feat(overview): replace filter panel with add-filter builder and aging column

Swaps the unbounded vertical filter panel for a Polaris-style add-filter
builder (searchable grouped field picker, type-aware value control, applied
chips) and colour-codes the fees column with each member's period-scoped
unpaid-cycle count.

test/mv_web/member_live/index_default_columns_test.exs

@@ -40,7 +40,9 @@ defmodule MvWeb.MemberLive.IndexDefaultColumnsTest do
     # Fee type, fee status, groups, join date headers.
     assert has_element?(view, "[data-testid='membership_fee_type']")
     assert has_element?(view, "[data-testid='join_date']")
-    assert has_element?(view, "th", "Membership Fee Status")
+    # The former "Membership Fee Status" column is now the period-scoped payment
+    # aging column (§3.3), headed "Fees".
+    assert has_element?(view, "th", "Fees")
     assert has_element?(view, "[data-testid='groups']")
   end