Disable full-width media in thread view

[Glitch] Fix thread lines in right-to-left locales (#24714)

Port 105f8687e465a7b3f9188c4959ecc1d858afee66 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Fix sass warning about deprecated slash as division (#24653)

Port 1527b02c6d7b542dfdfab41e55b8b8b437c8c46f to glitch-soc

Co-authored-by: Nick Schonning <nschonni@gmail.com>
Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Add lines to threads in web UI

Port 290e4aba3167b282c9ee1e966c840a490b7c818b to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Change label from "For you" to "People" on explore screen in web UI

Port 7cf963eec243e512e5db716467bb27e549cf46aa to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Change styling of the recommended accounts to allow bio to be more visible

Port e1b4eeb6367e0f4af64ed739ba20c9762dce43f5 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Use CSS to trim long card descriptions

Port e713c545b89ec86742161775b834c7f56d4377c2 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Fix infinite loop in emoji replacement code

Port fbb4de3dbc39e3874a257b37c5c5104e1f887c86 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Fix characters being emojified even when using Variation Selector 15 (text)

Port 37886c28da55c0e62cc9dbb24fb14c02b3789d0c to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

[Glitch] Allow `==` when null checking

Port c1a7e38d2b9504fe06716a56a1f6193686026c16 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

Fix `body_classes` test for glitch-soc

Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `.github/dependabot.yml`:
  Updated upstream, removed in glitch-soc to disable noise.
  Kept removed.
- `CODE_OF_CONDUCT.md`:
  Upstream updated to a new version of the covenant, but I have not read it
  yet, so kept unchanged.
- `Gemfile.lock`:
  Not a real conflict, one upstream dependency updated textually too close to
  the glitch-soc only `hcaptcha` dependency.
  Applied upstream changes.
- `app/controllers/admin/base_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/application_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/disputes/base_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/relationships_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/statuses_cleanup_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/helpers/application_helper.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/javascript/mastodon/features/compose/components/compose_form.jsx`:
  Upstream added a highlight animation for onboarding, while we changed the
  max character limit.
  Applied our local changes on top of upstream's new version.
- `app/views/layouts/application.html.haml`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `stylelint.config.js`:
  Upstream added ignore paths, glitch-soc had extra ignore paths.
  Added the same paths as upstream.

Fix thread lines in right-to-left locales (#24714)

Fix wrong classes `audio` and `video` instead of `audio-player` and `video-player` in CSS (#24711)

Change logged-out WebUI HTML pages to be cached for a few seconds (#24708)

Add default post text to onboarding flow in web UI (#24705)

Fix /api/v1/custom_emojis being cached even when unauthenticated API access is disallowed (#24665)

Change logo version in header based on screen size in web UI (#24707)

Remove display name input from sign-up form (#24704)

Change label from "For you" to "People" on explore screen in web UI (#24706)