104 fix minimatch dependency vulnerabilities

[krgjert]

Purpose

Resolve the minimatch denial-of-service vulnerability in frontend and backend development dependencies.

Changes

• Add minimatch overrides in both package.json files.
• Update both lockfiles to resolve minimatch to 11.0.8.
• Fix import casing in App.tsx and BuildProvider.tsx to restore the frontend build.

Related issues

None.

Verification

• Confirmed both lockfiles resolve minimatch to 11.0.8.
• Backend: build and lint passed; npm audit no longer reports minimatch.
• Frontend: build and lint passed; all 12 tests passed.
• Frontend tests emit existing duplicate React key warnings.
• Backend tests are not configured.
• Backend audit still reports separate body-parser and qs vulnerabilities.
• Closure of both Dependabot alerts must be confirmed after merging.

Checklist

• I have reviewed my own changes.
• The changes meet the linked issue's acceptance criteria, where applicable.
• I have verified the changes and recorded the results above.
• I have added or updated tests where needed.
• I have updated documentation where needed.
• I have included screenshots for visual changes, or marked them not applicable.