A 'cache control' header is missing or empty webkit

### Describe the bug

A cache control header is mising or empty
meta[name=theme-color]' is not supported by Firefox.
Button type attribute has not been set.

### To Reproduce

_No response_

### Expected behavior

A cache control header is mising or empty
meta[name=theme-color]' is not supported by Firefox.
Button type attribute has not been set.

### Additional context

A cache control header is mising or empty
meta[name=theme-color]' is not supported by Firefox.
Button type attribute has not been set.

The report names no files, tests, or entry points. Start by searching the repository for the web-facing assets or configuration related to the cache-control header, theme-color metadata, and button markup, then reproduce the reported browser audit warnings. Done means the relevant WebKit and Firefox checks no longer report these issues.

Written by the indexing model from the issue text.