Add `CSP: sandbox` header for inline downloads to prevent attempts of reflected XSS.

[sonarcloud[bot]]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ac7fbbf) 87.34% compared to head (0b326cd) 87.34%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2642 +/- ## ========================================= Coverage 87.34% 87.34% Complexity 2648 2648 ========================================= Files 232 232 Lines 7080 7081 +1 Branches 1073 1073 ========================================= + Hits 6184 6185 +1 Misses 359 359 Partials 537 537 ```

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