fix: TypeScript errors + workflow pipeline ordering

- Fix hls! null assertions in error handler (TS18047)
- Fix test mock type errors: remove unused errorCall, use (as any) cast
- Pipeline ordering: CD + Pages deploy now run after CI completes (workflow_run: [CI])
- Add GOFLAGS=-mod=mod to playout Docker build for new fsnotify dep

.gitea/workflows/pages-deploy.yml

@@ -1,12 +1,14 @@
 name: Deploy to Cloudflare Pages
 
 on:
-  push:
-    branches: ["main"]
+  workflow_run:
+    workflows: [CI]
+    types: [completed]
   workflow_dispatch: {}
 
 jobs:
   deploy:
+    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
     runs-on: ubuntu-latest
     steps:
       - name: Checkout