v4.2.4: full Kali sandbox orchestration for recon

Spin Kali up for the engagement, run tool-recon in it, let the LLM refine on top,
tear it down after.

- kali_provision_recon_tools(): installs the recon toolbox (subfinder/httpx/
  katana/gau/waybackurls/nuclei/naabu/dnsx/assetfinder/gf/qsreplace/anew via
  go install + apt) in the Kali sandbox on demand, idempotent, once per run.
- kali_tool_recon(): deterministic tool-recon phase — gau/waybackurls/katana URL
  harvest + targeted nuclei (exposures/misconfig/takeovers, high-signal only) +
  gf-flagged candidate URLs by class — over the live hosts, then folded into the
  recon context so the LLM works on top of the tool output and confirms each.
  Runs in the sandbox (--sandbox) or on host tools via recon_tool().
- Engine autostart: if the container engine is installed but not running, start
  it automatically (colima start / open -a Docker / systemctl start docker /
  podman machine start) and poll until up — a --sandbox run no longer fails just
  because the daemon wasn't started. Clear guidance if it can't be started.
- Teardown: the Kali container is removed at the end of the run (override with
  NEUROSPLOIT_KEEP_SANDBOX=1).

Version 4.2.4 across CLI/clap/web/README/TUTORIAL. 423 tests.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/server.js

@@ -1,7 +1,7 @@
 #!/usr/bin/env node
 'use strict';
 /**
- * NeuroSploit v4.2.3 — web console backend.
+ * NeuroSploit v4.2.4 — web console backend.
  *
  * Zero-dependency Node HTTP server that:
  *  - serves the static SPA in ./public
@@ -1487,7 +1487,7 @@ const server = http.createServer(async (req, res) => {
     }
 
     if (req.method === 'GET' && p === '/api/meta') {
-      return sendJson(res, 200, { version: "4.2.3", binary: BIN, root: ROOT });
+      return sendJson(res, 200, { version: "4.2.4", binary: BIN, root: ROOT });
     }
 
     // ---- providers / API keys (in-memory only, never persisted) ----
@@ -1521,7 +1521,7 @@ const server = http.createServer(async (req, res) => {
 loadPersistedJobs();
 
 server.listen(PORT, () => {
-  console.log(`NeuroSploit v4.2.3 web console → http://localhost:${PORT}`);
+  console.log(`NeuroSploit v4.2.4 web console → http://localhost:${PORT}`);
   console.log(`  binary : ${BIN || '(not found — build neurosploit-rs first)'}`);
   console.log(`  agents : ${AGENTS_DIR}`);
   console.log(`  runs   : ${RUNS_DIR}`);