fix(ui): optimize UI Docker build and fix EMFILE on npm ci

[atripathy86]

npm install with ~1500 packages in a rootless container calls fchown() on every extracted file. Each EINVAL failure cascades into additional error-handler fd opens, exhausting the container's default nofile limit (1024 in buildah/runc) with EMFILE / exit 232.

• Replace 4 ad-hoc npm install RUN steps with a single npm ci
• Add --unsafe-perm to suppress fchown calls that fail in rootless builds
• Add --legacy-peer-deps, --no-audit, --no-fund to reduce fd and I/O pressure
• Use isolated cache path (--cache /tmp/.npm) to avoid cross-build contention
• Add NODE_OPTIONS=--max-old-space-size=4096 for webpack compilation headroom
• Move svg.js and d3 from Dockerfile installs into package.json dependencies
• Regenerate package-lock.json to include svg.js and d3 for npm ci validity

Related Issues / Pull Requests

#368

Description

Include a brief summary of the proposed changes.

What changes are proposed in this pull request?

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected; for instance,
  examples in this repository need to be updated too).
• This change requires a documentation update.

Checklist:

• My code follows the style guidelines of this project (PEP-8 with Google-style docstrings).
• My code modifies existing public API, or introduces new public API, and I updated or wrote docstrings that
  uses Google-style formatting and any other formatting that is supported by mkdocs and plugins this project
  uses.
• I have commented my code.
• My code requires documentation updates, and I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

[Copilot]

Pull request overview

This PR addresses UI container build failures (EMFILE / exit 232) in rootless Podman by making the UI dependency install more deterministic and less FD-intensive during image builds, and by moving ad-hoc Dockerfile installs into the UI’s normal dependency graph.

Changes:

• Consolidate UI image dependency installation into a single npm ci step with build-focused flags and a dedicated npm cache path.
• Add d3 and svg.js to ui/package.json and regenerate ui/package-lock.json to keep npm ci valid.
• Add NODE_OPTIONS=--max-old-space-size=4096 for webpack build headroom.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 3 comments.

File	Description
ui/package.json	Adds d3 and svg.js as declared dependencies so Docker builds can rely on npm ci rather than ad-hoc installs.
ui/package-lock.json	Regenerated lockfile to include the new dependencies and align installs with npm ci.
ui/Dockerfile	Replaces multiple npm install layers with a single npm ci invocation and adds Node memory options for build stability.

Files not reviewed (1)

• ui/package-lock.json: Generated file

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