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/sidebar/tabs/NodeLibrarySidebarTabV2.vue

@@ -20,7 +20,7 @@
             </DropdownMenuTrigger>
             <DropdownMenuPortal>
               <DropdownMenuContent
-                class="z-[9999] min-w-32 rounded-lg border border-border-default bg-comfy-menu-bg p-1 shadow-lg"
+                class="z-9999 min-w-32 rounded-lg border border-border-default bg-comfy-menu-bg p-1 shadow-lg"
                 align="end"
                 :side-offset="4"
               >
@@ -51,7 +51,7 @@
             </DropdownMenuTrigger>
             <DropdownMenuPortal>
               <DropdownMenuContent
-                class="z-[9999] min-w-32 rounded-lg border border-border-default bg-comfy-menu-bg p-1 shadow-lg"
+                class="z-9999 min-w-32 rounded-lg border border-border-default bg-comfy-menu-bg p-1 shadow-lg"
                 align="end"
                 :side-offset="4"
               >