feat(ci): add workflow_dispatch for manual trigger

Allows manual execution from Gitea Actions UI

.gitea/workflows/deploy-seedbox.yml

@@ -9,6 +9,7 @@ on:
     branches: [main]
     paths:
       - 'seedbox/**'
+  workflow_dispatch:
 
 jobs:
   deploy:
@@ -44,7 +45,7 @@ jobs:
           echo "Validation complete."
 
       - name: Deploy to seedbox
-        if: github.event_name == 'push'
+        if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
         run: |
           ssh -o StrictHostKeyChecking=accept-new debian@seedbox.taila5ad8.ts.net << 'ENDSSH'
             set -e
@@ -80,7 +81,7 @@ jobs:
           ENDSSH
 
       - name: Deployment summary
-        if: github.event_name == 'push'
+        if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
         run: |
           echo "✅ Deployment complete!"
           echo ""