Address SonarQube security hotspots on the website:
- server/src/app.js: replace `contentSecurityPolicy: false` with a helmet CSP
tuned for the built React SPA (script-src 'self'; style-src adds 'unsafe-inline'
for React inline styles + the Google Fonts stylesheet; font-src gstatic; img-src
allows data:/https: for uploads, embedded body images and BRAND_* assets;
connect-src 'self' for REST+SSE). upgrade-insecure-requests is intentionally
omitted (TLS terminates at the proxy; keeps local `npm start` over http working).
The /api/docs Swagger UI route gets a scoped looser policy (inline script/style)
since swagger-ui-express injects an inline bootstrap.
- client/vite.config.js: disable the inline module-preload polyfill so code-split
builds keep `script-src 'self'` valid (RichTextEditor is a separate chunk).
- bot/src/app.js, server/src/internalApp.js: disable x-powered-by on the two
internal-only listeners (the public app already strips it via helmet).
- shardEvents dedupe key: SHA-1 -> SHA-256 truncated to 40 hex chars (fits the
existing CHAR(40) column, no migration; it is a content fingerprint, not a
security value). schema.sql comment updated to match.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NgyHnrNa8WwG3doxvxjuCr
