Show provider tags on watchlist

test_app.py

@@ -1620,6 +1620,28 @@ class WatchlistCompletionTests(unittest.TestCase):
         self.assertIn("Sub ready.", message)
         self.assertNotIn("Dub ready.", message)
 
+    def test_watchlist_item_exposes_provider_label_from_added_provider(self):
+        with mock.patch.object(APP.WATCHLIST, "schedule_refresh", side_effect=lambda show_id, source="manual": APP.WATCHLIST.get(show_id)):
+            result = APP.WATCHLIST.add(
+                {
+                    "show_id": "providerless-show",
+                    "provider": "anineko",
+                    "title": "Provider Show",
+                    "category": "watching",
+                }
+            )
+
+        self.assertEqual(result["item"]["provider"], "anineko")
+        self.assertEqual(result["item"]["provider_label"], "AniNeko")
+
+    def test_watchlist_item_derives_provider_label_from_prefixed_show_id(self):
+        self.seed_watchlist_item(show_id="pahe:provider-show", title="Provider Show")
+
+        item = APP.WATCHLIST.get("pahe:provider-show")
+
+        self.assertEqual(item["provider"], "pahe")
+        self.assertEqual(item["provider_label"], "AnimePahe")
+
     def test_refresh_persists_expected_episode_total_and_ready_flags(self):
         self.seed_watchlist_item()
 
@@ -4062,6 +4084,10 @@ class TemplateHelperTests(unittest.TestCase):
         self.assertIn("const isFullyReady = item.sub_complete && item.dub_complete;", APP.WATCHLIST_HTML)
         self.assertIn("card.className = watchlistCardClassName(item);", APP.WATCHLIST_HTML)
 
+    def test_watchlist_page_renders_provider_source_tag(self):
+        self.assertIn("function providerLabel(provider)", APP.WATCHLIST_HTML)
+        self.assertIn('appendStatusTag(statusRow, `Source: ${item.provider_label || providerLabel(item.provider)}`);', APP.WATCHLIST_HTML)
+
     def test_watchlist_page_download_all_replaces_open_action(self):
         self.assertIn("Download all", APP.WATCHLIST_HTML)
         self.assertIn('api("/api/watchlist/download-all"', APP.WATCHLIST_HTML)