refactor: Button components (#6929)

* feat: refactor button components

* fix: qa

* fix: storybook

* a11y: pass

* fix: build

* fix: rename default ->md

* fix: lint

* docs: buttons.md

* refactor part 1

* refactor part 2

* fix: undo refactor for fresh restart

* refactor

* Revert "refactor"

This reverts commit 96d65902d7.

* refactor: part 1

* fix: qa

* fix: qa

* fix: qa

* fix: qa

* fix: qa

* fix: qa

* fix: qa

* fix: qa

* fix: remove text-contrast

* fix: qa

* fix: v-tooltip

* fix: lint

* fix: split broken

* fix: passkey qa

* fix: qa

* fix: qa

* fix: prepr

* fix: splitbutton

* improve button group seam

---------

Signed-off-by: Calum H. <calum@modrinth.com>
Co-authored-by: Prospector <6166773+Prospector@users.noreply.github.com>

packages/ui/CLAUDE.md

@@ -26,7 +26,7 @@ Self-contained page layouts shared across frontends. Split into two categories:
 - **`shared/`** — Reusable layout modules with their own components, composables, providers, and types. Each module is a self-contained unit (e.g. `shared/content-tab/` contains the content/mods tab layout with its own `layout.vue`, `components/`, `composables/`, `providers/`, and `types.ts`).
 - **`wrapped/`** — Page-level Vue components that mirror route structures (e.g. `wrapped/hosting/manage/`). These are full page implementations consumed by both `apps/frontend` and `apps/app-frontend`.
 
-Files inside `layouts/` use the `#ui/*` import alias (resolved via the `"imports"` field in `package.json`) to reference other `src/` modules like `#ui/components/base/ButtonStyled.vue` or `#ui/composables/i18n`.
+Files inside `layouts/` use the `#ui/*` import alias (resolved via the `"imports"` field in `package.json`) to reference other `src/` modules like `#ui/components/base/buttons` or `#ui/composables/i18n`.
 
 # Code Guidelines