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>

dist/navis-release/darwin-arm64/Navis.version

@@ -1 +1 @@
-3.8.1+1
+3.8.2+1

dist/navis-release/darwin-arm64/VERSION

@@ -1 +1 @@
-3.8.1.1
+3.8.2.1