Add Windows ico and Mac icns icons, fix release workflow

Windows builds require icon.ico for the resource file.
Removed .app directory upload (not needed, dmg is sufficient).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: kestermcullough

.github/workflows/release.yml

@@ -36,13 +36,6 @@ jobs:
           name: mac-dmg
           path: src-tauri/target/release/bundle/dmg/*.dmg
 
-      - name: Upload Mac App
-        uses: actions/upload-artifact@v4
-        with:
-          name: mac-app
-          path: src-tauri/target/release/bundle/macos/*.app
-          compression-level: 9
-
   build-windows:
     runs-on: windows-latest
     steps:

src-tauri/icons/icon.icns

@@ -31,7 +31,9 @@
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",
-      "icons/128x128@2x.png"
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
     ]
   }
 }