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/sidebar/tabs/nodeLibrary/EssentialNodesPanel.vue

@@ -2,7 +2,7 @@
   <TabsContent
     ref="panelEl"
     value="essentials"
-    class="flex-1 overflow-y-auto px-3 h-full"
+    class="h-full flex-1 overflow-y-auto px-3"
   >
     <div class="flex flex-col gap-2 pb-6">
       <!-- Flat sorted grid when alphabetical -->
@@ -28,7 +28,7 @@
           @update:open="toggleFolder(folder.key, $event)"
         >
           <CollapsibleTrigger
-            class="group flex w-full cursor-pointer items-center justify-between border-0 bg-transparent py-3 px-1 text-xs font-medium tracking-wide text-muted-foreground h-8 box-content"
+            class="group box-content flex h-8 w-full cursor-pointer items-center justify-between border-0 bg-transparent px-1 py-3 text-xs font-medium tracking-wide text-muted-foreground"
           >
             <span class="uppercase">{{ folder.label }}</span>
             <i