Record that downloads fill the Cache and ship the built app.

A failed open can repair the shell, and the installed PWA matches Ziele, Einstellungen, and the view download.

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

src/style.css

@@ -231,11 +231,27 @@ button:disabled {
   color: #e7e1d4;
 }
 
-.boot-error {
+.boot-failure {
   margin: 24px 16px;
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 12px;
+  max-width: 28rem;
   color: #e7e1d4;
 }
 
+.boot-failure .boot-error,
+.boot-failure p {
+  margin: 0;
+}
+
+.boot-detail {
+  font-family: ui-monospace, SFMono-Regular, monospace;
+  font-size: 14px;
+  overflow-wrap: anywhere;
+}
+
 [hidden] {
   display: none !important;
 }