many changes

src/lib/stores/connectivity.ts

@@ -2,6 +2,7 @@
 //
 // Simplified wrapper over Rust connectivity monitor.
 // The Rust backend handles all polling, reachability checks, and adaptive intervals.
+// TRACES: UR-002 | DR-013
 
 import { writable, derived } from "svelte/store";
 import { browser } from "$app/environment";