Update workflows to run on main/master pushes and all PRs

Workflows now run on:
- Push to master or main branches
- All pull requests (regardless of target branch)

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

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

Author: rathboma

.github/workflows/electron.yml

@@ -2,6 +2,7 @@ name: Electron CI
 
 on:
   push:
+    branches: [ master, main ]
   pull_request:
 
 jobs:

.github/workflows/nodejs.yml

@@ -2,6 +2,7 @@ name: Node.js CI
 
 on:
   push:
+    branches: [ master, main ]
   pull_request:
 
 jobs: