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/effect/dist/dts/NonEmptyIterable.d.ts

@@ -0,0 +1,21 @@
+/**
+ * @since 2.0.0
+ */
+/**
+ * @category symbol
+ * @since 2.0.0
+ */
+export declare const nonEmpty: unique symbol;
+/**
+ * @category model
+ * @since 2.0.0
+ */
+export interface NonEmptyIterable<out A> extends Iterable<A> {
+    readonly [nonEmpty]: A;
+}
+/**
+ * @category getters
+ * @since 2.0.0
+ */
+export declare const unprepend: <A>(self: NonEmptyIterable<A>) => [firstElement: A, remainingElements: Iterator<A>];
+//# sourceMappingURL=NonEmptyIterable.d.ts.map