Bump pixi.js from 8.17.1 to 8.18.1

Bumps [pixi.js](https://github.com/pixijs/pixijs) from 8.17.1 to 8.18.1.
- [Release notes](https://github.com/pixijs/pixijs/releases)
- [Commits](https://github.com/pixijs/pixijs/compare/v8.17.1...v8.18.1)

---
updated-dependencies:
- dependency-name: pixi.js
  dependency-version: 8.18.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -25,7 +25,7 @@
     "@coderline/alphatab": "^1.3.0",
     "@tonejs/midi": "^2.0.6",
     "mitt": "^3.0.1",
-    "pixi.js": "^8.0.0",
+    "pixi.js": "^8.18.1",
     "react": "^19.2.6",
     "react-dom": "^19.2.6",
     "smplr": "^0.14.0",

pnpm-lock.yaml

@@ -57,8 +57,8 @@ importers:
         specifier: ^3.0.1
         version: 3.0.1
       pixi.js:
-        specifier: ^8.0.0
-        version: 8.17.1
+        specifier: ^8.18.1
+        version: 8.18.1
       react:
         specifier: ^19.2.6
         version: 19.2.6
@@ -1166,8 +1166,8 @@ packages:
     resolution: {integrity: sha512-QP88BAKvMam/3NxH6vj2o21R6MjxZUAd6nlwAS/pnGvN9IVLocLHxGYIzFhg6fUQ+5th6P4dv4eW9jX3DSIj7A==}
     engines: {node: '>=12'}
 
-  pixi.js@8.17.1:
-    resolution: {integrity: sha512-OB4TpZHrP5RYy+7FqmFrAc0IHRhfOoNIfF4sVeinvK3aG1r2pYrSMneJAKi9+WvGKC70Dj7GEpZ2OZGB6o/xdg==}
+  pixi.js@8.18.1:
+    resolution: {integrity: sha512-6LUPWYgulZhp/w4kam2XHXB0QedISZIqrJbRdHLLQ3csn5a38uzKxAp6B5j6s89QFYaIJbg95kvgTRcbgpO1ow==}
 
   postcss@8.5.14:
     resolution: {integrity: sha512-SoSL4+OSEtR99LHFZQiJLkT59C5B1amGO1NzTwj7TT1qCUgUO6hxOvzkOYxD+vMrXBM3XJIKzokoERdqQq/Zmg==}
@@ -2536,7 +2536,7 @@ snapshots:
 
   picomatch@4.0.4: {}
 
-  pixi.js@8.17.1:
+  pixi.js@8.18.1:
     dependencies:
       '@pixi/colord': 2.9.6
       '@types/earcut': 3.0.0