fix proxy.pac deployment and clean up dead passthroughs

- Add post-build step to copy proxy.pac into _site/assets/ since the
  Slinkity production build crashes before passthrough copies complete
- Remove dead videos passthrough (directory doesn't exist)
- Remove redundant images passthrough (Vite handles these via imports)
- Format .eleventy.js (consistent quotes, semicolons, trailing newline)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -31,6 +31,11 @@ jobs:
           npm run build || true
           test -f _site/index.html
 
+      - name: Copy passthrough files missed by broken Slinkity build
+        run: |
+          mkdir -p _site/assets
+          cp src/assets/proxy.pac _site/assets/proxy.pac
+
       - name: Configure SSH
         run: |
           mkdir -p ~/.ssh