Refactor permission handling and authentication services

Replaced `PermissionClaim` enum with an OpenAPI-defined schema `PermissionClaimDto` for consistency across frontend and backend. Refactored authentication flow to utilize `AuthService` on the frontend, consolidating JWT handling logic. Removed redundant methods like `saveJwt` and integrated robust permission management throughout the application.

frontend/src/app/forms/forms.component.ts

@@ -1,12 +1,12 @@
 import {Component, Input, OnInit} from '@angular/core';
 import {HeaderComponent} from '../header/header.component';
-import {LoginService} from '../../api';
 import {MatDialog} from '@angular/material/dialog';
 import {ActivatedRoute} from '@angular/router';
 import {LoginDialogComponent} from '../login/login.component';
 import {KeyValuePipe, NgForOf, NgIf} from '@angular/common';
 import {FormType} from './form_type';
 import {MatButton} from '@angular/material/button';
+import {AuthService} from '../services/auth.service';
 
 @Component({
   selector: 'app-forms',
@@ -26,7 +26,7 @@ export class FormsComponent implements OnInit {
 
   public type: FormType | undefined;
 
-  constructor(private loginService: LoginService,
+  constructor(private authService: AuthService,
               private dialog: MatDialog,
               private route: ActivatedRoute,
   ) {
@@ -34,16 +34,14 @@ export class FormsComponent implements OnInit {
       const code = params.get('code');
 
       if (code) {
-        this.loginService.login(code).subscribe(jwt => this.saveJwt(jwt as JsonWebKey)); //TODO handle error
-      } else {
+        this.authService.login(code).subscribe();
+      } else if (!this.authService.checkAuthStatus()) {
         const dialogRef = this.dialog.open(LoginDialogComponent, {
           width: '400px',
           disableClose: true
         });
 
-        dialogRef.afterClosed().subscribe(jwt => {
-          this.saveJwt(jwt as JsonWebKey)
-        });
+        dialogRef.afterClosed().subscribe();
       }
     });
   }
@@ -61,18 +59,6 @@ export class FormsComponent implements OnInit {
     });
   }
 
-  private saveJwt(jwt: JsonWebKey) {
-    const claims = this.extractJwtClaims(jwt);
-    const authorizations = claims?.authorizations || [];
-  }
-
-  private extractJwtClaims(jwt: JsonWebKey): any {
-    const token = jwt.toString();
-    const base64Url = token.split('.')[1];
-    const base64 = base64Url.replace(/-/g, '+').replace(/_/g, '/');
-    return JSON.parse(window.atob(base64));
-  }
-
   protected readonly FormType = FormType;
   protected readonly Object = Object;