Release 4.0.0+1: rebrand Navis → EvilFox; centralized Remnawave auto-provisioning (panel credentials baked into binary); remove Remnawave API UI; Windows 4.0.0.1.

Keep dist/navis-release/ path and ship Navis.exe as a same-hash alias of EvilFox.exe so 3.x clients can still update from the Windows branch feed.

cmd/vpnapp/main_other.go

@@ -8,7 +8,7 @@ import (
 )
 
 func main() {
-	fmt.Fprintln(os.Stderr, "Navis GUI supports Windows (WebView2) and macOS.")
-	fmt.Fprintln(os.Stderr, "On this OS use the CLI: ./Navis connect | install-core | check-update")
+	fmt.Fprintln(os.Stderr, "EvilFox GUI supports Windows (WebView2) and macOS.")
+	fmt.Fprintln(os.Stderr, "On this OS use the CLI: ./evilfox-cli connect | install-core | check-update")
 	os.Exit(1)
 }