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/src/components/comments/CommentThread.tsx

@@ -5,6 +5,7 @@ import { clsx } from "clsx";
 import { trpc } from "~/lib/trpc/client.js";
 import { ConfirmDialog } from "~/components/ui/ConfirmDialog.js";
 import { CommentInput } from "./CommentInput.js";
+import { sanitizeHtml } from "~/lib/sanitize.js";
 
 interface CommentAuthor {
   id: string;
@@ -72,21 +73,22 @@ function AuthorAvatar({ author }: { author: CommentAuthor }) {
  * Transforms @[Name](userId) into styled spans.
  */
 function CommentBody({ body }: { body: string }) {
+  const cleanBody = sanitizeHtml(body);
   const parts: Array<{ type: "text" | "mention"; value: string }> = [];
   const regex = /@\[([^\]]+)\]\([^)]+\)/g;
   let lastIndex = 0;
   let match: RegExpExecArray | null;
 
-  while ((match = regex.exec(body)) !== null) {
+  while ((match = regex.exec(cleanBody)) !== null) {
     if (match.index > lastIndex) {
-      parts.push({ type: "text", value: body.slice(lastIndex, match.index) });
+      parts.push({ type: "text", value: cleanBody.slice(lastIndex, match.index) });
     }
     parts.push({ type: "mention", value: `@${match[1]}` });
     lastIndex = match.index + match[0].length;
   }
 
-  if (lastIndex < body.length) {
-    parts.push({ type: "text", value: body.slice(lastIndex) });
+  if (lastIndex < cleanBody.length) {
+    parts.push({ type: "text", value: cleanBody.slice(lastIndex) });
   }
 
   return (