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/fast-check/lib/arbitrary/_internals/AlwaysShrinkableArbitrary.js

@@ -0,0 +1,27 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.AlwaysShrinkableArbitrary = void 0;
+const Arbitrary_1 = require("../../check/arbitrary/definition/Arbitrary");
+const Stream_1 = require("../../stream/Stream");
+const NoUndefinedAsContext_1 = require("./helpers/NoUndefinedAsContext");
+class AlwaysShrinkableArbitrary extends Arbitrary_1.Arbitrary {
+    constructor(arb) {
+        super();
+        this.arb = arb;
+    }
+    generate(mrng, biasFactor) {
+        const value = this.arb.generate(mrng, biasFactor);
+        return (0, NoUndefinedAsContext_1.noUndefinedAsContext)(value);
+    }
+    canShrinkWithoutContext(value) {
+        return true;
+    }
+    shrink(value, context) {
+        if (context === undefined && !this.arb.canShrinkWithoutContext(value)) {
+            return Stream_1.Stream.nil();
+        }
+        const safeContext = context !== NoUndefinedAsContext_1.UndefinedContextPlaceholder ? context : undefined;
+        return this.arb.shrink(value, safeContext).map(NoUndefinedAsContext_1.noUndefinedAsContext);
+    }
+}
+exports.AlwaysShrinkableArbitrary = AlwaysShrinkableArbitrary;