release: bump version to 0.27.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/public/earth/js/tv.js

@@ -512,8 +512,8 @@ function resolveInitialSourceId() {
 }
 
 function renderPanel() {
-  renderSourceOptions();
   currentSourceId = resolveInitialSourceId();
+  renderSourceOptions();
   renderSource(findSourceById(currentSourceId));
 }