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/autoprefixer/lib/hacks/inline-logical.js

@@ -0,0 +1,34 @@
+let Declaration = require('../declaration')
+
+class InlineLogical extends Declaration {
+  /**
+   * Return property name by spec
+   */
+  normalize(prop) {
+    return prop.replace(/(margin|padding|border)-(start|end)/, '$1-inline-$2')
+  }
+
+  /**
+   * Use old syntax for -moz- and -webkit-
+   */
+  prefixed(prop, prefix) {
+    return prefix + prop.replace('-inline', '')
+  }
+}
+
+InlineLogical.names = [
+  'border-inline-start',
+  'border-inline-end',
+  'margin-inline-start',
+  'margin-inline-end',
+  'padding-inline-start',
+  'padding-inline-end',
+  'border-start',
+  'border-end',
+  'margin-start',
+  'margin-end',
+  'padding-start',
+  'padding-end'
+]
+
+module.exports = InlineLogical