feat: vulnerability-research mode — hand it a repo, it hunts a novel CVE

New --research mode for whitebox/greybox (REPL /research, web 🔬 checkbox, or
auto-detected from natural-language focus/objective in PT/EN). Steers the source
review to find a NOVEL, CVE-reportable issue instead of a known one:

- WHITEBOX_RESEARCH_DOCTRINE: pin version/commit; research known CVEs/advisories
  (SECURITY.md, CHANGELOG, GHSA, NVD, git history) to de-duplicate; patch-diff /
  n-day->0-day variant analysis (incomplete fixes, bypasses of a new check,
  sibling sinks, reintroductions); strict novelty gate (each finding states
  novel-why + checked-against); benign PoC + dynamic confirm on greybox.
- RunConfig.research + is_research_intent(); injected in run_whitebox and the
  greybox code-review half.
- 6 research skills (code/): known_cve_dedup, patch_diff_variant,
  attack_surface_map, source_to_sink_taint, logic_authz_flaw,
  dependency_nday_reachability.
- Methodology modeled on a real AppSec-research workflow (no specifics copied).

479 agents, 421 tests.

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

web/public/app.js

@@ -533,6 +533,7 @@ async function startExploitation() {
     chainDepth: Number($('#fieldChain').value),
     recon: Number($('#fieldRecon').value),
     quick: $('#fieldQuick') ? $('#fieldQuick').checked : false,
+    research: $('#fieldResearch') ? $('#fieldResearch').checked : false,
     subscription: state.authMode === 'subscription',
     mcp: $('#fieldMcp').checked,
     agents: [...state.selected],