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/components/bottomPanel/tabs/shortcuts/ShortcutsList.vue

@@ -19,7 +19,7 @@
           <div
             v-for="command in subcategoryCommands"
             :key="command.id"
-            class="shortcut-item flex items-center justify-between rounded py-2 transition-colors duration-200"
+            class="shortcut-item flex items-center justify-between rounded-sm py-2 transition-colors duration-200"
           >
             <div class="shortcut-info grow pr-4">
               <div class="shortcut-name text-sm font-medium">
@@ -35,7 +35,7 @@
                 <span
                   v-for="key in command.keybinding!.combo.getKeySequences()"
                   :key="key"
-                  class="key-badge min-w-6 rounded bg-muted-background px-2 py-1 text-center font-mono text-xs"
+                  class="key-badge min-w-6 rounded-sm bg-muted-background px-2 py-1 text-center font-mono text-xs"
                 >
                   {{ formatKey(key) }}
                 </span>