Update from Copier (2026-09-13T10-11-09Z) (#202)

* Update from Copier (2026-09-13T10-11-09Z)

Signed-off-by: python-templates-copier-update[bot] <python-templates-copier-update[bot]@users.noreply.github.com>

* update lock

---------

Signed-off-by: python-templates-copier-update[bot] <python-templates-copier-update[bot]@users.noreply.github.com>
Co-authored-by: python-templates-copier-update[bot] <python-templates-copier-update[bot]@users.noreply.github.com>
Co-authored-by: Tim Paine <3105306+timkpaine@users.noreply.github.com>

Author: python-templates-copier-update[bot]

.copier-answers.yaml

@@ -1,5 +1,5 @@
 # Changes here will be overwritten by Copier
-_commit: 552b2de
+_commit: 5939e98
 _src_path: https://github.com/python-project-templates/base.git
 add_docs: true
 add_extension: jupyter

js/package.json

@@ -33,7 +33,7 @@
     "build:babel": "babel src/ --source-maps --out-dir lib/",
     "build:extension": "mkdirp ../python_template_jupyter/extension/ && cpy --flat 'src/extension/*' '../python_template_jupyter/extension/'",
     "build:nbextension": "mkdirp ../python_template_jupyter/nbextension/static/ && cpy --flat 'src/notebook.js' '../python_template_jupyter/nbextension/static/'",
-    "build:labextension": "rimraf ../python_template_jupyter/labextension && jupyter labextension build .",
+    "build:labextension": "rimraf ../python_template_jupyter/labextension && jupyter-builder build .",
     "build": "pnpm clean && pnpm build:babel && pnpm build:extension && pnpm build:labextension && pnpm build:nbextension",
     "clean": "rimraf lib",
     "fix": "oxlint --fix src/ tests/ && oxfmt --write \"src/**/*.js\" \"tests/**/*.js\"",
@@ -53,9 +53,11 @@
     "@babel/cli": "^8.0.4",
     "@babel/core": "^8.0.1",
     "@babel/preset-env": "^8.0.2",
-    "@jupyterlab/builder": "^4.5.10",
+    "@jupyter/builder": "^1.2.3",
+    "@jupyterlab/core-meta": "^4.6.3",
     "babel-jest": "^30.5.1",
     "cpy-cli": "^7.0.0",
+    "css-loader": "^7.1.4",
     "isomorphic-fetch": "^3.0.0",
     "jest": "^30.5.1",
     "jest-environment-jsdom": "^30.5.1",
@@ -64,6 +66,7 @@
     "mkdirp": "^3.0.1",
     "oxfmt": "^0.66.0",
     "oxlint": "^1.81.0",
-    "rimraf": "^6.1.3"
+    "rimraf": "^6.1.3",
+    "style-loader": "^4.0.0"
   }
 }