fix: fallback for crypto.randomUUID in non-secure HTTP contexts

crypto.randomUUID() is only available over HTTPS or localhost.
Accessing the app via plain HTTP on a local IP (e.g. 192.168.x.x)
caused an uncaught TypeError at module load time, crashing the app
and resulting in a black screen.

Added a Math.random() fallback for non-secure contexts.

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

Author: ceotjoe

src/components/MeshtasticPanel.jsx

@@ -18,7 +18,10 @@ function getMeshSessionId() {
     id = localStorage.getItem(key);
   } catch {}
   if (id && /^[a-zA-Z0-9_-]{8,64}$/.test(id)) return id;
-  id = crypto.randomUUID().replace(/-/g, '').slice(0, 32);
+  id =
+    typeof crypto.randomUUID === 'function'
+      ? crypto.randomUUID().replace(/-/g, '').slice(0, 32)
+      : Array.from({ length: 32 }, () => Math.floor(Math.random() * 16).toString(16)).join('');
   try {
     localStorage.setItem(key, id);
   } catch {}