Showcase-app(frontend): dependency upgrades and related fixes

[Ratheeshrajan]

Dependencies

• Upgraded react and react-dom 18.3 → 19.2.8
• Upgraded @carbon/react 1.53.0 → 1.113.0
• Upgraded @carbon/charts / @carbon/charts-react 1.15.3 → 1.27.18
• Upgraded react-toastify 9.0.8 → 11.1.0 (React 19 compatible)
• Upgraded react-router-dom 6.x → 7.18.2
• Removed unused dom-to-image-more dependency
• Zustand v3 → v5
• Upgraded react-flow-renderer → @xyflow/react v12 (changed components to reflect new API spec)

Carbon import fixes

• Replaced all @carbon/react/lib/ deep-path default imports with named imports from @carbon/react across 7 node files (FormLabel, TextInput, ProgressBar), deep paths removed in @carbon/react@1.113.0

@xyflow/react fixes

• Replaced with
  inside all blocks in both edge files — fixes React 19 hydration error
• Removed invalid connectionLineType and type props from SVG elements in both edge files
• Fixed stale defaultZoom → defaultViewport in PubSub/map.jsx and RequestResponse/map.jsx
• API renames: onEdgeUpdate → onReconnect, updateEdge → reconnectEdge, project() → screenToFlowPosition(), defaultPosition+defaultZoom → defaultViewport

Carbon Charts fix

• Added empty-data guard (if (!props.data?.length) return null) to all 3 chart components, prevents NaN SVG crash on initial render before data arrives

Accessibility / form IDs

• Added unique id props (scoped to node's id) to all 12 TextInput instances across 7 node files
• Added missing labelText where absent
• Replaced hardcoded duplicate id="tj-input" on 3 NumberInput elements with unique node-scoped IDs

Common

• Replaced Switch with Routes
• Added **/dist/, **/build/, **/.vite/ to root .gitignore
• Updated copyright year to 2022, 2026 on all 14 modified source files

BREAKING CHANGE: none - MQ messaging behaviour and API contracts unchanged.

[CLAassistant]

All committers have signed the CLA.

[ibmmqmet]

I tried running this locally, without AWS, and hit several problems with the docker-compose operations:

• Images should not be taken from Dockerhub (docker.io). That's banned within IBM.
  • Use alternative locations - quay.io where possible, public.ecr.aws is acceptable
• Node 20.9 as a base image is too old. Looks like 20.19 is minimum for current levels of packages
• Warnings
  • => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 22)
  • => WARN: StageNameCasing: Stage name 'backendImage' should be lowercase (line 81)
  • => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 81)
  • => WARN: FromPlatformFlagConstDisallowed: FROM --platform flag should not use constant value "linux/amd64" (line 22)
  • => WARN: FromPlatformFlagConstDisallowed: FROM --platform flag should not use constant value "linux/amd64" (line 81)
• The ibmmq dependency is very out of date
• Lots of node packages that are showing as deprecated
  • I ran docker-compose --file docker-compose.yaml build --no-cache to make sure it was building from scratch and errors could be seen
• frontend has a package-lock.json; should backend?

The actual code changes look reasonable, though I don't know React well-enough