Trigger nightly release on every push to main

- nightly.yml: Add push trigger for main branch, create release immediately
- build.yml: Remove push to main trigger to avoid duplicate builds
- Build workflow now only runs on tags (releases) and PRs

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

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

Author: chengzeyi

.github/workflows/build.yml

@@ -2,7 +2,6 @@ name: Build
 
 on:
   push:
-    branches: [main]
     tags:
       - 'v*'
   pull_request:

.github/workflows/nightly.yml

@@ -1,13 +1,17 @@
 name: Nightly Build
 
 on:
+  push:
+    branches: [main]
   schedule:
     # Run at 2:00 AM UTC every day
     - cron: '0 2 * * *'
   workflow_dispatch:
 
 jobs:
   check-changes:
+    # Only check for changes on scheduled runs
+    if: github.event_name == 'schedule'
     runs-on: ubuntu-latest
     outputs:
       should_build: ${{ steps.check.outputs.should_build }}
@@ -30,7 +34,8 @@ jobs:
 
   build:
     needs: check-changes
-    if: needs.check-changes.outputs.should_build == 'true' || github.event_name == 'workflow_dispatch'
+    # Build on push, workflow_dispatch, or if scheduled and has changes
+    if: always() && (github.event_name == 'push' || github.event_name == 'workflow_dispatch' || needs.check-changes.outputs.should_build == 'true')
     strategy:
       matrix:
         include: