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/eslint-plugin-svelte/lib/configs/flat/all.d.ts

@@ -0,0 +1,3 @@
+import type { Linter } from 'eslint';
+declare const config: Linter.Config[];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/all.js

@@ -0,0 +1,15 @@
+import { rules } from '../../utils/rules.js';
+import base from './base.js';
+const config = [
+    ...base,
+    {
+        name: 'svelte:all:rules',
+        rules: Object.fromEntries(rules
+            .map((rule) => [`svelte/${rule.meta.docs.ruleName}`, 'error'])
+            .filter(([ruleName]) => ![
+            // Does not work without options.
+            'svelte/no-restricted-html-elements'
+        ].includes(ruleName)))
+    }
+];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/base.d.ts

@@ -0,0 +1,4 @@
+import type { ESLint, Linter } from 'eslint';
+export declare function setPluginObject(plugin: ESLint.Plugin): void;
+declare const config: Linter.Config[];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/base.js

@@ -0,0 +1,44 @@
+import * as parser from 'svelte-eslint-parser';
+let pluginObject = null;
+export function setPluginObject(plugin) {
+    pluginObject = plugin;
+}
+const config = [
+    {
+        name: 'svelte:base:setup-plugin',
+        plugins: {
+            get svelte() {
+                return pluginObject;
+            }
+        }
+    },
+    {
+        name: 'svelte:base:setup-for-svelte',
+        files: ['*.svelte', '**/*.svelte'],
+        languageOptions: {
+            parser
+        },
+        rules: {
+            // ESLint core rules known to cause problems with `.svelte`.
+            'no-inner-declarations': 'off', // The AST generated by svelte-eslint-parser will false positives in it rule because the root node of the script is not the `Program`.
+            // "no-irregular-whitespace": "off",
+            // Self assign is one of way to update reactive value in Svelte.
+            'no-self-assign': 'off',
+            // eslint-plugin-svelte rules
+            'svelte/comment-directive': 'error',
+            'svelte/system': 'error'
+        },
+        processor: 'svelte/svelte'
+    },
+    {
+        name: 'svelte:base:setup-for-svelte-script',
+        files: ['*.svelte.js', '*.svelte.ts', '**/*.svelte.js', '**/*.svelte.ts'],
+        languageOptions: {
+            parser
+        },
+        rules: {
+        // eslint-plugin-svelte rules
+        }
+    }
+];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/prettier.d.ts

@@ -0,0 +1,3 @@
+import type { Linter } from 'eslint';
+declare const config: Linter.Config[];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/prettier.js

@@ -0,0 +1,23 @@
+import base from './base.js';
+const config = [
+    ...base,
+    {
+        name: 'svelte:prettier:turn-off-rules',
+        rules: {
+            // eslint-plugin-svelte rules
+            'svelte/first-attribute-linebreak': 'off',
+            'svelte/html-closing-bracket-new-line': 'off',
+            'svelte/html-closing-bracket-spacing': 'off',
+            'svelte/html-quotes': 'off',
+            'svelte/html-self-closing': 'off',
+            'svelte/indent': 'off',
+            'svelte/max-attributes-per-line': 'off',
+            'svelte/mustache-spacing': 'off',
+            'svelte/no-spaces-around-equal-signs-in-attribute': 'off',
+            'svelte/no-trailing-spaces': 'off',
+            'svelte/shorthand-attribute': 'off',
+            'svelte/shorthand-directive': 'off'
+        }
+    }
+];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/recommended.d.ts

@@ -0,0 +1,3 @@
+import type { Linter } from 'eslint';
+declare const config: Linter.Config[];
+export default config;

frontend/node_modules/eslint-plugin-svelte/lib/configs/flat/recommended.js

@@ -0,0 +1,48 @@
+import base from './base.js';
+const config = [
+    ...base,
+    {
+        name: 'svelte:recommended:rules',
+        rules: {
+            // eslint-plugin-svelte rules
+            'svelte/comment-directive': 'error',
+            'svelte/infinite-reactive-loop': 'error',
+            'svelte/no-at-debug-tags': 'warn',
+            'svelte/no-at-html-tags': 'error',
+            'svelte/no-dom-manipulating': 'error',
+            'svelte/no-dupe-else-if-blocks': 'error',
+            'svelte/no-dupe-on-directives': 'error',
+            'svelte/no-dupe-style-properties': 'error',
+            'svelte/no-dupe-use-directives': 'error',
+            'svelte/no-export-load-in-svelte-module-in-kit-pages': 'error',
+            'svelte/no-immutable-reactive-statements': 'error',
+            'svelte/no-inner-declarations': 'error',
+            'svelte/no-inspect': 'warn',
+            'svelte/no-navigation-without-resolve': 'error',
+            'svelte/no-not-function-handler': 'error',
+            'svelte/no-object-in-text-mustaches': 'error',
+            'svelte/no-raw-special-elements': 'error',
+            'svelte/no-reactive-functions': 'error',
+            'svelte/no-reactive-literals': 'error',
+            'svelte/no-reactive-reassign': 'error',
+            'svelte/no-shorthand-style-property-overrides': 'error',
+            'svelte/no-store-async': 'error',
+            'svelte/no-svelte-internal': 'error',
+            'svelte/no-unknown-style-directive-property': 'error',
+            'svelte/no-unnecessary-state-wrap': 'error',
+            'svelte/no-unused-props': 'error',
+            'svelte/no-unused-svelte-ignore': 'error',
+            'svelte/no-useless-children-snippet': 'error',
+            'svelte/no-useless-mustaches': 'error',
+            'svelte/prefer-svelte-reactivity': 'error',
+            'svelte/prefer-writable-derived': 'error',
+            'svelte/require-each-key': 'error',
+            'svelte/require-event-dispatcher-types': 'error',
+            'svelte/require-store-reactive-access': 'error',
+            'svelte/system': 'error',
+            'svelte/valid-each-key': 'error',
+            'svelte/valid-prop-names-in-kit-pages': 'error'
+        }
+    }
+];
+export default config;