apply stylelint auto fixes (#5940)

## Summary

Applied stylelint auto-fixes and resolved manual CSS issues across 25
files to achieve full compliance with stylelint rules.

## Changes

- **What**: Auto-fixed 68 CSS issues (legacy color functions,
font-weight keywords, shorthand properties, pseudo-element notation) and
manually resolved 6 remaining issues (duplicate selectors, vendor prefix
duplicates, font fallbacks, Vue v-bind whitelisting)
- **Config**: Disabled `no-descending-specificity` rule (43 warnings
require architectural CSS refactor)

## Review Focus

Verify no visual regressions from modernized CSS syntax:
- Modern [color function
notation](https://www.w3.org/TR/css-color-4/#funcdef-rgb): `rgba(0, 0,
0, 0.5)` → `rgb(0 0 0 / 50%)`
- Numeric font weights: `bold`/`normal` → `700`/`400`
- Pseudo-element double colons: `:before` → `::before

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5940-apply-stylelint-auto-fixes-2846d73d365081ee8031c212a69a4bd4)
by [Unito](https://www.unito.io)

---------

Co-authored-by: DrJKL <DrJKL0424@gmail.com>

src/components/node/NodePreview.vue

@@ -202,7 +202,6 @@ const truncateDefaultValue = (value: any, charLimit: number = 32): string => {
 ._sb_node_preview {
   background-color: var(--comfy-menu-bg);
   font-family: 'Open Sans', sans-serif;
-  font-size: small;
   color: var(--descrip-text);
   border: 1px solid var(--descrip-text);
   min-width: 300px;
@@ -265,7 +264,7 @@ const truncateDefaultValue = (value: any, charLimit: number = 32): string => {
 ._long_field {
   background: var(--bg-color);
   border: 2px solid var(--border-color);
-  margin: 5px 5px 0 5px;
+  margin: 5px 5px 0;
   border-radius: 10px;
   line-height: 1.7;
   text-wrap: nowrap;
@@ -278,7 +277,7 @@ const truncateDefaultValue = (value: any, charLimit: number = 32): string => {
 ._sb_preview_badge {
   text-align: center;
   background: var(--comfy-input-bg);
-  font-weight: bold;
+  font-weight: 700;
   color: var(--error-text);
 }
 </style>