chore(deps): upgrade eslint to v10 and fix lint errors

[DerekRoberts]

This PR replaces #608. It upgrades eslint and @eslint/js to v10, configures proper ESLint ignores for Cypress and build config files, and fixes existing lint errors (including a missing toast import in EditForm.jsx).

Supercedes #608

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Pull request overview

This PR upgrades the frontend linting toolchain to ESLint v10, updates the flat ESLint config ignore patterns, and applies small code cleanups to satisfy the new lint rules (including fixing a missing toast import).

Changes:

• Bump eslint and @eslint/js to v10 (plus lockfile refresh) and add an overrides entry for eslint-plugin-react.
• Update frontend/eslint.config.js ignores to exclude build output and Cypress/config files.
• Fix/clean up frontend component lint issues (unused React imports, hook deps, and missing toast import).

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
frontend/src/components/NotFound.jsx	Removes unused React import and fixes unescaped apostrophe in JSX text.
frontend/src/components/LeftDrawer.jsx	Removes unused icon and useState imports.
frontend/src/components/FormComponent.jsx	Removes unused React default import/unused state setter and adjusts useEffect deps.
frontend/src/components/EditForm.jsx	Removes unused React imports/state setter and adds missing toast import.
frontend/package.json	Upgrades ESLint deps to v10 and adds an override to align peer dependency resolution.
frontend/package-lock.json	Updates lockfile for ESLint v10 dependency tree.
frontend/eslint.config.js	Expands ignore globs for dist/Cypress/config files.
frontend/env.js	Removes now-unnecessary eslint-disable comment.

Files not reviewed (1)

• frontend/package-lock.json: Generated file