* fix: fix multiplayer player data mix between different players bug
Fixes a Win64 multiplayer issue where player data (`players/*.dat`) could be mismatched because identity was effectively tied to connection-order `smallId` XUIDs.
Introduces a deterministic username-derived persistent XUID and integrates it into the existing XUID-based save pipeline.
- Added `Windows64_NameXuid` for deterministic `name -> persistent xuid` resolution
- On Win64 login (`PlayerList`), set `ServerPlayer::xuid` from username-based resolver
- Aligned local player `xuid` assignment (`Minecraft`) for create/init/respawn paths to use the same resolver
- Added Win64 local-self guard in `ClientConnection::handleAddPlayer` using name match to avoid duplicate local remote-player creation
- Kept `IQNet::GetPlayerByXuid` compatibility fallback behavior, while extending lookup to also resolve username-based XUIDs
- Moved implementation to `Minecraft.Client/Windows64/Windows64_NameXuid.h`; kept legacy `Win64NameXuid.h` as compatibility include
Rename migration is intentionally out of scope (same-name identity only).
* fix: preserve legacy host xuid (base xuid + 0) for existing world compatibility
- Add legacy embedded host XUID helper (base + 0).
- When Minecraft.Client is hosting, force only the first host player to use legacy host XUID.
- Keep name-based XUID for non-host players.
- Prevent old singleplayer/hosted worlds from losing/mismatching host player data.
* update: migrate Win64 player uid to `uid.dat`-backed XUID and add XUID based duplicate login guards
- Replace Win64 username-derived XUID resolution with persistent `uid.dat`-backed identity (`Windows64_Xuid` / `Win64Xuid`).
- Persist a per-client XUID next to the executable, with first-run generation, read/write, and process-local caching.
- Keep legacy host compatibility by pinning host self to legacy embedded `base + 0` XUID for existing world/playerdata continuity.
- Propagate packet-authoritative XUIDs into QNet player slots via `m_resolvedXuid`, and use it for `GetXuid`/`GetPlayerByXuid` with legacy fallback.
- Update Win64 profile/network paths to use persistent XUID for non-host clients and clear resolved identity on disconnect.
- Add login-time duplicate checks: reject connections when the same XUID is already connected (in addition to existing duplicate-name checks on Win64).
- Add inline compatibility comments around legacy/new identity coexistence paths for easier future maintenance.
* update: ensure uid.dat exists at startup in client mode for multiplayer
* Fix world save rename not applying new name
KeyboardCompleteWorldNameCallback had no _WINDOWS64 branch, so the
typed name was validated then silently discarded on every rename attempt.
Write the new name to a worldname.txt sidecar file next to the save
(Windows64\GameHDD\{folder}\worldname.txt) and update the in-memory
display name immediately. ReadLevelNameFromSaveFile now checks for this
sidecar first so renamed saves persist correctly across restarts.
* Fixed gamertag being blank upon renaming and re-joining a save
* Save deletion fix, exiting without saving fix
* Add native in-game keyboard UI for world naming and renaming
* fix saving issue & multiple username implementations
* Update README.md
Updated the method for overriding in-game username from '-name' to 'username.txt'.
* remove unused include i forgot to get rid of while testing
- Skip QuadrantSignin (profile selector) on Windows64 in both LoadMenu
and CreateWorldMenu, proceeding directly to local play since Xbox Live
stubs always return true for IsSignedInLive()
- Fix IsLocalMultiplayerAvailable() to not require IsHiDef() on Windows64
- Allow pad-connected players to join without a profile sign-in check
- Fix ghost RemotePlayer creation by scanning all local player slots and
matching on server-assigned player index rather than controller slot,
fixing P3/P4 ghost entities when joining out of controller order
- Give each player a unique name (Player 1-4) based on controller index
instead of a single shared stub name
- Use raw XInput (XInputGetState) for secondary controller join detection,
bypassing the 4J toggle system which consumes all button presses before
game logic runs; uses a 120-frame latch for a reliable detection window
- Add .gitignore for Visual Studio build artifacts and output directories
