fix: enable enforce-canonical-classes tailwind lint rule (#9427)

## Summary

Enable `better-tailwindcss/enforce-canonical-classes` lint rule and
auto-fix all 611 violations across 173 files. Stacked on #9417.

## Changes

- **What**: Simplify Tailwind classes to canonical forms via `eslint
--fix`:
  - `h-X w-X` → `size-X`
  - `overflow-x-hidden overflow-y-hidden` → `overflow-hidden`
  - and other canonical simplifications
- Enable `enforce-canonical-classes` as `'error'` in eslint config

## Review Focus

Mechanical auto-fix PR — all changes produced by `eslint --fix`. No
visual or behavioral changes; canonical forms are functionally
identical.

**Stack:** #9417 → **this PR** → PR 3 (class order)

Fixes #9300 (partial — 2 of 3 rules)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9427-fix-enable-enforce-canonical-classes-tailwind-lint-rule-31a6d73d365081a49340d7d4640ede45)
by [Unito](https://www.unito.io)

src/components/error/ErrorOverlay.vue

@@ -32,12 +32,12 @@
             <li
               v-for="(message, idx) in groupedErrorMessages"
               :key="idx"
-              class="flex items-baseline gap-2 text-sm leading-snug text-muted-foreground min-w-0"
+              class="flex items-baseline gap-2 text-sm/snug text-muted-foreground min-w-0"
             >
               <span
                 class="mt-1.5 size-1 shrink-0 rounded-full bg-muted-foreground"
               />
-              <span class="break-words line-clamp-3 whitespace-pre-wrap">{{
+              <span class="wrap-break-word line-clamp-3 whitespace-pre-wrap">{{
                 message
               }}</span>
             </li>