feat: Allow direct RDP connections

Resolves #6

frontend/src/app/schemes.ts

@@ -13,6 +13,7 @@ export interface Session {
   id: string;
   last_seen: string;
   type: 'persistent' | 'readonly';
+  rdp_host?: string;
   rdp_password: string;
   guacamole_username: string;
   guacamole_password: string;

frontend/src/app/sessions/user-sessions-wrapper/active-sessions/connection-dialog/connection-dialog.component.html

@@ -33,13 +33,34 @@
 
 <div class="m-m-card">
   <div class="mb-1 text-base font-bold">Connect to the session</div>
-  Please click on this button to connect to the server: <br />
-  <div class="mt-2">
-    <button mat-flat-button color="primary" (click)="redirectToGuacamole()">
-      Connect to Session
+  Please choose if you want to connect via the browser or via a native RDP
+  client to the session.
+  <div class="mt-2 flex gap-2">
+    <button mat-raised-button color="primary" (click)="redirectToGuacamole()">
+      Connect via browser
+    </button>
+    <button mat-raised-button color="primary" (click)="requestNativeClient()">
+      Connect via native client
     </button>
   </div>
 </div>
+<div *ngIf="nativeClient">
+  <hr />
+  <div class="m-m-card">
+    <div class="mb-1 text-base font-bold">Wait for a public route</div>
+    We have requested a public route to your session. <br />Once the route is
+    available the status will be updated here. <br />This can take up to one
+    minute.
+  </div>
+  <hr />
+  <div class="m-m-card">
+    <div class="mb-1 text-base font-bold">Open the native client</div>
+    When you click on this button, your browser will ask you to open the native
+    client. <br />
+    Please confirm the dialog. If it does not work, you can also connect
+    manually with the following data:
+  </div>
+</div>
 <hr />
 <div class="m-m-card">
   <div class="mb-1 text-base font-bold">
@@ -49,8 +70,3 @@
   {{ session.version?.name }} starts automatically. This can take up to one
   minute.
 </div>
-<div>
-  <button mat-stroked-button class="w-full" (click)="this.dialogRef.close()">
-    Close
-  </button>
-</div>