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/sveltekit-superforms/dist/adapters/valibot.d.ts

@@ -0,0 +1,15 @@
+import { type ValidationAdapter, type AdapterOptions, type Infer, type InferIn, type ClientValidationAdapter } from './adapters.js';
+import { type GenericSchema, type GenericSchemaAsync, type Config, type GenericIssue } from 'valibot';
+import { type ConversionConfig } from '@valibot/to-json-schema';
+import type { JSONSchema } from '../jsonSchema/index.js';
+type SupportedSchemas = GenericSchema | GenericSchemaAsync;
+export declare const valibotToJSONSchema: (options: ConversionConfig & {
+    schema: SupportedSchemas;
+}) => JSONSchema;
+export declare const valibot: <T extends SupportedSchemas>(schema: T, options?: (Omit<ConversionConfig, "schema"> & AdapterOptions<Infer<T, "valibot">> & {
+    config?: Config<GenericIssue<unknown>>;
+}) | undefined) => ValidationAdapter<Infer<T, "valibot">, InferIn<T, "valibot">>;
+export declare const valibotClient: <T extends SupportedSchemas>(schema: T, options?: (Omit<ConversionConfig, "schema"> & AdapterOptions<Infer<T, "valibot">> & {
+    config?: Config<GenericIssue<unknown>>;
+}) | undefined) => ClientValidationAdapter<Infer<T, "valibot">, InferIn<T, "valibot">>;
+export {};