Fix merged PR bugs and rewrite reduced-motion to pure CSS

- PR #64: fix typo "ad" → "add" in bookmark folder empty message
- PR #64: fix reducer using wrong key ('folder'/'title' → 'name')
- PR #84: implement confirm_unfollow using local_settings instead of
  server-side unfollowModal global
- PR #104: replace JS body-class approach with native CSS
  @media (prefers-reduced-motion) queries across all SCSS files
- Wide view: columns fill available space, content centered at 600px

Cherry-pick PR #104: Reduced motion accessibility

Adds prefers-reduced-motion support via JS body class detection and
CSS animation gating. Will be rewritten to pure CSS approach.

From: Moiety (https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/104)

Merge PR #84: Confirmation dialogs

Adds local settings to toggle confirmation dialogs for boost, favourite,
delete, and unfollow actions. Replaces server-side boostModal/deleteModal
globals with client-side local_settings.

From: Ittihadyya (https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/84)

Merge PR #64: Bookmark folders

Adds bookmark folder support: create/manage folders, assign bookmarks
to folders, browse bookmarks by folder. Also refactors alert/toast
system to support clickable actions.

From: mkljczk (https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/64)

[build] upgrade eslint to 9.37.0 (#88)

Co-authored-by: tobi <tobi.smethurst@protonmail.com>
Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/88
Co-authored-by: Zoë Bijl <moiety@noreply.codeberg.org>
Co-committed-by: Zoë Bijl <moiety@noreply.codeberg.org>

[feature] decouple login.scss from variables (#93)

Preparing for a switch to CSS variables

- decouple login.scss from variables.scss
- move scrollbar css to separate file

Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/93
Co-authored-by: Zoë Bijl <code@moiety.me>
Co-committed-by: Zoë Bijl <code@moiety.me>

[bugfix] correct import of `@rails/ujs` / fix lint issues (#92)

Details: https://github.com/rails/rails/issues/49768
Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/92
Co-authored-by: Zoë Bijl <code@moiety.me>
Co-committed-by: Zoë Bijl <code@moiety.me>

made fav & delete dialogs work on detailed posts – apparently i forgot to properly reference 'settings', now i feel really stupid :3

minor formatting fix

remove import of no import(ance)

reorder defaults and add default for favourite confirmation

implement functionality for favourite confirmation

favorite -> favourite, not sure if that's the preferred form but i've seen a lot more written that way within the repo, altho this is trivial to change. also added the string for translation

reordered settings in order of \'severity\' \(unfollow, delete, boost, fav\) and added the setting to allow confirmation of favorites

Implemented functionality for the setting governing delete confirmation dialogs

fix typo and reword setting to be consistent with \'confirm_VERB\'

tweaked wording

[build] upgrade to Prettier 3.6.2 (#86)

Upgrades Prettier to 3.6.2 and pins it there. Prettier [recommends pinning the version](https://prettier.io/docs/install#summary):

> Install an exact version of Prettier locally in your project. This makes sure that everyone in the project gets the exact same version of Prettier. Even a patch release of Prettier can result in slightly different formatting, so you wouldn’t want different team members using different versions and formatting each other’s changes back and forth.

---

Should probably merge after #85.

Co-authored-by: tobi <kipvandenbos@noreply.codeberg.org>
Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/86
Co-authored-by: Zoë Bijl <code@moiety.me>
Co-committed-by: Zoë Bijl <code@moiety.me>

removed \'boostModal\' and cleaned up the logic

[bugfix] Fix linter issues (#85)

- [x] .js
- [x] .json
- [x] .md
- [x] .scss
- [x] .yml

Reviewed-on: https://codeberg.org/superseriousbusiness/masto-fe-standalone/pulls/85
Co-authored-by: Zoë Bijl <code@moiety.me>
Co-committed-by: Zoë Bijl <code@moiety.me>