feat: add col_click attribute to table component for checkbox column

- Add col_click slot attribute to table component that overrides row_click
- Clicking anywhere in the checkbox column now toggles the checkbox
- Clicking other columns still navigates to member details

Closes #223

lib/mv_web/live/member_live/index.ex

@@ -892,6 +892,16 @@ defmodule MvWeb.MemberLive.Index do
     |> Enum.map(&format_member_email/1)
   end
 
+  @doc """
+  Returns a JS command to toggle member selection when clicking the checkbox column.
+
+  Used as `col_click` handler to ensure clicking anywhere in the checkbox column
+  toggles the checkbox instead of navigating to the member details.
+  """
+  def checkbox_column_click(member) do
+    JS.push("select_member", value: %{id: member.id})
+  end
+
   # Formats a member's email in the format "First Last <email>"
   # Used for copy_emails feature and mailto links to create email-client-friendly format.
   def format_member_email(member) do