feat(launcher): Linux play wrapper, patch UX, Gitea sync cleanup

- Play on Linux: use launch.linux_wrapper (wine) or linux_steam_uri; chmod .exe after install
- Windows: retry EBUSY on MPQ replace; download to .new before rename
- After successful sync: remove .bak-* backups; realmlist only Data/enUS (ignore enGB)
- Gitea/distro merge: skip Fractured-Launcher* from GitHub assets (CI default-branch build wins)
- Omit blockmap and builder-debug from staged artifacts and Gitea uploads; upload script validates before clearing attachments
- README and launcher version 1.0.12

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

.github/workflows/distro-release-sync.yml

@@ -74,8 +74,6 @@ jobs:
           if (Test-Path tools/fractured-launcher-electron/dist/latest.yml) {
             Copy-Item tools/fractured-launcher-electron/dist/latest.yml launcher-publish/
           }
-          Get-ChildItem tools/fractured-launcher-electron/dist/*.blockmap -ErrorAction SilentlyContinue |
-            Copy-Item -Destination launcher-publish/
 
       - uses: actions/upload-artifact@v4
         with:
@@ -87,6 +85,13 @@ jobs:
     if: github.repository == 'Dawnforger/Fractured'
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.repository.default_branch }}
+          sparse-checkout: |
+            tools/fractured-launcher-electron/scripts
+          sparse-checkout-cone-mode: true
+
       - uses: actions/download-artifact@v4
         with:
           name: electron-dist
@@ -97,6 +102,7 @@ jobs:
           GH_TOKEN: ${{ github.token }}
         run: |
           set -euo pipefail
+          . tools/fractured-launcher-electron/scripts/release-sync-filters.sh
           TAG="${{ needs.meta.outputs.tag }}"
           mkdir -p combined
           mkdir -p /tmp/from-main
@@ -104,6 +110,11 @@ jobs:
             shopt -s nullglob
             for f in /tmp/from-main/*; do
               if [ -f "$f" ]; then
+                bn=$(basename "$f")
+                if should_skip_merge_from_github "$bn"; then
+                  echo "Skipping GitHub release asset (CI launcher or excluded): $bn"
+                  continue
+                fi
                 cp -f "$f" combined/
               fi
             done