test(discovery): pin that the discovered list is a superset

The live complaint in one assertion: every app the user has, plus the curated
four, is offered — TiviMate, Wholphin, Netflix, YouTube, Kodi, Plex, Spotify
and an app only this device knows, with the launcher added and no system app
invented that `pm list packages -3` never reported.

tests/test_installed_apps.py

@@ -247,6 +247,35 @@ class TestDiscoverySweep:
             assert isinstance(row["name"], str) and row["name"]
             assert isinstance(row["icon"], str) and row["icon"]
 
+    async def test_the_live_bug_the_discovered_list_is_a_superset(self):
+        """The complaint in one assertion: every app the user has, plus the
+        curated four, is offered — not just the curated four."""
+        from nsh.const import DEFAULT_APP_DIRECTORY
+
+        poller = _DiscoveryPoller(dumps={"ar.tvplayer.tv": DUMP_TIVIMATE})
+        manager = _manager(poller)
+
+        rows = await manager.async_refresh_installed_apps()
+        packages = {row["package"] for row in rows}
+
+        # the curated list the integration used to fall back to
+        assert set(DEFAULT_APP_DIRECTORY) <= packages
+        # ...and the apps it missed, which is what the user reported
+        for package in (
+            "ar.tvplayer.tv",                          # TiviMate
+            "com.github.damontecres.wholphin",         # Wholphin
+            "com.netflix.ninja",                       # Netflix
+            "com.google.android.youtube.tv",           # YouTube
+            "org.xbmc.kodi",
+            "com.plexapp.android",
+            "com.spotify.tv.android",
+            "com.example.handmade",
+        ):
+            assert package in packages, package
+        assert "com.google.android.tvlauncher" in packages  # + the launcher
+        # a system app the device never lists as -3 is NOT invented here
+        assert "com.android.systemui" not in packages
+
     async def test_the_sweep_issues_the_documented_commands(self):
         poller = _DiscoveryPoller(dumps={"ar.tvplayer.tv": DUMP_TIVIMATE})
         manager = _manager(poller)