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/dom-helpers/cjs/matches.js

@@ -0,0 +1,26 @@
+"use strict";
+
+exports.__esModule = true;
+exports.default = matches;
+var matchesImpl;
+/**
+ * Checks if a given element matches a selector.
+ * 
+ * @param node the element
+ * @param selector the selector
+ */
+
+function matches(node, selector) {
+  if (!matchesImpl) {
+    var body = document.body;
+    var nativeMatch = body.matches || body.matchesSelector || body.webkitMatchesSelector || body.mozMatchesSelector || body.msMatchesSelector;
+
+    matchesImpl = function matchesImpl(n, s) {
+      return nativeMatch.call(n, s);
+    };
+  }
+
+  return matchesImpl(node, selector);
+}
+
+module.exports = exports["default"];