Update css (#32552)

* Update css

* Patch weak types in postcss-mixins

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

apps/web/@types/postcss-mixins.d.ts

@@ -1,10 +0,0 @@
-/*
-Copyright 2026 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE files in the repository root for full details.
-*/
-
-declare module "postcss-mixins" {
-    export default function (): void;
-}

apps/web/package.json

@@ -203,17 +203,17 @@
         "jest-raw-loader": "^1.0.1",
         "jsqr": "^1.4.0",
         "matrix-web-i18n": "catalog:",
-        "mini-css-extract-plugin": "2.10.0",
+        "mini-css-extract-plugin": "2.10.1",
         "modernizr": "^3.12.0",
         "playwright-core": "catalog:",
-        "postcss": "8.5.6",
+        "postcss": "8.5.8",
         "postcss-easings": "4.0.0",
         "postcss-hexrgba": "2.1.0",
         "postcss-import": "16.1.1",
-        "postcss-loader": "8.2.0",
-        "postcss-mixins": "12.0.0",
+        "postcss-loader": "8.2.1",
+        "postcss-mixins": "12.1.2",
         "postcss-nested": "7.0.2",
-        "postcss-preset-env": "11.1.1",
+        "postcss-preset-env": "11.2.0",
         "postcss-scss": "4.0.9",
         "postcss-simple-vars": "7.0.1",
         "prettier": "3.8.1",

package.json

@@ -72,7 +72,8 @@
             "jest-fixed-jsdom": "patches/jest-fixed-jsdom.patch",
             "jsdom": "patches/jsdom.patch",
             "rollup": "patches/rollup.patch",
-            "knip": "patches/knip.patch"
+            "knip": "patches/knip.patch",
+            "postcss-mixins": "patches/postcss-mixins.patch"
         },
         "peerDependencyRules": {
             "allowedVersions": {

patches/postcss-mixins.patch

@@ -0,0 +1,13 @@
+diff --git a/index.d.ts b/index.d.ts
+index 5b070312004db8492f02db50bf99f5057ce793eb..a9f642c723e59cb662810ef9d8e9f14664f58bb7 100644
+--- a/index.d.ts
++++ b/index.d.ts
+@@ -5,7 +5,7 @@ declare interface MixinOutput {
+ }
+ 
+ declare interface Mixin {
+-  (mixinAtRule: AtRule, ...args: string[])
++  (mixinAtRule: AtRule, ...args: string[]): void
+ }
+ 
+ declare type Mixins = Record<string, MixinOutput | Mixin>