Discord community: role sync, announcements webhook, launcher invite

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DjMbLQujBHunCCu5GpsHaT

panel/server/src/routes/admin.rs

@@ -252,6 +252,9 @@ pub struct Group {
     #[serde(default)]
     #[sqlx(default)]
     luckperms_group: String,
+    #[serde(default)]
+    #[sqlx(default)]
+    discord_role: String,
 }
 fn default_color() -> String {
     "#7c5cff".into()
@@ -260,7 +263,7 @@ fn default_color() -> String {
 pub async fn list_groups(_: AdminUser, State(state): State<AppState>) -> AppResult<Json<Vec<Group>>> {
     Ok(Json(
         sqlx::query_as(
-            "SELECT g.id, g.name, g.color, (SELECT COUNT(*) FROM user_groups ug WHERE ug.group_id = g.id) AS members, g.luckperms_group FROM groups g ORDER BY g.name",
+            "SELECT g.id, g.name, g.color, (SELECT COUNT(*) FROM user_groups ug WHERE ug.group_id = g.id) AS members, g.luckperms_group, g.discord_role FROM groups g ORDER BY g.name",
         )
         .fetch_all(&state.db)
         .await?,