Add participant creation functionality to event API, including backend service and database integration. Update frontend to support participant registration and enhance UI for displaying registered players.

openapi/openapi.yaml

@@ -195,6 +195,43 @@ paths:
                 type: array
                 items:
                   $ref: "#/components/schemas/EventRegistration"
+  /api/events/{eventId}/participants:
+    post:
+      tags: [Events]
+      operationId: createGuestParticipant
+      parameters:
+        - $ref: "#/components/parameters/EventId"
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [displayName, ratings, status]
+              properties:
+                displayName:
+                  type: string
+                  minLength: 1
+                ratings:
+                  $ref: "#/components/schemas/Ratings"
+                status:
+                  type: string
+                  enum: [Going, Maybe, NotGoing]
+      responses:
+        "201":
+          description: Guest participant created and registered
+          content:
+            application/json:
+              schema:
+                type: object
+                required: [player, rsvp]
+                properties:
+                  player:
+                    $ref: "#/components/schemas/Player"
+                  rsvp:
+                    $ref: "#/components/schemas/EventRegistration"
+        "403":
+          $ref: "#/components/responses/Forbidden"
   /api/events/{eventId}/rsvps/{playerId}:
     put:
       tags: [Events]