accepts connections- Automated testing with Mineflayer bot confirms durability field now correct (0/59 vs previous garbage 2560/59)- Items successfully receive damage data in inventory sync packetsFixescuberite#5617

Maps were duplicating as "Map #0" instead of getting unique IDs because map IDs were never stored in item data.Root Cause:- ItemEmptyMap::OnItemUse() creates maps with unique IDs from MapManager- But the map ID was never stored in the cItem object- ItemMap::OnUpdate() always defaulted to map ID 0- This caused all maps to show as "Map #0" and duplicateChanges:1. Added MapIdComponent to DataComponents system:   - New component to store map IDs in item data   - Follows same pattern as RepairCostComponent2. ItemEmptyMap.h:   - Store newly created map ID in MapIdComponent when map is created3. ItemMap.h:   - Read map ID from MapIdComponent instead of defaulting to 0   - Early return if component is missing4. Protocol changes for all Minecraft versions:   Protocol_1_13.cpp (1.13+):   - Serialize MapIdComponent to NBT ("map" tag)   Protocol_1_9.cpp (1.9-1.12.2):   - Deserialize "map" NBT tag to MapIdComponent   - Write MapIdComponent to damage field (pre-1.13 behavior)   Protocol_1_8.cpp (1.8):   - Read map ID from damage field into MapIdComponent   Protocol_1_20.cpp/h (1.20+):   - Add ReadMapIdComponent and WriteMapIdComponent handlers   - Register component ID 26 in component map   Protocol_1_21.cpp (1.21+):   - Uncomment MapIdComponent handlers (IDs 36/37)Affected Versions:- Fixes: All protocols (1.8 through 1.21.x)Testing:- Code compiles successfully across all protocols- Build passes on Windows (MSVC), Linux (gcc/clang)Fixescuberite#5566

Jenkins CI has been non-functional for months and is confusing contributors.Every PR shows Jenkins failures even though the service is no longer maintained.Changes:- Removed Jenkinsfile (no longer used)- Updated README.md to show GitHub Actions badge instead- GitHub Actions is now the canonical CI systemFixescuberite#5634