feat: Reinitialize frontend with SvelteKit and TypeScript

- Delete old Vite+Svelte frontend
- Initialize new SvelteKit project with TypeScript
- Configure Tailwind CSS v4 + DaisyUI
- Implement JWT authentication with auto-refresh
- Create login page with form validation (Zod)
- Add protected route guards
- Update Docker configuration for single-stage build
- Add E2E tests with Playwright (6/11 passing)
- Fix Svelte 5 reactivity with $state() runes

Known issues:
- 5 E2E tests failing (timing/async issues)
- Token refresh implementation needs debugging
- Validation error display timing

frontend/node_modules/recharts/es6/util/payload/getUniqPayload.js

@@ -0,0 +1,20 @@
+import uniqBy from 'lodash/uniqBy';
+import isFunction from 'lodash/isFunction';
+
+/**
+ * This is configuration option that decides how to filter for unique values only:
+ *
+ * - `false` means "no filter"
+ * - `true` means "use recharts default filter"
+ * - function means "use return of this function as the default key"
+ */
+
+export function getUniqPayload(payload, option, defaultUniqBy) {
+  if (option === true) {
+    return uniqBy(payload, defaultUniqBy);
+  }
+  if (isFunction(option)) {
+    return uniqBy(payload, option);
+  }
+  return payload;
+}