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/platform/workspace/components/WorkspaceSwitcherPopover.vue

@@ -68,11 +68,11 @@
       </template>
 
       <!-- Create workspace button -->
-      <div class="px-2 py-2">
+      <div class="p-2">
         <div
           :class="
             cn(
-              'flex h-12 w-full items-center gap-2 rounded-sm px-2 py-2',
+              'flex h-12 w-full items-center gap-2 rounded-sm p-2',
               canCreateWorkspace
                 ? 'cursor-pointer hover:bg-secondary-background-hover'
                 : 'cursor-default'