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/dom-accessibility-api/dist/accessible-name-and-description.d.ts

@@ -0,0 +1,29 @@
+/**
+ * interface for an options-bag where `window.getComputedStyle` can be mocked
+ */
+export interface ComputeTextAlternativeOptions {
+    compute?: "description" | "name";
+    /**
+     * Set to true if window.computedStyle supports the second argument.
+     * This should be false in JSDOM. Otherwise JSDOM will log console errors.
+     */
+    computedStyleSupportsPseudoElements?: boolean;
+    /**
+     * mock window.getComputedStyle. Needs `content`, `display` and `visibility`
+     */
+    getComputedStyle?: typeof window.getComputedStyle;
+    /**
+     * Set to `true` if you want to include hidden elements in the accessible name and description computation.
+     * Skips 2A in https://w3c.github.io/accname/#computation-steps.
+     * @default false
+     */
+    hidden?: boolean;
+}
+/**
+ * implements https://w3c.github.io/accname/#mapping_additional_nd_te
+ * @param root
+ * @param options
+ * @returns
+ */
+export declare function computeTextAlternative(root: Element, options?: ComputeTextAlternativeOptions): string;
+//# sourceMappingURL=accessible-name-and-description.d.ts.map