fix: container orchestration stability, AIUI inclusion, lnd-ui port, version 1.3.0

Container stability:
- Merge scan results instead of full replacement (prevents UI flapping)
- Absence threshold: 3 consecutive missed scans before removing from state
- container-list RPC uses cached scanner state for consistency
- Increased Podman API timeout 30s → 60s (scanner + health monitor)
- Keep crashed containers visible as "exited" instead of podman rm -f
- Resolve host-gateway IP via ip route (podman 4.3.x compatibility)

ISO build fixes:
- AIUI web app inclusion: searches 5 paths + CI step to copy from build server
- Claude API proxy: systemctl enable with symlink fallback
- AIUI nginx: try_files =404 (was /aiui/index.html redirect loop)
- Build version set to 1.3.0

Container fixes:
- lnd-ui: nginx listens on 8080 (was 80, Permission denied in rootless)
- first-boot: image-versions.sh sourced from correct path with validation
- first-boot: host-gateway resolved to actual gateway IP

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

core/archipelago/src/api/rpc/package/install.rs

@@ -192,7 +192,9 @@ impl RpcHandler {
         }
 
         // DNS: ensure host.containers.internal resolves (needed for Tor proxy, inter-service calls)
-        run_args.push("--add-host=host.containers.internal:host-gateway");
+        // Rootless podman 4.3.x doesn't support "host-gateway" — resolve to actual gateway IP
+        let host_gateway_flag = resolve_host_gateway().await;
+        run_args.push(&host_gateway_flag);
 
         // Security hardening (skip for privileged containers)
         let security_caps: Vec<String> = if !is_tailscale {
@@ -340,6 +342,8 @@ impl RpcHandler {
                 }
                 if state == "exited" {
                     // Container crashed immediately — get logs for diagnosis
+                    // Keep the container (don't rm) so it shows as "exited" in My Apps
+                    // instead of vanishing completely. User can retry or remove manually.
                     let logs = tokio::process::Command::new("podman")
                         .args(["logs", "--tail", "20", container_name])
                         .output()
@@ -351,11 +355,7 @@ impl RpcHandler {
                             format!("{}{}", stdout, stderr)
                         })
                         .unwrap_or_default();
-                    install_log(&format!("INSTALL CRASH: {} — container exited. Logs:\n{}", package_id, &log_output.chars().take(1000).collect::<String>())).await;
-                    let _ = tokio::process::Command::new("podman")
-                        .args(["rm", "-f", container_name])
-                        .output()
-                        .await;
+                    install_log(&format!("INSTALL CRASH: {} — container exited (kept for visibility). Logs:\n{}", package_id, &log_output.chars().take(1000).collect::<String>())).await;
                     return Err(anyhow::anyhow!(
                         "Container {} exited immediately after start. Logs: {}",
                         container_name,
@@ -936,3 +936,39 @@ autopilot.active=false\n",
         Ok(serde_json::json!({ "token": token }))
     }
 }
+
+/// Resolve the host gateway IP for --add-host flag.
+/// Podman 4.3.x (Debian 12) doesn't support "host-gateway" in rootless mode,
+/// so we resolve the default gateway IP from the routing table.
+async fn resolve_host_gateway() -> String {
+    // Try `ip route` to get the default gateway
+    if let Ok(output) = tokio::process::Command::new("ip")
+        .args(["route", "show", "default"])
+        .output()
+        .await
+    {
+        let stdout = String::from_utf8_lossy(&output.stdout);
+        for line in stdout.lines() {
+            if line.starts_with("default") {
+                if let Some(gw) = line.split_whitespace().nth(2) {
+                    if !gw.is_empty() {
+                        return format!("--add-host=host.containers.internal:{}", gw);
+                    }
+                }
+            }
+        }
+    }
+    // Fallback: try hostname -I (first IP)
+    if let Ok(output) = tokio::process::Command::new("hostname")
+        .args(["-I"])
+        .output()
+        .await
+    {
+        let stdout = String::from_utf8_lossy(&output.stdout);
+        if let Some(ip) = stdout.split_whitespace().next() {
+            return format!("--add-host=host.containers.internal:{}", ip);
+        }
+    }
+    // Last resort
+    "--add-host=host.containers.internal:10.0.2.2".to_string()
+}