test: restore removed tests including optimizations

test/mv_web/live/user_live/show_test.exs

@@ -23,12 +23,14 @@ defmodule MvWeb.UserLive.ShowTest do
   end
 
   describe "mount and display" do
-    @tag :slow
-    test "mounts successfully with valid user ID", %{conn: conn, user: user} do
+    @tag :ui
+    test "mounts successfully and displays user information", %{conn: conn, user: user} do
       conn = conn_with_oidc_user(conn)
       {:ok, _view, html} = live(conn, ~p"/users/#{user.id}")
 
+      # Basic display
       assert html =~ to_string(user.email)
+      assert html =~ gettext("Email")
     end
 
     test "displays password authentication status when enabled", %{conn: conn} do
@@ -96,6 +98,47 @@ defmodule MvWeb.UserLive.ShowTest do
     end
   end
 
+  describe "navigation" do
+    @tag :ui
+    test "navigation buttons work correctly", %{conn: conn, user: user} do
+      conn = conn_with_oidc_user(conn)
+      {:ok, view, _html} = live(conn, ~p"/users/#{user.id}")
+
+      # Back button navigates to user list
+      assert {:error, {:live_redirect, %{to: to}}} =
+               view
+               |> element(
+                 "a[aria-label='#{gettext("Back to users list")}'], button[aria-label='#{gettext("Back to users list")}']"
+               )
+               |> render_click()
+
+      assert to == "/users"
+
+      # Edit button navigates to edit form
+      {:ok, view, _html} = live(conn, ~p"/users/#{user.id}")
+
+      assert {:error, {:live_redirect, %{to: to}}} =
+               view
+               |> element(
+                 "a[href='/users/#{user.id}/edit?return_to=show'], button[href='/users/#{user.id}/edit?return_to=show']"
+               )
+               |> render_click()
+
+      assert to == "/users/#{user.id}/edit?return_to=show"
+    end
+  end
+
+  describe "page title" do
+    @tag :ui
+    test "sets correct page title", %{conn: conn, user: user} do
+      conn = conn_with_oidc_user(conn)
+      {:ok, _view, html} = live(conn, ~p"/users/#{user.id}")
+
+      # Check that page title is set (might be in title tag or header)
+      assert html =~ gettext("Show User") || html =~ to_string(user.email)
+    end
+  end
+
   describe "error handling" do
     test "raises exception for invalid user ID", %{conn: conn} do
       invalid_id = Ecto.UUID.generate()