feat(frontend): add API client, layout, and routing

- Create Axios-based API client with sources, jobs, and dashboard endpoints
- Add responsive Layout component with navigation sidebar
- Set up React Router with Dashboard, Backups, and Settings routes
- Configure TanStack Query provider with default options
- Use lucide-react for navigation icons

frontend/node_modules/css-tree/lib/syntax/node/index-parse.js

@@ -0,0 +1,41 @@
+export { parse as AnPlusB } from './AnPlusB.js';
+export { parse as Atrule } from './Atrule.js';
+export { parse as AtrulePrelude } from './AtrulePrelude.js';
+export { parse as AttributeSelector } from './AttributeSelector.js';
+export { parse as Block } from './Block.js';
+export { parse as Brackets } from './Brackets.js';
+export { parse as CDC } from './CDC.js';
+export { parse as CDO } from './CDO.js';
+export { parse as ClassSelector } from './ClassSelector.js';
+export { parse as Combinator } from './Combinator.js';
+export { parse as Comment } from './Comment.js';
+export { parse as Declaration } from './Declaration.js';
+export { parse as DeclarationList } from './DeclarationList.js';
+export { parse as Dimension } from './Dimension.js';
+export { parse as Function } from './Function.js';
+export { parse as Hash } from './Hash.js';
+export { parse as Identifier } from './Identifier.js';
+export { parse as IdSelector } from './IdSelector.js';
+export { parse as MediaFeature } from './MediaFeature.js';
+export { parse as MediaQuery } from './MediaQuery.js';
+export { parse as MediaQueryList } from './MediaQueryList.js';
+export { parse as NestingSelector } from './NestingSelector.js';
+export { parse as Nth } from './Nth.js';
+export { parse as Number } from './Number.js';
+export { parse as Operator } from './Operator.js';
+export { parse as Parentheses } from './Parentheses.js';
+export { parse as Percentage } from './Percentage.js';
+export { parse as PseudoClassSelector } from './PseudoClassSelector.js';
+export { parse as PseudoElementSelector } from './PseudoElementSelector.js';
+export { parse as Ratio } from './Ratio.js';
+export { parse as Raw } from './Raw.js';
+export { parse as Rule } from './Rule.js';
+export { parse as Selector } from './Selector.js';
+export { parse as SelectorList } from './SelectorList.js';
+export { parse as String } from './String.js';
+export { parse as StyleSheet } from './StyleSheet.js';
+export { parse as TypeSelector } from './TypeSelector.js';
+export { parse as UnicodeRange } from './UnicodeRange.js';
+export { parse as Url } from './Url.js';
+export { parse as Value } from './Value.js';
+export { parse as WhiteSpace } from './WhiteSpace.js';