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Reorganize docs into en/ru trees with proofread bilingual content. Move canonical English to docs/en/, Russian editions to docs/ru/, remove legacy UPPER_CASE redirect stubs, update README and repo links, and add docs-audit tooling plus refreshed context pack. Co-authored-by: Cursor <cursoragent@cursor.com>
Harden platform security after audit: auth, WebSocket, SQL, and deploy. Disable X-ISPF-Role bypass by default, add login lockout, secure WebSocket auth without query tokens, read-only external SQL, XSS sanitization, sessionStorage migration, prod env flags in deploy script, and Dependabot. Co-authored-by: Cursor <cursoragent@cursor.com>