Expand CI matrix to cover all required platforms

Test on:
- macOS ARM64 (macos-latest - Apple Silicon)
- macOS x64 (macos-13 - Intel)
- Linux x64 (ubuntu-latest)
- Linux ARM64 (ubuntu-latest-arm64)
- Windows x64 (windows-latest)

Both Node.js 22.x and Electron 39.2.7 workflows now test all platforms.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: rathboma

.github/workflows/electron.yml

@@ -14,7 +14,22 @@ jobs:
       fail-fast: false
       matrix:
         electron-version: ['39.2.7']
-        os: [ubuntu-latest]
+        include:
+          # macOS ARM64 (Apple Silicon)
+          - os: macos-latest
+            electron-version: '39.2.7'
+          # macOS x64 (Intel)
+          - os: macos-13
+            electron-version: '39.2.7'
+          # Linux x64
+          - os: ubuntu-latest
+            electron-version: '39.2.7'
+          # Linux ARM64
+          - os: ubuntu-latest-arm64
+            electron-version: '39.2.7'
+          # Windows x64
+          - os: windows-latest
+            electron-version: '39.2.7'
 
     steps:
     - name: Checkout code

.github/workflows/nodejs.yml

@@ -13,8 +13,22 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [22.x]
-        os: [ubuntu-latest]
+        include:
+          # macOS ARM64 (Apple Silicon)
+          - os: macos-latest
+            node-version: 22.x
+          # macOS x64 (Intel)
+          - os: macos-13
+            node-version: 22.x
+          # Linux x64
+          - os: ubuntu-latest
+            node-version: 22.x
+          # Linux ARM64
+          - os: ubuntu-latest-arm64
+            node-version: 22.x
+          # Windows x64
+          - os: windows-latest
+            node-version: 22.x
 
     steps:
     - name: Checkout code