feat: add create-participant intent for inline participant creation

app/routes/admin.sports-seasons.$id.events.$eventId.server.ts

@@ -1,7 +1,7 @@
 import type { Route } from "./+types/admin.sports-seasons.$id.events.$eventId";
 import { logger } from "~/lib/logger";
 import { findSportsSeasonById } from "~/models/sports-season";
-import { findParticipantsBySportsSeasonId } from "~/models/participant";
+import { findParticipantsBySportsSeasonId, createParticipant } from "~/models/participant";
 import {
   getScoringEventById,
   completeScoringEvent,
@@ -366,5 +366,32 @@ export async function action({ request, params }: Route.ActionArgs) {
     }
   }
 
+  if (intent === "create-participant") {
+    const name = formData.get("name");
+    const sportsSeasonId = formData.get("sportsSeasonId");
+
+    if (typeof name !== "string" || !name.trim()) {
+      return { error: "Participant name is required" };
+    }
+
+    if (typeof sportsSeasonId !== "string" || !sportsSeasonId) {
+      return { error: "Sports season ID is required" };
+    }
+
+    try {
+      const participant = await createParticipant({
+        name: name.trim(),
+        sportsSeasonId,
+      });
+      return {
+        success: `Participant "${participant.name}" created.`,
+        newParticipant: { id: participant.id, name: participant.name },
+      };
+    } catch (error) {
+      logger.error("Error creating participant:", error);
+      return { error: "Failed to create participant" };
+    }
+  }
+
   return { error: "Invalid action" };
 }