Add macOS/Linux build targets and update CI for all platforms

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Build Windows
+name: Build All Platforms
 
 on:
   push:
@@ -8,25 +8,60 @@ on:
   workflow_dispatch:
 
 jobs:
-  build:
+  build-windows:
     runs-on: windows-latest
-
     steps:
       - uses: actions/checkout@v4
-
       - uses: actions/setup-node@v4
         with:
           node-version: 24
           cache: npm
-
       - run: npm ci
-
-      - run: npx electron-builder --win portable
+      - run: npx electron-builder --win
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
       - uses: actions/upload-artifact@v4
         with:
-          name: Helix-portable
-          path: dist/Helix*.exe
+          name: Helix-Windows
+          path: |
+            dist/Helix Setup *.exe
+            dist/Helix *.exe
+          if-no-files-found: error
+
+  build-macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+      - run: npm ci
+      - run: npx electron-builder --mac
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - uses: actions/upload-artifact@v4
+        with:
+          name: Helix-macOS
+          path: dist/*.dmg
+          if-no-files-found: error
+
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+      - run: npm ci
+      - run: npx electron-builder --linux
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - uses: actions/upload-artifact@v4
+        with:
+          name: Helix-Linux
+          path: |
+            dist/*.AppImage
+            dist/*.deb
           if-no-files-found: error