add SettingsField struct and repeater field type for block settings

Introduces typed settings schema with SettingsField struct, replaces
the read-only JSON textarea with a full repeater UI for info_card items.
Supports add, remove, reorder and inline editing of repeater items.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/berrypod_web/live/admin/pages_test.exs

@@ -478,4 +478,153 @@ defmodule BerrypodWeb.Admin.PagesTest do
       assert has_element?(view, "#block-#{hero["id"]}.block-card-expanded")
     end
   end
+
+  describe "repeater fields" do
+    setup %{conn: conn, user: user} do
+      %{conn: log_in_user(conn, user)}
+    end
+
+    test "repeater items render with input fields", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/admin/pages/contact")
+
+      page = Pages.get_page("contact")
+      info_card = Enum.find(page.blocks, &(&1["type"] == "info_card"))
+
+      render_click(view, "toggle_expand", %{"id" => info_card["id"]})
+
+      # Should render 3 default items with label/value inputs
+      html = render(view)
+      assert html =~ "Printing"
+      assert html =~ "Delivery"
+      assert html =~ "Issues"
+    end
+
+    test "editing a repeater item field sets dirty flag", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/admin/pages/contact")
+
+      page = Pages.get_page("contact")
+      info_card = Enum.find(page.blocks, &(&1["type"] == "info_card"))
+
+      render_click(view, "toggle_expand", %{"id" => info_card["id"]})
+
+      render_change(view, "update_block_settings", %{
+        "block_id" => info_card["id"],
+        "block_settings" => %{
+          "title" => "Handy to know",
+          "items" => %{
+            "0" => %{"label" => "Shipping", "value" => "1-3 business days"},
+            "1" => %{
+              "label" => "Delivery",
+              "value" => "Example: 3-7 business days after printing"
+            },
+            "2" => %{"label" => "Issues", "value" => "Example: Reprints for any defects"}
+          }
+        }
+      })
+
+      assert has_element?(view, ".admin-badge-warning", "Unsaved changes")
+    end
+
+    test "adding a repeater item appends an empty item", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/admin/pages/contact")
+
+      page = Pages.get_page("contact")
+      info_card = Enum.find(page.blocks, &(&1["type"] == "info_card"))
+
+      render_click(view, "toggle_expand", %{"id" => info_card["id"]})
+
+      # Should have 3 items initially
+      assert render(view) |> count_repeater_items() == 3
+
+      render_click(view, "repeater_add", %{
+        "block-id" => info_card["id"],
+        "field" => "items"
+      })
+
+      # Now 4 items
+      assert render(view) |> count_repeater_items() == 4
+      assert has_element?(view, ".admin-badge-warning", "Unsaved changes")
+    end
+
+    test "removing a repeater item removes it from the list", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/admin/pages/contact")
+
+      page = Pages.get_page("contact")
+      info_card = Enum.find(page.blocks, &(&1["type"] == "info_card"))
+
+      render_click(view, "toggle_expand", %{"id" => info_card["id"]})
+
+      render_click(view, "repeater_remove", %{
+        "block-id" => info_card["id"],
+        "field" => "items",
+        "index" => "0"
+      })
+
+      html = render(view)
+      assert count_repeater_items(html) == 2
+      # "Printing" was item 0, should be gone
+      refute html =~ "Printing"
+      assert html =~ "Delivery"
+    end
+
+    test "moving a repeater item changes order", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/admin/pages/contact")
+
+      page = Pages.get_page("contact")
+      info_card = Enum.find(page.blocks, &(&1["type"] == "info_card"))
+
+      render_click(view, "toggle_expand", %{"id" => info_card["id"]})
+
+      render_click(view, "repeater_move", %{
+        "block-id" => info_card["id"],
+        "field" => "items",
+        "index" => "0",
+        "dir" => "down"
+      })
+
+      # Save and check the persisted order
+      render_click(view, "save")
+
+      saved = Pages.get_page("contact")
+      saved_info = Enum.find(saved.blocks, &(&1["type"] == "info_card"))
+      labels = Enum.map(saved_info["settings"]["items"], & &1["label"])
+
+      # "Printing" moved from 0 to 1
+      assert labels == ["Delivery", "Printing", "Issues"]
+    end
+
+    test "repeater changes persist after save", %{conn: conn} do
+      {:ok, view, _html} = live(conn, ~p"/admin/pages/contact")
+
+      page = Pages.get_page("contact")
+      info_card = Enum.find(page.blocks, &(&1["type"] == "info_card"))
+
+      render_click(view, "toggle_expand", %{"id" => info_card["id"]})
+
+      # Edit item via phx-change
+      render_change(view, "update_block_settings", %{
+        "block_id" => info_card["id"],
+        "block_settings" => %{
+          "title" => "Good to know",
+          "items" => %{
+            "0" => %{"label" => "Shipping", "value" => "Fast shipping"},
+            "1" => %{"label" => "Returns", "value" => "Easy returns"}
+          }
+        }
+      })
+
+      render_click(view, "save")
+
+      saved = Pages.get_page("contact")
+      saved_info = Enum.find(saved.blocks, &(&1["type"] == "info_card"))
+      assert saved_info["settings"]["title"] == "Good to know"
+      assert length(saved_info["settings"]["items"]) == 2
+      assert Enum.at(saved_info["settings"]["items"], 0)["label"] == "Shipping"
+      assert Enum.at(saved_info["settings"]["items"], 0)["value"] == "Fast shipping"
+    end
+  end
+
+  defp count_repeater_items(html) do
+    Regex.scan(~r/class="repeater-item"/, html) |> length()
+  end
 end