Upgrade to React 19

- react/react-dom: 18 → 19 (satisfies neural-activity-visualizer-react peer dep)
- plotly.js: 3.x → 2.35.3 (satisfies neural-activity-visualizer-react peer dep)
- @mui/material, @mui/icons-material: 5.16 → 5.18 (React 19 support)
- @types/react, @types/react-dom: 18 → 19
- @testing-library/react: 16.0 → 16.3.2 (React 19 peer dep support)
- Remove --legacy-peer-deps from Dockerfile and .gitlab-ci.yml

Author: apdavison

.gitlab-ci.yml

@@ -6,7 +6,7 @@ test_app:
   stage: test
   script:
     - cd apps/nar-v3
-    - npm ci --legacy-peer-deps
+    - npm ci
     - npm run testci  # runs all tests whose name does _not_ contain "KG"
   tags:
     - docker-runner

apps/nar-v3/deployment/Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /app
 ENV PATH /app/node_modules/.bin:$PATH
 COPY package.json ./
 COPY package-lock.json ./
-RUN npm ci --silent --legacy-peer-deps
+RUN npm ci --silent
 COPY . ./
 RUN npm run build