fix: enable no-deprecated-classes tailwind lint rule (#9417)

## Summary

Enable `better-tailwindcss/no-deprecated-classes` lint rule and auto-fix
all 103 violations across 65 files. First PR in a stacked series for
#9300.

## Changes

- **What**: Replace deprecated Tailwind v3 classes with v4 equivalents:
  - `rounded` → `rounded-sm` (85)
  - `flex-shrink-0` → `shrink-0` (16)
  - `flex-grow` → `grow` (2)
- Enable `no-deprecated-classes` as `'error'` in eslint config
- Update one test asserting on `'rounded'` class string

## Review Focus

Mechanical auto-fix PR — all changes produced by `eslint --fix`. No
visual or behavioral changes (Tailwind v4 aliases these classes
identically).

Fixes #9300 (partial — 1 of 3 rules)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9417-fix-enable-no-deprecated-classes-tailwind-lint-rule-31a6d73d3650819eaef4cf8ad84fb186)
by [Unito](https://www.unito.io)

Co-authored-by: Alexander Brown <drjkl@comfy.org>

src/renderer/extensions/vueNodes/widgets/components/audio/AudioPreviewPlayer.vue

@@ -20,7 +20,7 @@
           variant="textonly"
           size="unset"
           :aria-label="$t('g.playPause')"
-          class="size-6 rounded"
+          class="size-6 rounded-sm"
           @click="togglePlayPause"
         >
           <i
@@ -61,7 +61,7 @@
           variant="textonly"
           size="unset"
           :aria-label="$t('g.volume')"
-          class="size-6 rounded"
+          class="size-6 rounded-sm"
           @click="toggleMute"
         >
           <i
@@ -94,7 +94,7 @@
           variant="textonly"
           size="unset"
           :aria-label="$t('g.moreOptions')"
-          class="size-6 rounded"
+          class="size-6 rounded-sm"
           @click="toggleOptionsMenu"
         >
           <i class="text-secondary icon-[lucide--more-vertical] size-4" />