feat(profile): show beacon monitors section on own user profile page

Add a Beacon monitors card to /u/:callsign that appears only when the
viewer is the profile owner. Shows registered monitors with truncated
token and last-seen timestamp, with a link to manage monitors in
settings. Includes tests for visibility rules.

lib/microwaveprop_web/live/user_profile_live.ex

@@ -3,6 +3,7 @@ defmodule MicrowavepropWeb.UserProfileLive do
   use MicrowavepropWeb, :live_view
 
   alias Microwaveprop.Accounts
+  alias Microwaveprop.BeaconMonitors
   alias Microwaveprop.Beacons
   alias Microwaveprop.Beacons.Beacon
   alias Microwaveprop.Format
@@ -23,13 +24,22 @@ defmodule MicrowavepropWeb.UserProfileLive do
         beacons = Beacons.list_beacons_for_user(user, viewer)
         involving = Radio.list_contacts_involving_callsign(user.callsign, viewer)
 
+        monitors =
+          if viewer && viewer.id == user.id do
+            BeaconMonitors.list_monitors_for_user(user)
+          else
+            []
+          end
+
         {:ok,
          assign(socket,
            page_title: user.callsign,
            profile: user,
            contacts: contacts,
            beacons: beacons,
-           involving: involving
+           involving: involving,
+           beacon_monitors: monitors,
+           is_own_profile: viewer && viewer.id == user.id
          )}
     end
   end
@@ -155,6 +165,56 @@ defmodule MicrowavepropWeb.UserProfileLive do
         </div>
       </div>
 
+      <div :if={@is_own_profile} class="card bg-base-200 shadow-sm mb-6">
+        <div class="card-body">
+          <h2 class="card-title">Beacon monitors</h2>
+          <p class="text-sm opacity-70">
+            Remote monitor stations that report beacon reception data.
+          </p>
+
+          <%= if @beacon_monitors == [] do %>
+            <div class="flex items-center justify-between">
+              <p class="text-sm opacity-70">No monitors registered yet.</p>
+              <.link navigate={~p"/users/settings#beacon-monitors"} class="btn btn-primary btn-sm">
+                <.icon name="hero-plus" class="size-4" /> Register a monitor
+              </.link>
+            </div>
+          <% else %>
+            <div class="overflow-x-auto">
+              <table class="table table-zebra table-sm">
+                <thead>
+                  <tr>
+                    <th>Name</th>
+                    <th>Token</th>
+                    <th>Last seen</th>
+                  </tr>
+                </thead>
+                <tbody>
+                  <tr :for={monitor <- @beacon_monitors}>
+                    <td class="font-semibold">{monitor.name}</td>
+                    <td>
+                      <code class="text-xs select-all">…{String.slice(monitor.token, -8, 8)}</code>
+                    </td>
+                    <td class="text-sm opacity-70">
+                      <%= if monitor.last_seen_at do %>
+                        {Calendar.strftime(monitor.last_seen_at, "%Y-%m-%d %H:%M UTC")}
+                      <% else %>
+                        never
+                      <% end %>
+                    </td>
+                  </tr>
+                </tbody>
+              </table>
+            </div>
+            <div class="flex justify-end">
+              <.link navigate={~p"/users/settings#beacon-monitors"} class="btn btn-primary btn-sm">
+                <.icon name="hero-plus" class="size-4" /> Register another monitor
+              </.link>
+            </div>
+          <% end %>
+        </div>
+      </div>
+
       <div class="card bg-base-200 shadow-sm">
         <div class="card-body">
           <h2 class="card-title">Contacts {@profile.callsign} is in</h2>

test/microwaveprop_web/live/user_profile_live_test.exs

@@ -7,6 +7,7 @@ defmodule MicrowavepropWeb.UserProfileLiveTest do
   import Phoenix.LiveViewTest
 
   alias Microwaveprop.Accounts.User
+  alias Microwaveprop.BeaconMonitors
   alias Microwaveprop.Beacons
   alias Microwaveprop.Radio.Contact
   alias Microwaveprop.Repo
@@ -217,5 +218,52 @@ defmodule MicrowavepropWeb.UserProfileLiveTest do
 
       assert html =~ ~r/font-mono[^>]*>\s*W\s*</s
     end
+
+    test "anonymous visitors do not see beacon monitors section", %{conn: conn} do
+      user = user_fixture(%{callsign: "W5ISP"})
+
+      {:ok, _lv, html} = live(conn, ~p"/u/#{user.callsign}")
+
+      refute html =~ "Beacon monitors"
+      refute html =~ "No monitors registered yet"
+    end
+
+    test "another logged-in user does not see beacon monitors section", %{conn: conn} do
+      owner = user_fixture(%{callsign: "W5ISP"})
+      other = user_fixture(%{callsign: "W5OTH"})
+
+      conn = log_in_user(conn, other)
+      {:ok, _lv, html} = live(conn, ~p"/u/#{owner.callsign}")
+
+      refute html =~ "Beacon monitors"
+      refute html =~ "No monitors registered yet"
+    end
+
+    test "owners see empty-state when they have no beacon monitors", %{conn: conn} do
+      user = user_fixture(%{callsign: "W5ISP"})
+
+      conn = log_in_user(conn, user)
+      {:ok, _lv, html} = live(conn, ~p"/u/#{user.callsign}")
+
+      assert html =~ "Beacon monitors"
+      assert html =~ "No monitors registered yet"
+      assert html =~ "Register a monitor"
+    end
+
+    test "owners see their registered beacon monitors", %{conn: conn} do
+      user = user_fixture(%{callsign: "W5ISP"})
+
+      {:ok, monitor} = BeaconMonitors.create_monitor(user, %{name: "Shack Pi"})
+
+      conn = log_in_user(conn, user)
+      {:ok, _lv, html} = live(conn, ~p"/u/#{user.callsign}")
+
+      assert html =~ "Beacon monitors"
+      assert html =~ "Shack Pi"
+      assert html =~ "never"
+      assert html =~ "Register another monitor"
+      # Token is shown truncated (last 8 chars)
+      assert html =~ String.slice(monitor.token, -8, 8)
+    end
   end
 end