Downloads: fix collapsed-batch overflow (#814) + Retry Failed result feedback (#815)

#814 — the collapsed Batches rail (44px) hid .adl-batch-active and
.adl-batch-history-section but NOT the JS-rendered .adl-batch-summary line
("N batches · M downloading · …"), so it overflowed as clipped text. Added it
to the collapsed hide rule.

#815 — "Retry Failed" only toasted "Retrying N…" at the start and a generic
"Discovery complete!" at the end, with no sense of how many of the retried
tracks actually progressed. retryFailedMirroredDiscovery now stamps a baseline
(matches-before + retry count) on the state, and a shared completion toast
reports "Retry complete: X of N newly found[, Y still not found]" instead of
the generic message. Normal (non-retry) discovery still shows "Discovery
complete!".

JS syntax clean, 70 script-split/style tests pass.

webui/static/stats-automations.js

@@ -1678,6 +1678,12 @@ async function retryFailedMirroredDiscovery(urlHash) {
             state.phase = 'discovering';
             state.status = 'discovering';
             state.discovery_progress = 0;
+            // #815: stamp a baseline so the completion toast can report how many
+            // of these retried tracks were newly found (not just overall matched).
+            state._retryDiscovery = {
+                matchesBefore: state.spotify_matches || 0,
+                retryCount: data.retry_count,
+            };
         }
 
         // Update modal buttons to show discovering state

webui/static/style.css

@@ -59389,7 +59389,11 @@ body.reduce-effects #page-particles-canvas {
 }
 
 .adl-batch-panel.collapsed .adl-batch-active,
-.adl-batch-panel.collapsed .adl-batch-history-section {
+.adl-batch-panel.collapsed .adl-batch-history-section,
+/* The active-batches summary line ("N batches · M downloading · …") is shown
+   via JS and was NOT hidden on collapse, so it overflowed the 44px rail as
+   clipped text (#814). Hide it with the rest of the panel body. */
+.adl-batch-panel.collapsed .adl-batch-summary {
     display: none;
 }
 

webui/static/sync-services.js

@@ -9248,6 +9248,24 @@ async function startYouTubeDiscovery(urlHash) {
     }
 }
 
+// Discovery-complete toast. For a "Retry Failed" run (#815) it reports how many
+// of the retried tracks were newly found this attempt, instead of the generic
+// message — the baseline is stamped on the state by retryFailedMirroredDiscovery.
+function _discoveryCompleteToast(urlHash) {
+    const st = youtubePlaylistStates[urlHash];
+    const retry = st && st._retryDiscovery;
+    if (retry) {
+        const found = Math.max(0, (st.spotify_matches || 0) - (retry.matchesBefore || 0));
+        const stillFailed = Math.max(0, (retry.retryCount || 0) - found);
+        delete st._retryDiscovery;
+        let msg = `Retry complete: ${found} of ${retry.retryCount} newly found`;
+        if (stillFailed > 0) msg += `, ${stillFailed} still not found`;
+        showToast(msg, found > 0 ? 'success' : 'info');
+        return;
+    }
+    showToast('Discovery complete!', 'success');
+}
+
 function startYouTubeDiscoveryPolling(urlHash) {
     // Stop any existing polling
     if (activeYouTubePollers[urlHash]) {
@@ -9274,7 +9292,7 @@ function startYouTubeDiscoveryPolling(urlHash) {
                 if (st) st.phase = 'discovered';
                 updateYouTubeCardPhase(urlHash, 'discovered');
                 updateYouTubeModalButtons(urlHash, 'discovered');
-                showToast('Discovery complete!', 'success');
+                _discoveryCompleteToast(urlHash);
             }
         };
     }
@@ -9322,7 +9340,7 @@ function startYouTubeDiscoveryPolling(urlHash) {
                 updateYouTubeModalButtons(urlHash, 'discovered');
 
                 console.log('✅ Discovery complete:', urlHash);
-                showToast('Discovery complete!', 'success');
+                _discoveryCompleteToast(urlHash);
             }
 
         } catch (error) {