add pagination across all admin and shop views

URL-based offset pagination with ?page=N for bookmarkable pages.
Admin views use push_patch, shop collection uses navigate links.
Responsive on mobile with horizontal-scroll tables and stacking
pagination controls. Includes dev seed script for testing.

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

lib/berrypod_web/live/admin/newsletter.ex

@@ -6,8 +6,8 @@ defmodule BerrypodWeb.Admin.Newsletter do
   @impl true
   def mount(_params, _session, socket) do
     counts = Newsletter.count_subscribers_by_status()
-    subscribers = Newsletter.list_subscribers()
-    campaigns = Newsletter.list_campaigns()
+    sub_page = Newsletter.list_subscribers_paginated(page: 1)
+    camp_page = Newsletter.list_campaigns_paginated(page: 1)
 
     {:ok,
      socket
@@ -15,38 +15,47 @@ defmodule BerrypodWeb.Admin.Newsletter do
      |> assign(:tab, "overview")
      |> assign(:newsletter_enabled, Newsletter.newsletter_enabled?())
      |> assign(:status_counts, counts)
-     |> assign(:subscriber_count, length(subscribers))
-     |> assign(:campaign_count, length(campaigns))
+     |> assign(:subscriber_pagination, sub_page)
+     |> assign(:subscriber_count, sub_page.total_count)
+     |> assign(:campaign_pagination, camp_page)
+     |> assign(:campaign_count, camp_page.total_count)
      |> assign(:status_filter, "all")
      |> assign(:search, "")
-     |> stream(:subscribers, subscribers)
-     |> stream(:campaigns, campaigns)}
+     |> stream(:subscribers, sub_page.items)
+     |> stream(:campaigns, camp_page.items)}
   end
 
   @impl true
-  def handle_params(%{"tab" => tab}, _uri, socket)
-      when tab in ~w(overview subscribers campaigns) do
+  def handle_params(params, _uri, socket) do
+    tab =
+      if params["tab"] in ~w(overview subscribers campaigns), do: params["tab"], else: "overview"
+
+    page_num = Berrypod.Pagination.parse_page(params)
+
     socket = assign(socket, :tab, tab)
 
     socket =
       case tab do
         "subscribers" ->
-          subscribers =
-            Newsletter.list_subscribers(
+          page =
+            Newsletter.list_subscribers_paginated(
               status: socket.assigns.status_filter,
-              search: socket.assigns.search
+              search: socket.assigns.search,
+              page: page_num
             )
 
           socket
-          |> assign(:subscriber_count, length(subscribers))
-          |> stream(:subscribers, subscribers, reset: true)
+          |> assign(:subscriber_pagination, page)
+          |> assign(:subscriber_count, page.total_count)
+          |> stream(:subscribers, page.items, reset: true)
 
         "campaigns" ->
-          campaigns = Newsletter.list_campaigns()
+          page = Newsletter.list_campaigns_paginated(page: page_num)
 
           socket
-          |> assign(:campaign_count, length(campaigns))
-          |> stream(:campaigns, campaigns, reset: true)
+          |> assign(:campaign_pagination, page)
+          |> assign(:campaign_count, page.total_count)
+          |> stream(:campaigns, page.items, reset: true)
 
         _ ->
           socket
@@ -55,8 +64,6 @@ defmodule BerrypodWeb.Admin.Newsletter do
     {:noreply, socket}
   end
 
-  def handle_params(_params, _uri, socket), do: {:noreply, socket}
-
   @impl true
   def handle_event("toggle_enabled", _params, socket) do
     new_value = !socket.assigns.newsletter_enabled
@@ -71,23 +78,17 @@ defmodule BerrypodWeb.Admin.Newsletter do
   end
 
   def handle_event("filter_subscribers", %{"status" => status}, socket) do
-    subscribers = Newsletter.list_subscribers(status: status, search: socket.assigns.search)
-
     {:noreply,
      socket
      |> assign(:status_filter, status)
-     |> assign(:subscriber_count, length(subscribers))
-     |> stream(:subscribers, subscribers, reset: true)}
+     |> push_patch(to: ~p"/admin/newsletter?tab=subscribers")}
   end
 
   def handle_event("search_subscribers", %{"search" => term}, socket) do
-    subscribers = Newsletter.list_subscribers(status: socket.assigns.status_filter, search: term)
-
     {:noreply,
      socket
      |> assign(:search, term)
-     |> assign(:subscriber_count, length(subscribers))
-     |> stream(:subscribers, subscribers, reset: true)}
+     |> push_patch(to: ~p"/admin/newsletter?tab=subscribers")}
   end
 
   def handle_event("delete_subscriber", %{"id" => id}, socket) do
@@ -152,12 +153,17 @@ defmodule BerrypodWeb.Admin.Newsletter do
         status_filter={@status_filter}
         status_counts={@status_counts}
         subscriber_count={@subscriber_count}
+        subscriber_pagination={@subscriber_pagination}
         search={@search}
       />
     </div>
 
     <div :if={@tab == "campaigns"}>
-      <.campaigns_tab streams={@streams} campaign_count={@campaign_count} />
+      <.campaigns_tab
+        streams={@streams}
+        campaign_count={@campaign_count}
+        campaign_pagination={@campaign_pagination}
+      />
     </div>
     """
   end
@@ -254,6 +260,7 @@ defmodule BerrypodWeb.Admin.Newsletter do
   attr :status_filter, :string, required: true
   attr :status_counts, :map, required: true
   attr :subscriber_count, :integer, required: true
+  attr :subscriber_pagination, Berrypod.Pagination, required: true
   attr :search, :string, required: true
 
   defp subscribers_tab(assigns) do
@@ -323,6 +330,13 @@ defmodule BerrypodWeb.Admin.Newsletter do
         </:action>
       </.table>
 
+      <.admin_pagination
+        :if={@subscriber_count > 0}
+        page={@subscriber_pagination}
+        patch={~p"/admin/newsletter"}
+        params={%{"tab" => "subscribers"}}
+      />
+
       <div :if={@subscriber_count == 0} class="text-center py-12 text-base-content/60">
         <.icon name="hero-envelope" class="size-12 mx-auto mb-4" />
         <p class="text-lg font-medium">No subscribers yet</p>
@@ -336,6 +350,7 @@ defmodule BerrypodWeb.Admin.Newsletter do
 
   attr :streams, :any, required: true
   attr :campaign_count, :integer, required: true
+  attr :campaign_pagination, Berrypod.Pagination, required: true
 
   defp campaigns_tab(assigns) do
     ~H"""
@@ -370,6 +385,13 @@ defmodule BerrypodWeb.Admin.Newsletter do
         </:action>
       </.table>
 
+      <.admin_pagination
+        :if={@campaign_count > 0}
+        page={@campaign_pagination}
+        patch={~p"/admin/newsletter"}
+        params={%{"tab" => "campaigns"}}
+      />
+
       <div :if={@campaign_count == 0} class="text-center py-12 text-base-content/60">
         <.icon name="hero-megaphone" class="size-12 mx-auto mb-4" />
         <p class="text-lg font-medium">No campaigns yet</p>