refactor(member-live): modularize the overview and drop the superseded in-memory paths

Extract the cookie parser, export-payload builder and fee-status helper
into their own modules and remove the filter/sort/load helpers the
database pushdown made dead, so the overview LiveView stays a thin
coordinator over focused units.

lib/mv_web/components/core_components.ex

@@ -143,12 +143,18 @@ defmodule MvWeb.CoreComponents do
 
   attr :size, :string, values: ~w(sm md lg), default: "md"
   attr :disabled, :boolean, default: false, doc: "Whether the button is disabled"
+
+  attr :active, :boolean,
+    default: false,
+    doc: "Renders the button in its active/pressed (toggled-on) state"
+
   slot :inner_block, required: true
 
   def button(assigns) do
     rest = assigns.rest
     variant = assigns[:variant] || "primary"
     size = assigns[:size] || "md"
+    active_class = if assigns[:active], do: "btn-active", else: ""
 
     variant_classes = %{
       "primary" => "btn-primary",
@@ -169,7 +175,9 @@ defmodule MvWeb.CoreComponents do
 
     base_class = Map.fetch!(variant_classes, variant)
     size_class = size_classes[size]
-    btn_class = [base_class, size_class] |> Enum.reject(&(&1 == "")) |> Enum.join(" ")
+
+    btn_class =
+      [base_class, size_class, active_class] |> Enum.reject(&(&1 == "")) |> Enum.join(" ")
 
     assigns =
       assigns
@@ -214,6 +222,27 @@ defmodule MvWeb.CoreComponents do
     end
   end
 
+  @doc """
+  Renders a loading spinner for inline "busy" states.
+
+  Wraps the DaisyUI `loading` classes so views never spell them out. Mark it
+  `aria-hidden="true"` when an adjacent text label already conveys the busy state.
+
+  ## Examples
+
+      <.spinner />
+      <.spinner size="lg" aria-hidden="true" />
+  """
+  attr :size, :string, values: ~w(xs sm md lg), default: "sm"
+  attr :class, :any, default: nil, doc: "Additional layout classes"
+  attr :rest, :global
+
+  def spinner(assigns) do
+    ~H"""
+    <span class={["loading loading-spinner", "loading-#{@size}", @class]} {@rest}></span>
+    """
+  end
+
   @doc """
   Renders a non-interactive badge with WCAG-compliant contrast.