chore: Make `search_term` input IDs unique

This resolves a browser console error:
`Multiple IDs detected: search_term. Ensure unique element ids.`

lib/medical_transcription_web/components/code_select.ex

@@ -11,7 +11,6 @@ defmodule MedicalTranscriptionWeb.Components.CodeSelect do
   def mount(socket) do
     socket =
       socket
-      |> assign(:form, to_form(%{"search_term" => ""}))
       |> assign(:codes, [])
       |> assign(:selected_code, nil)
       |> assign(:submitted_code_feedback, nil)
@@ -20,8 +19,15 @@ defmodule MedicalTranscriptionWeb.Components.CodeSelect do
   end
 
   @impl Phoenix.LiveComponent
-  def update(%{text: text} = _assigns, socket) do
-    {:ok, assign(socket, :text, text)}
+  def update(%{id: id, text: text} = _assigns, socket) do
+    form = to_form(%{"search_term" => ""}, as: id)
+
+    socket =
+      socket
+      |> assign(:form, form)
+      |> assign(:text, text)
+
+    {:ok, socket}
   end
 
   @impl Phoenix.LiveComponent