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/.svelte-kit/types/route_meta_data.json

@@ -0,0 +1,10 @@
+{
+	"/": [],
+	"/dashboard": [
+		"src/routes/dashboard/+layout.ts",
+		"src/routes/dashboard/+layout.ts"
+	],
+	"/login": [
+		"src/routes/login/+page.ts"
+	]
+}

frontend/.svelte-kit/types/src/routes/$types.d.ts

@@ -0,0 +1,24 @@
+import type * as Kit from '@sveltejs/kit';
+
+type Expand<T> = T extends infer O ? { [K in keyof O]: O[K] } : never;
+// @ts-ignore
+type MatcherParam<M> = M extends (param : string) => param is infer U ? U extends string ? U : string : string;
+type RouteParams = {  };
+type RouteId = '/';
+type MaybeWithVoid<T> = {} extends T ? T | void : T;
+export type RequiredKeys<T> = { [K in keyof T]-?: {} extends { [P in K]: T[K] } ? never : K; }[keyof T];
+type OutputDataShape<T> = MaybeWithVoid<Omit<App.PageData, RequiredKeys<T>> & Partial<Pick<App.PageData, keyof T & keyof App.PageData>> & Record<string, any>>
+type EnsureDefined<T> = T extends null | undefined ? {} : T;
+type OptionalUnion<U extends Record<string, any>, A extends keyof U = U extends U ? keyof U : never> = U extends unknown ? { [P in Exclude<A, keyof U>]?: never } & U : never;
+export type Snapshot<T = any> = Kit.Snapshot<T>;
+type PageParentData = EnsureDefined<LayoutData>;
+type LayoutRouteId = RouteId | "/" | "/dashboard" | "/login" | null
+type LayoutParams = RouteParams & {  }
+type LayoutParentData = EnsureDefined<{}>;
+
+export type PageServerData = null;
+export type PageData = Expand<PageParentData>;
+export type PageProps = { params: RouteParams; data: PageData }
+export type LayoutServerData = null;
+export type LayoutData = Expand<LayoutParentData>;
+export type LayoutProps = { params: LayoutParams; data: LayoutData; children: import("svelte").Snippet }

frontend/.svelte-kit/types/src/routes/dashboard/$types.d.ts

@@ -0,0 +1,26 @@
+import type * as Kit from '@sveltejs/kit';
+
+type Expand<T> = T extends infer O ? { [K in keyof O]: O[K] } : never;
+// @ts-ignore
+type MatcherParam<M> = M extends (param : string) => param is infer U ? U extends string ? U : string : string;
+type RouteParams = {  };
+type RouteId = '/dashboard';
+type MaybeWithVoid<T> = {} extends T ? T | void : T;
+export type RequiredKeys<T> = { [K in keyof T]-?: {} extends { [P in K]: T[K] } ? never : K; }[keyof T];
+type OutputDataShape<T> = MaybeWithVoid<Omit<App.PageData, RequiredKeys<T>> & Partial<Pick<App.PageData, keyof T & keyof App.PageData>> & Record<string, any>>
+type EnsureDefined<T> = T extends null | undefined ? {} : T;
+type OptionalUnion<U extends Record<string, any>, A extends keyof U = U extends U ? keyof U : never> = U extends unknown ? { [P in Exclude<A, keyof U>]?: never } & U : never;
+export type Snapshot<T = any> = Kit.Snapshot<T>;
+type PageParentData = Omit<EnsureDefined<import('../$types.js').LayoutData>, keyof LayoutData> & EnsureDefined<LayoutData>;
+type LayoutRouteId = RouteId | "/dashboard"
+type LayoutParams = RouteParams & {  }
+type LayoutParentData = EnsureDefined<import('../$types.js').LayoutData>;
+
+export type PageServerData = null;
+export type PageData = Expand<PageParentData>;
+export type PageProps = { params: RouteParams; data: PageData }
+export type LayoutServerData = null;
+export type LayoutLoad<OutputData extends OutputDataShape<LayoutParentData> = OutputDataShape<LayoutParentData>> = Kit.Load<LayoutParams, LayoutServerData, LayoutParentData, OutputData, LayoutRouteId>;
+export type LayoutLoadEvent = Parameters<LayoutLoad>[0];
+export type LayoutData = Expand<Omit<LayoutParentData, keyof Kit.LoadProperties<Awaited<ReturnType<typeof import('./proxy+layout.js').load>>>> & OptionalUnion<EnsureDefined<Kit.LoadProperties<Awaited<ReturnType<typeof import('./proxy+layout.js').load>>>>>>;
+export type LayoutProps = { params: LayoutParams; data: LayoutData; children: import("svelte").Snippet }

frontend/.svelte-kit/types/src/routes/dashboard/proxy+layout.ts

@@ -0,0 +1,24 @@
+// @ts-nocheck
+import { browser } from '$app/environment';
+import { goto } from '$app/navigation';
+import { isAuthenticated } from '$lib/stores/auth';
+import type { LayoutLoad } from './$types';
+
+export const load = async () => {
+  // Check authentication on client side
+  if (browser) {
+    let authenticated = false;
+    const unsubscribe = isAuthenticated.subscribe((value) => {
+      authenticated = value;
+    });
+    unsubscribe();
+
+    if (!authenticated) {
+      goto('/login');
+      return { authenticated: false };
+    }
+  }
+
+  return { authenticated: true };
+};
+;null as any as LayoutLoad;

frontend/.svelte-kit/types/src/routes/login/$types.d.ts

@@ -0,0 +1,20 @@
+import type * as Kit from '@sveltejs/kit';
+
+type Expand<T> = T extends infer O ? { [K in keyof O]: O[K] } : never;
+// @ts-ignore
+type MatcherParam<M> = M extends (param : string) => param is infer U ? U extends string ? U : string : string;
+type RouteParams = {  };
+type RouteId = '/login';
+type MaybeWithVoid<T> = {} extends T ? T | void : T;
+export type RequiredKeys<T> = { [K in keyof T]-?: {} extends { [P in K]: T[K] } ? never : K; }[keyof T];
+type OutputDataShape<T> = MaybeWithVoid<Omit<App.PageData, RequiredKeys<T>> & Partial<Pick<App.PageData, keyof T & keyof App.PageData>> & Record<string, any>>
+type EnsureDefined<T> = T extends null | undefined ? {} : T;
+type OptionalUnion<U extends Record<string, any>, A extends keyof U = U extends U ? keyof U : never> = U extends unknown ? { [P in Exclude<A, keyof U>]?: never } & U : never;
+export type Snapshot<T = any> = Kit.Snapshot<T>;
+type PageParentData = EnsureDefined<import('../$types.js').LayoutData>;
+
+export type PageServerData = null;
+export type PageLoad<OutputData extends OutputDataShape<PageParentData> = OutputDataShape<PageParentData>> = Kit.Load<RouteParams, PageServerData, PageParentData, OutputData, RouteId>;
+export type PageLoadEvent = Parameters<PageLoad>[0];
+export type PageData = Expand<Omit<PageParentData, keyof PageParentData & EnsureDefined<PageServerData>> & OptionalUnion<EnsureDefined<PageParentData & EnsureDefined<PageServerData>>>>;
+export type PageProps = { params: RouteParams; data: PageData }