fix(launcher): force .MPQ extension uppercase on disk for WoW compatibility

Co-authored-by: Cursor <cursoragent@cursor.com>

tools/fractured-launcher-electron/README.md

@@ -169,5 +169,5 @@ Schema is defined by **`default-launcher.json`** (shipped in the app; first run
 - **`gitea`**: **`base_url`**, **`owner`**, **`repo`**, **`release_tag`**, **`token_env`** — when **`base_url`** is set (and owner/repo set), **`from_release`** downloads and (with token if needed) the **generic** updater feed use **Gitea**. **Required** for players if your CI mirrors patches/launchers to Gitea only.
 - **`github`**: used for **non-release** repo paths (`from_release`: false) and for **GitHub** **`from_release`** when **`gitea.base_url`** is empty.
 - **`patch_manifest`**: **`enabled`**, **`source`** (default `patch-manifest.json`), **`from_release`** — checksum-based skip + verify (see above).
-- **`files`**: default **`[]`**. **Download updates** resolves what to pull in order: (**1**) non-empty **`files`** if you set explicit **`source`** → **`dest`** pairs; (**2**) else each key in **`patch-manifest.json`** on the release (recommended); (**3**) else release attachments except launcher artifacts (`Fractured-Launcher*`, `*.blockmap`, `latest*.yml`, `.AppImage`, `patch-manifest.json`): **`.MPQ`** → **`Data/enUS/`**, one **`.exe`** → **`launch.exe`**. Multiple `.exe` attachments require a manifest. Legacy **`Wow-patched.exe`** entries are removed when merging **`launcher.json`**.
+- **`files`**: default **`[]`**. **Download updates** resolves what to pull in order: (**1**) non-empty **`files`** if you set explicit **`source`** → **`dest`** pairs; (**2**) else each key in **`patch-manifest.json`** on the release (recommended); (**3**) else release attachments except launcher artifacts (`Fractured-Launcher*`, `*.blockmap`, `latest*.yml`, `.AppImage`, `patch-manifest.json`): **`.MPQ`** → **`Data/enUS/<name>.MPQ`** (extension forced to **`.MPQ`** caps for client compatibility), one **`.exe`** → **`launch.exe`**. Multiple `.exe` attachments require a manifest. Legacy **`Wow-patched.exe`** entries are removed when merging **`launcher.json`**.
 - **`realmlist`**, **`auth`**, **`launch`**.

tools/fractured-launcher-electron/lib/patch.js

@@ -45,10 +45,16 @@ function wowInstallValid(cfg) {
   return fsSync.existsSync(p) && fsSync.statSync(p).isFile();
 }
 
+/** WoW expects patch MPQ names with a literal .MPQ extension (case-sensitive clients). */
+function normalizeMpqDestinationPath(absPath) {
+  const s = String(absPath || '');
+  return /\.mpq$/i.test(s) ? s.replace(/\.mpq$/i, '.MPQ') : s;
+}
+
 async function installFile(cfg, entry) {
   const parts = String(entry.dest).replace(/\\/g, '/').split('/').filter(Boolean);
   const root = normalizeWinGameDir(cfg.game_dir || '');
-  const destAbs = path.join(root, ...parts);
+  const destAbs = normalizeMpqDestinationPath(path.join(root, ...parts));
   if (entry.backup) {
     try {
       const st = await fs.stat(destAbs);

tools/fractured-launcher-electron/lib/release-sync.js

@@ -39,7 +39,8 @@ function isExcludedFromGameSync(fileName) {
 
 function mpqDestFromSource(source) {
   const base = path.basename(String(source || ''));
-  return `Data/enUS/${base}`;
+  const stem = base.replace(/\.mpq$/i, '');
+  return `Data/enUS/${stem}.MPQ`;
 }
 
 function destForReleaseSource(source, cfg) {

tools/fractured-launcher-electron/package.json

@@ -1,6 +1,6 @@
 {
   "name": "fractured-launcher-electron",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "description": "Fractured WoW launcher (Electron) — no console window, native folder picker, auto-update",
   "main": "main.js",
   "repository": {