Restructure step R: the app is Starsync (dev.foxyz.starsync)

- Linux app id dev.foxyz.starsync, binary starsync; Windows starsync.exe,
  company foxyz; server starsync-server; Dart package starsync; archives
  starsync-<ver>-*.
- 1.2.x compatibility: watch_together and watch-together-server
  launchers (Linux) / copies (Windows) in the archive; the updater
  accepts both names and relaunches the new binary; update.sh/.bat use
  whichever server exists.
- First start copies (never moves) the old support folder and this
  app's Hive boxes out of ~/Documents into <support>/hive; a marker
  makes it run once; AppDirs is a port; settings schema version with
  ordered migrations.
- Launcher entry dev.foxyz.starsync.desktop; the old one removed.
- Repository name and URLs unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tool/package_windows.ps1

@@ -1,19 +1,21 @@
 # Package the Windows release bundle into a versioned zip.
 # Usage: powershell -File tool/package_windows.ps1 [-SkipBuild]
-# Output: dist/watch-together-<version>-windows-x64.zip containing one
-# top-level folder with watch_together.exe, its DLLs and data/ as built,
-# plus update.bat (runs watch-together-server.exe --upgrade) and
-# watch-together-server.exe (dedicated server, `dart compile exe` of
-# packages/server/bin/server.dart; both binaries stamped with APP_VERSION).
-# Same layout as tool/package_linux.sh; the updater strips the top-level
-# folder.
+# Output: dist/starsync-<version>-windows-x64.zip containing one
+# top-level folder starsync-<version>/ with starsync.exe, its DLLs and
+# data/ as built, plus update.bat (runs starsync-server.exe --upgrade) and
+# starsync-server.exe (dedicated server, `dart compile exe` of
+# packages/server/bin/server.dart; both binaries stamped with APP_VERSION),
+# and copies of both under the names up to 1.2.x (watch_together.exe,
+# watch-together-server.exe: a 1.2.x updater checks for and restarts its
+# own name). Same layout as tool/package_linux.sh; the updater strips the
+# top-level folder.
 # Needs: flutter on PATH, tar.exe (ships with Windows 10+, writes zip).
 param([switch]$SkipBuild)
 $ErrorActionPreference = 'Stop'
 
 $Root = Split-Path -Parent $PSScriptRoot
 $App = Join-Path $Root 'apps/desktop'
-$Name = 'watch-together'
+$Name = 'starsync'
 $Arch = 'x64'
 
 $Version = (Select-String -Path "$App/pubspec.yaml" -Pattern '^version: ([0-9.]+)').Matches[0].Groups[1].Value
@@ -58,7 +60,7 @@ if (-not $SkipBuild) {
 }
 
 $Bundle = Join-Path $App "build/windows/$Arch/runner/Release"
-if (-not (Test-Path "$Bundle/watch_together.exe")) { throw "bundle missing (build first): $Bundle" }
+if (-not (Test-Path "$Bundle/starsync.exe")) { throw "bundle missing (build first): $Bundle" }
 
 $Stage = Join-Path $App 'build/package-stage'
 $Dist = Join-Path $Root 'dist'
@@ -68,12 +70,14 @@ if (Test-Path $Stage) { Remove-Item -Recurse -Force $Stage }
 New-Item -ItemType Directory -Force "$Stage/$Folder", $Dist | Out-Null
 Copy-Item -Recurse "$Bundle/*" "$Stage/$Folder/"
 Copy-Item "$App/lib/src/update/bundle/update.bat" "$Stage/$Folder/update.bat"
+Copy-Item "$Stage/$Folder/starsync.exe" "$Stage/$Folder/watch_together.exe"
 
 Push-Location (Join-Path $Root 'packages/server')
 try {
   Invoke-Checked 'dart pub get' { dart pub get | Out-Null }
-  Invoke-Checked 'dart compile exe' { dart compile exe "--define=APP_VERSION=$Version" bin/server.dart -o "$Stage/$Folder/watch-together-server.exe" }
+  Invoke-Checked 'dart compile exe' { dart compile exe "--define=APP_VERSION=$Version" bin/server.dart -o "$Stage/$Folder/starsync-server.exe" }
 } finally { Pop-Location }
+Copy-Item "$Stage/$Folder/starsync-server.exe" "$Stage/$Folder/watch-together-server.exe"
 
 if (Test-Path $Zip) { Remove-Item -Force $Zip }
 # bsdtar writes forward-slash entry names (Compress-Archive on 5.1 doesn't).