Treat missing CDN/WebTorrent sources as offline

js/subscriptions.js

@@ -474,13 +474,25 @@ class SubscriptionsManager {
           delete cardEl.dataset.ownerPubkey;
         }
 
-        cardEl.dataset.urlHealthState = trimmedUrl ? "checking" : "absent";
+        if (trimmedUrl) {
+          cardEl.dataset.urlHealthState = "checking";
+          if (cardEl.dataset.urlHealthReason) {
+            delete cardEl.dataset.urlHealthReason;
+          }
+        } else {
+          cardEl.dataset.urlHealthState = "offline";
+          cardEl.dataset.urlHealthReason = "missing-source";
+        }
         if (magnetProvided && magnetSupported) {
           cardEl.dataset.streamHealthState = "checking";
-        } else if (magnetProvided) {
-          cardEl.dataset.streamHealthState = "unsupported";
+          if (cardEl.dataset.streamHealthReason) {
+            delete cardEl.dataset.streamHealthReason;
+          }
         } else {
-          cardEl.dataset.streamHealthState = "absent";
+          cardEl.dataset.streamHealthState = "unhealthy";
+          cardEl.dataset.streamHealthReason = magnetProvided
+            ? "unsupported"
+            : "missing-source";
         }
 
         // Leave the data-play-* attributes empty in the literal markup so we can