fix: enable enforce-consistent-class-order tailwind lint rule (#9428)

## Summary

Enable `better-tailwindcss/enforce-consistent-class-order` lint rule and
auto-fix all 1027 violations across 263 files. Stacked on #9427.

## Changes

- **What**: Sort Tailwind classes into consistent order via `eslint
--fix`
- Enable `enforce-consistent-class-order` as `'error'` in eslint config
- Purely cosmetic reordering — no behavioral or visual changes

## Review Focus

Mechanical auto-fix PR — all changes are class reordering only. This is
the largest diff but lowest risk since it changes no class names, only
their order.

**Stack:** #9417 → #9427 → **this PR**

Fixes #9300 (partial — 3 of 3 rules)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9428-fix-enable-enforce-consistent-class-order-tailwind-lint-rule-31a6d73d3650811c9065f5178ba3e724)
by [Unito](https://www.unito.io)

src/components/input/SingleSelect.vue

@@ -40,7 +40,7 @@
       },
       overlay: {
         class: cn(
-          'mt-2 p-2 rounded-lg',
+          'mt-2 rounded-lg p-2',
           'bg-base-background text-base-foreground',
           'border border-solid border-border-default'
         )
@@ -57,7 +57,7 @@
       option: ({ context }: SelectPassThroughMethodOptions<SelectOption>) => ({
         class: cn(
           // Row layout
-          'flex items-center justify-between gap-3 px-2 py-3 rounded-sm',
+          'flex items-center justify-between gap-3 rounded-sm px-2 py-3',
           'hover:bg-secondary-background-hover',
           // Add focus state for keyboard navigation
           context.focused && 'bg-secondary-background-hover',