Option to Hide Sensitive Content does not appear if Sensitive Content is set to show by default

**Describe the bug**
A clear and concise description of what the bug is.
- Which site: `phanpy.social`
- Which site version: `2024.08.31.1b8ab47`
- Which instance: [eldritch.cafe](https://eldritch.cafe/)

**To Reproduce**
1. In Mastodon Preferences -> Appearance
2. Set Media display to "Always show media"
3. See a post with Sensitive Content.
There is no way to hide the sensitive content without filtering the post (which seemingly can't be done on Phanpy? but that's a separate issue...)

**Expected behaviour**
Content appears, but I should still have the option to hide the content.
This is the behaviour on my instance's home web interface, glitch.soc.

**Desktop (please complete the following information):**
- Browser: `Firefox 131.0 (64-bit)`

Reproduce the issue using the listed Mastodon Appearance setting and a post marked as sensitive. Trace the sensitive-content media controls in the frontend and how the "Always show media" preference is handled. Done means sensitive content appears by default while still offering an option to hide it.

Written by the indexing model from the issue text.