fix: api and structure search fixes

lib/wanderer_app_web/controllers/map_system_api_controller.ex

@@ -441,18 +441,19 @@ defmodule WandererAppWeb.MapSystemAPIController do
   )
 
   def show(%{assigns: %{map_id: map_id}} = conn, %{"id" => id}) do
-    with {:ok, system_uuid} <- APIUtils.validate_uuid(id),
-         {:ok, system} <- WandererApp.Api.MapSystem.by_id(system_uuid) do
-      # Verify the system belongs to the requested map
-      if system.map_id == map_id do
-        APIUtils.respond_data(conn, APIUtils.map_system_to_json(system))
-      else
+    # Look up by solar_system_id (EVE Online integer ID)
+    case APIUtils.parse_int(id) do
+      {:ok, solar_system_id} ->
+        case Operations.get_system(map_id, solar_system_id) do
+          {:ok, system} ->
+            APIUtils.respond_data(conn, APIUtils.map_system_to_json(system))
+
+          {:error, :not_found} ->
+            {:error, :not_found}
+        end
+
+      {:error, _} ->
         {:error, :not_found}
-      end
-    else
-      {:error, %Ash.Error.Query.NotFound{}} -> {:error, :not_found}
-      {:error, _} -> {:error, :not_found}
-      error -> error
     end
   end
 
@@ -472,8 +473,22 @@ defmodule WandererAppWeb.MapSystemAPIController do
   )
 
   def create(conn, params) do
-    systems = Map.get(params, "systems", [])
-    connections = Map.get(params, "connections", [])
+    # Support both batch format {"systems": [...], "connections": [...]}
+    # and single system format {"solar_system_id": ..., ...}
+    {systems, connections} =
+      cond do
+        Map.has_key?(params, "systems") ->
+          # Batch format
+          {Map.get(params, "systems", []), Map.get(params, "connections", [])}
+
+        Map.has_key?(params, "solar_system_id") or Map.has_key?(params, :solar_system_id) ->
+          # Single system format - wrap it in an array
+          {[params], []}
+
+        true ->
+          # Empty request
+          {[], []}
+      end
 
     case Operations.upsert_systems_and_connections(conn, systems, connections) do
       {:ok, result} ->