Release 3.8.2.1: reliability, UI probe/logs, CI, signing gates.

Clear sysproxy on core death; probe+reconnect; subscription prune;
Best ignores soft UDP; Windows tray; Android protocol gate; CI workflows.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/appui/app.css

@@ -801,3 +801,18 @@
       .tools { grid-template-columns: 1fr; }
     }
   
+
+    .log-tail {
+      max-height: 160px;
+      overflow: auto;
+      font-size: .72rem;
+      line-height: 1.35;
+      white-space: pre-wrap;
+      word-break: break-word;
+      background: var(--panel-bg, rgba(0,0,0,.04));
+      border: 1px solid var(--line);
+      border-radius: 10px;
+      padding: 10px 12px;
+      margin: 8px 0;
+    }
+    .row-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }