feat: ACN Application Security Standard V7.30 compliance (19/23 items)

CRITICAL — Authentication & Access:
- TOTP MFA: otpauth-based, QR setup UI, sign-in flow integration,
  admin disable override, /account/security self-service page
- Session Timeouts: 8h absolute (maxAge), 30min idle (updateAge)
- Failed Auth Logging: Pino warn for invalid password/user/totp,
  info for successful login, audit entries for all auth events
- Concurrent Session Limit: ActiveSession model, oldest-kick strategy,
  max 3 per user (configurable in SystemSettings)

CRITICAL — HTTP Security:
- HSTS: max-age=31536000; includeSubDomains
- CSP: script/style/img/font/connect-src with Gemini/OpenAI whitelist
- X-XSS-Protection: 0 (CSP replaces legacy)
- Auth page cache: no-store, no-cache, must-revalidate
- Rate Limiting: 100/15min general API, 5/15min auth (Map-based)

Data Protection:
- XSS Sanitization: DOMPurify on comment bodies
- autocomplete="new-password" on all password/secret fields
- SameSite=Strict on all cookies (Credentials-only, no OAuth)
- File Upload Magic Bytes validation (PNG/JPEG/WebP/GIF/BMP/TIFF)

Logging & Monitoring:
- Login/Logout audit entries (Auth entityType)
- External API call logging with timing (OpenAI, Gemini)
- Input validation failure logging at warn level
- Concurrent session tracking in ActiveSession table

Documentation:
- docs/security-architecture.md (11 sections)
- docs/sdlc.md (CI pipeline, security gates, incident response)
- .gitea/PULL_REQUEST_TEMPLATE.md (security checklist)

Schema: User.totpSecret/totpEnabled, SystemSettings.sessionMaxAge/
sessionIdleTimeout/maxConcurrentSessions, ActiveSession model

Tests: 310 engine + 37 staffing pass. TypeScript clean.

Co-Authored-By: claude-flow <ruv@ruv.net>

apps/web/package.json

@@ -11,16 +11,16 @@
     "test:e2e": "playwright test"
   },
   "dependencies": {
-    "@dnd-kit/core": "^6.3.1",
-    "@dnd-kit/sortable": "^10.0.0",
-    "@dnd-kit/utilities": "^3.2.2",
-    "@node-rs/argon2": "^2.0.2",
     "@capakraken/api": "workspace:*",
     "@capakraken/application": "workspace:*",
     "@capakraken/db": "workspace:*",
     "@capakraken/engine": "workspace:*",
     "@capakraken/shared": "workspace:*",
     "@capakraken/ui": "workspace:*",
+    "@dnd-kit/core": "^6.3.1",
+    "@dnd-kit/sortable": "^10.0.0",
+    "@dnd-kit/utilities": "^3.2.2",
+    "@node-rs/argon2": "^2.0.2",
     "@react-pdf/renderer": "^4.3.2",
     "@sentry/nextjs": "^10.45.0",
     "@tanstack/react-query": "^5.62.16",
@@ -29,9 +29,11 @@
     "@trpc/react-query": "^11.0.0",
     "@trpc/server": "^11.0.0",
     "clsx": "^2.1.1",
+    "dompurify": "^3.3.3",
     "framer-motion": "^12.38.0",
     "next": "^15.1.7",
     "next-auth": "^5.0.0-beta.25",
+    "otpauth": "^9.5.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-force-graph-3d": "^1.29.1",
@@ -46,6 +48,7 @@
   "devDependencies": {
     "@capakraken/tsconfig": "workspace:*",
     "@playwright/test": "^1.49.1",
+    "@types/dompurify": "^3.2.0",
     "@types/node": "^22.10.2",
     "@types/react": "^19.0.6",
     "@types/react-dom": "^19.0.3",