Enhance SEO and feedback features across the application

- Updated index.html with improved meta tags for SEO, including author and theme color.
- Added a feedback dialog in ImprintContainer.vue for user feedback submission.
- Refactored LoginForm.vue to utilize a utility for cookie management, simplifying profile persistence.
- Introduced new routes and schemas for feedback in the router and server, enhancing SEO and user experience.
- Improved ChatView.vue with better error handling and command table display.
- Implemented feedback API endpoints in server routes for managing user feedback submissions and admin access.

These changes collectively improve the application's SEO, user interaction, and feedback management capabilities.

server/feedback-store.js

@@ -0,0 +1,55 @@
+import crypto from 'crypto';
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from 'fs';
+import { join } from 'path';
+
+const FEEDBACK_FILE_NAME = 'feedback.json';
+
+function ensureLogsDir(baseDir) {
+  const logsDir = join(baseDir, '../logs');
+  if (!existsSync(logsDir)) {
+    mkdirSync(logsDir, { recursive: true });
+  }
+  return logsDir;
+}
+
+function getFeedbackPath(baseDir) {
+  return join(ensureLogsDir(baseDir), FEEDBACK_FILE_NAME);
+}
+
+export function ensureFeedbackFile(baseDir) {
+  const feedbackPath = getFeedbackPath(baseDir);
+  if (!existsSync(feedbackPath)) {
+    writeFileSync(feedbackPath, '[]\n', 'utf-8');
+  }
+}
+
+export function loadFeedback(baseDir) {
+  ensureFeedbackFile(baseDir);
+  const feedbackPath = getFeedbackPath(baseDir);
+  const raw = readFileSync(feedbackPath, 'utf-8').trim();
+  if (!raw) return [];
+
+  try {
+    const parsed = JSON.parse(raw);
+    return Array.isArray(parsed) ? parsed : [];
+  } catch (error) {
+    throw new Error(`Ungültige ${FEEDBACK_FILE_NAME}: ${error.message}`);
+  }
+}
+
+export function saveFeedback(baseDir, items) {
+  const feedbackPath = getFeedbackPath(baseDir);
+  writeFileSync(feedbackPath, `${JSON.stringify(items, null, 2)}\n`, 'utf-8');
+}
+
+export function createFeedbackEntry(input) {
+  return {
+    id: crypto.randomUUID(),
+    createdAt: new Date().toISOString(),
+    name: typeof input.name === 'string' ? input.name.trim() : '',
+    age: Number.isFinite(input.age) ? input.age : null,
+    country: typeof input.country === 'string' ? input.country.trim() : '',
+    gender: typeof input.gender === 'string' ? input.gender.trim() : '',
+    comment: typeof input.comment === 'string' ? input.comment.trim() : ''
+  };
+}