feat(homarr): make apps list configurable with auto-layout

roles/homarr/defaults/main.yml

@@ -54,4 +54,32 @@ homarr_use_ssl: true
 # Local admin
 homarr_admin_username: "admin"
 homarr_admin_email: "admin@digitalboard.ch"
-homarr_admin_password: "ChangeMe123!"
+homarr_admin_password: "ChangeMe123!"
+
+# Applications shown on the default board.
+# Each app needs id, name, description, icon, href and a width (1-10).
+# Height defaults to 1, can be increased for taller tiles.
+# Apps are automatically packed left-to-right into the desktop grid (10 cols),
+# scaled to tablet (6 cols) and mobile (2 cols).
+homarr_apps:
+  - id: nextcloud
+    name: Nextcloud
+    description: Cloud Storage & Collaboration
+    icon: https://cdn.jsdelivr.net/gh/walkxcode/dashboard-icons/png/nextcloud.png
+    href: https://cloud.digitalboard.ch
+    width: 2
+    height: 1
+  - id: keycloak
+    name: Keycloak
+    description: Identity & Access Management
+    icon: https://cdn.jsdelivr.net/gh/walkxcode/dashboard-icons/png/keycloak.png
+    href: https://auth.digitalboard.ch
+    width: 2
+    height: 1
+  - id: mailman
+    name: Mailman
+    description: Mailing List Manager
+    icon: https://cdn.jsdelivr.net/gh/walkxcode/dashboard-icons/png/mailman.png
+    href: https://lists.digitalboard.ch
+    width: 2
+    height: 1