fix: AIUI /aiui/ base path, nginx alias cycle, VPN auth, container boot

- AIUI: rebuild with /aiui/ base path (router, chunk loader, SW scope)
- nginx: remove alias from /aiui/ location (caused try_files redirect cycle)
- VPN: WireGuard standalone setup, auth improvements
- ISO: build script hardening, service file updates
- first-boot-containers: networking stack fixes

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

core/archipelago/src/api/rpc/auth.rs

@@ -32,6 +32,26 @@ impl RpcHandler {
         }
 
         tracing::info!("[onboarding] login successful");
+
+        // Ensure NostrVPN config exists — covers the case where onboardingComplete
+        // was never called (e.g., user took the "already set up" shortcut).
+        let data_dir = self.config.data_dir.clone();
+        tokio::spawn(async move {
+            // Quick check: if config.toml already exists, skip
+            let config_path = data_dir.join("nostr-vpn/.config/nvpn/config.toml");
+            if config_path.exists() {
+                return;
+            }
+            // Identity must exist for VPN config
+            if !data_dir.join("identity/nostr_pubkey").exists() {
+                return;
+            }
+            match crate::vpn::configure_nostr_vpn(&data_dir).await {
+                Ok(()) => tracing::info!("[login] NostrVPN auto-configured on first login"),
+                Err(e) => tracing::debug!("[login] NostrVPN auto-config skipped: {}", e),
+            }
+        });
+
         Ok(serde_json::Value::Null)
     }