feat(server, models, services, frontend): integrate Click-TT account functionality

- Added ClickTtAccount model and integrated it into the server and database synchronization processes.
- Updated ClickTtPlayerRegistrationService to utilize ClickTtAccount for user account management, enhancing the registration flow.
- Modified frontend components to include navigation to Click-TT account settings and updated routing to support the new account view.
- Improved error handling and user feedback in the registration process, ensuring clarity in account-related operations.

backend/controllers/clickTtAccountController.js

@@ -0,0 +1,72 @@
+import clickTtAccountService from '../services/clickTtAccountService.js';
+import HttpError from '../exceptions/HttpError.js';
+
+class ClickTtAccountController {
+  async getAccount(req, res, next) {
+    try {
+      const account = await clickTtAccountService.getAccount(req.user.id);
+      res.status(200).json({ account });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  async getStatus(req, res, next) {
+    try {
+      const status = await clickTtAccountService.checkAccountStatus(req.user.id);
+      res.status(200).json(status);
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  async upsertAccount(req, res, next) {
+    try {
+      const { username, password, savePassword, userPassword } = req.body;
+      if (!username) {
+        throw new HttpError('Benutzername erforderlich', 400);
+      }
+      if (password && !userPassword) {
+        throw new HttpError('App-Passwort erforderlich zum Setzen des HTTV-/click-TT-Passworts', 400);
+      }
+
+      const account = await clickTtAccountService.upsertAccount(
+        req.user.id,
+        username,
+        password,
+        savePassword || false,
+        userPassword
+      );
+
+      res.status(200).json({
+        message: 'HTTV-/click-TT-Account erfolgreich gespeichert',
+        account
+      });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  async deleteAccount(req, res, next) {
+    try {
+      const deleted = await clickTtAccountService.deleteAccount(req.user.id);
+      if (!deleted) {
+        throw new HttpError('Kein HTTV-/click-TT-Account gefunden', 404);
+      }
+      res.status(200).json({ message: 'HTTV-/click-TT-Account gelöscht' });
+    } catch (error) {
+      next(error);
+    }
+  }
+
+  async verifyLogin(req, res, next) {
+    try {
+      const result = await clickTtAccountService.verifyLogin(req.user.id, req.body.password);
+      res.status(200).json({ success: true, message: 'Login erfolgreich', ...result });
+    } catch (error) {
+      next(error);
+    }
+  }
+}
+
+export default new ClickTtAccountController();