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/happy-dom/lib/dom-implementation/DOMImplementation.d.ts

@@ -0,0 +1,37 @@
+import DocumentType from '../nodes/document-type/DocumentType.js';
+import Document from '../nodes/document/Document.js';
+/**
+ * The DOMImplementation interface represents an object providing methods which are not dependent on any particular document. Such an object is returned by the.
+ */
+export default class DOMImplementation {
+    #private;
+    /**
+     * Constructor.
+     *
+     * @param document Document.
+     */
+    constructor(document: Document);
+    /**
+     * Creates and returns an XML Document.
+     *
+     * TODO: Not fully implemented.
+     *
+     * @param _namespaceURI Namespace URI.
+     * @param _qualifiedName Qualified name.
+     * @param [_docType] Document type.
+     */
+    createDocument(_namespaceURI: string, _qualifiedName: string, _docType?: string): Document;
+    /**
+     * Creates and returns an HTML Document.
+     */
+    createHTMLDocument(): Document;
+    /**
+     * Creates and returns an HTML Document.
+     *
+     * @param qualifiedName Qualified name.
+     * @param publicId Public ID.
+     * @param systemId System ID.
+     */
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+}
+//# sourceMappingURL=DOMImplementation.d.ts.map

frontend/node_modules/happy-dom/lib/dom-implementation/DOMImplementation.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"DOMImplementation.d.ts","sourceRoot":"","sources":["../../src/dom-implementation/DOMImplementation.ts"],"names":[],"mappings":"AAAA,OAAO,YAAY,MAAM,wCAAwC,CAAC;AAElE,OAAO,QAAQ,MAAM,+BAA+B,CAAC;AAGrD;;GAEG;AACH,MAAM,CAAC,OAAO,OAAO,iBAAiB;;IAGrC;;;;OAIG;gBACS,QAAQ,EAAE,QAAQ;IAI9B;;;;;;;;OAQG;IACI,cAAc,CACpB,aAAa,EAAE,MAAM,EACrB,cAAc,EAAE,MAAM,EACtB,QAAQ,CAAC,EAAE,MAAM,GACf,QAAQ;IAIX;;OAEG;IACI,kBAAkB,IAAI,QAAQ;IAIrC;;;;;;OAMG;IACI,kBAAkB,CACxB,aAAa,EAAE,MAAM,EACrB,QAAQ,EAAE,MAAM,EAChB,QAAQ,EAAE,MAAM,GACd,YAAY;CASf"}

frontend/node_modules/happy-dom/lib/dom-implementation/DOMImplementation.js

@@ -0,0 +1,50 @@
+import DocumentType from '../nodes/document-type/DocumentType.js';
+import * as PropertySymbol from '../PropertySymbol.js';
+import NodeFactory from '../nodes/NodeFactory.js';
+/**
+ * The DOMImplementation interface represents an object providing methods which are not dependent on any particular document. Such an object is returned by the.
+ */
+export default class DOMImplementation {
+    #document;
+    /**
+     * Constructor.
+     *
+     * @param document Document.
+     */
+    constructor(document) {
+        this.#document = document;
+    }
+    /**
+     * Creates and returns an XML Document.
+     *
+     * TODO: Not fully implemented.
+     *
+     * @param _namespaceURI Namespace URI.
+     * @param _qualifiedName Qualified name.
+     * @param [_docType] Document type.
+     */
+    createDocument(_namespaceURI, _qualifiedName, _docType) {
+        return new this.#document[PropertySymbol.window].HTMLDocument();
+    }
+    /**
+     * Creates and returns an HTML Document.
+     */
+    createHTMLDocument() {
+        return new this.#document[PropertySymbol.window].HTMLDocument();
+    }
+    /**
+     * Creates and returns an HTML Document.
+     *
+     * @param qualifiedName Qualified name.
+     * @param publicId Public ID.
+     * @param systemId System ID.
+     */
+    createDocumentType(qualifiedName, publicId, systemId) {
+        const documentType = NodeFactory.createNode(this.#document, DocumentType);
+        documentType[PropertySymbol.name] = qualifiedName;
+        documentType[PropertySymbol.publicId] = publicId;
+        documentType[PropertySymbol.systemId] = systemId;
+        return documentType;
+    }
+}
+//# sourceMappingURL=DOMImplementation.js.map

frontend/node_modules/happy-dom/lib/dom-implementation/DOMImplementation.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"DOMImplementation.js","sourceRoot":"","sources":["../../src/dom-implementation/DOMImplementation.ts"],"names":[],"mappings":"AAAA,OAAO,YAAY,MAAM,wCAAwC,CAAC;AAClE,OAAO,KAAK,cAAc,MAAM,sBAAsB,CAAC;AAEvD,OAAO,WAAW,MAAM,yBAAyB,CAAC;AAElD;;GAEG;AACH,MAAM,CAAC,OAAO,OAAO,iBAAiB;IACrC,SAAS,CAAW;IAEpB;;;;OAIG;IACH,YAAY,QAAkB;QAC7B,IAAI,CAAC,SAAS,GAAG,QAAQ,CAAC;IAC3B,CAAC;IAED;;;;;;;;OAQG;IACI,cAAc,CACpB,aAAqB,EACrB,cAAsB,EACtB,QAAiB;QAEjB,OAAO,IAAI,IAAI,CAAC,SAAS,CAAC,cAAc,CAAC,MAAM,CAAC,CAAC,YAAY,EAAE,CAAC;IACjE,CAAC;IAED;;OAEG;IACI,kBAAkB;QACxB,OAAO,IAAI,IAAI,CAAC,SAAS,CAAC,cAAc,CAAC,MAAM,CAAC,CAAC,YAAY,EAAE,CAAC;IACjE,CAAC;IAED;;;;;;OAMG;IACI,kBAAkB,CACxB,aAAqB,EACrB,QAAgB,EAChB,QAAgB;QAEhB,MAAM,YAAY,GAAG,WAAW,CAAC,UAAU,CAAe,IAAI,CAAC,SAAS,EAAE,YAAY,CAAC,CAAC;QAExF,YAAY,CAAC,cAAc,CAAC,IAAI,CAAC,GAAG,aAAa,CAAC;QAClD,YAAY,CAAC,cAAc,CAAC,QAAQ,CAAC,GAAG,QAAQ,CAAC;QACjD,YAAY,CAAC,cAAc,CAAC,QAAQ,CAAC,GAAG,QAAQ,CAAC;QAEjD,OAAO,YAAY,CAAC;IACrB,CAAC;CACD"}