release: v4.8.10 user-configurable STUN/TURN servers

- add header gear + connection-screen entry points to Advanced network settings
- render the ICE settings modal at the app root (reachable from any screen via event)
- remove the standalone relay-only toggle/description from the start screen
  (relay-only now lives in the advanced settings panel)
- fix crash from referencing main-component state inside EnhancedConnectionSetup
- bump version to 4.8.10 across header, manifest, README, init message, disclaimer
- document the feature in CHANGELOG and README

dist/app-boot.js

@@ -17481,7 +17481,7 @@ Right-click or Ctrl+click to disconnect`,
             React.createElement("p", {
               key: "subtitle",
               className: "text-xs sm:text-sm text-muted hidden sm:block"
-            }, "End-to-end freedom v4.8.9")
+            }, "End-to-end freedom v4.8.10")
           ])
         ]),
         // Status and Controls - Responsive
@@ -17489,6 +17489,16 @@ Right-click or Ctrl+click to disconnect`,
           key: "status-section",
           className: "flex items-center space-x-2 sm:space-x-3"
         }, [
+          React.createElement("button", {
+            key: "network-settings",
+            type: "button",
+            onClick: () => window.dispatchEvent(new CustomEvent("securebit:open-network-settings")),
+            title: "Advanced network settings (STUN/TURN)",
+            "aria-label": "Advanced network settings",
+            className: "w-8 h-8 rounded-full flex items-center justify-center text-muted hover:text-primary hover:bg-white/5 transition-colors duration-200"
+          }, [
+            React.createElement("i", { key: "i", className: "fas fa-network-wired text-sm" })
+          ]),
           displaySecurityLevel && React.createElement("div", {
             key: "security-level",
             className: "hidden md:flex items-center space-x-2 cursor-pointer hover:opacity-80 transition-opacity duration-200",