fix: use wraith-logo.ico for installer icon and desktop shortcuts

Replaces default NSIS icon with the Wraith ghost logo. Icon included
in install directory for Start Menu and Desktop shortcut references.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/build-release.yml

@@ -319,7 +319,7 @@ jobs:
           InstallDirRegKey HKLM "Software\Wraith" "InstallDir"
           RequestExecutionLevel admin
 
-          !define MUI_ICON "${NSISDIR}\Contrib\Graphics\Icons\modern-install.ico"
+          !define MUI_ICON "wraith-logo.ico"
 
           !insertmacro MUI_PAGE_DIRECTORY
           !insertmacro MUI_PAGE_INSTFILES
@@ -330,11 +330,12 @@ jobs:
             File "wraith.exe"
             File "*.dll"
             File "version.json"
+            File "wraith-logo.ico"
 
             ; Start Menu shortcut
             CreateDirectory "$SMPROGRAMS\Wraith"
-            CreateShortcut "$SMPROGRAMS\Wraith\Wraith.lnk" "$INSTDIR\wraith.exe"
-            CreateShortcut "$DESKTOP\Wraith.lnk" "$INSTDIR\wraith.exe"
+            CreateShortcut "$SMPROGRAMS\Wraith\Wraith.lnk" "$INSTDIR\wraith.exe" "" "$INSTDIR\wraith-logo.ico"
+            CreateShortcut "$DESKTOP\Wraith.lnk" "$INSTDIR\wraith.exe" "" "$INSTDIR\wraith-logo.ico"
 
             ; Uninstaller
             WriteUninstaller "$INSTDIR\uninstall.exe"
@@ -365,8 +366,9 @@ jobs:
           # Replace VERSION placeholder
           sed -i "s/\${VERSION}/${VERSION}/g" /tmp/wraith-installer.nsi
 
-          # Copy NSIS script into dist so File directives find the binaries
+          # Copy NSIS script and icon into dist so File directives find them
           cp /tmp/wraith-installer.nsi dist/wraith-installer.nsi
+          cp images/wraith-logo.ico dist/wraith-logo.ico
           cd dist
           makensis -DVERSION="${VERSION}" wraith-installer.nsi
           mv wraith-setup.exe ../wraith-${VERSION}-setup.exe