Import remaining project documentation and reference notes

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.

app/README!.md

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+# Project: Teknav-X
+
+Teknav-X is a full-stack Persian RTL publication stack. The frontend is Vite/React, the backend is Fastify/TypeScript, and production runs natively on Linux with PostgreSQL, Redis, nginx, and systemd.
+
+Current state: Phase 15 is implemented; Phase 14 Linux production validation remains the main launch gate. The live surface includes SEO topic hubs, glossary pages, Q&A, reader retention flows, auth trust features, jobs/courses pages, monetization foundations, push notifications, revision history, web stories, comparison pages, company directory pages, embeddable widgets, and production-readiness preflight checks.
+
+## Start Here
+
+- `ARCH.md` for current work and next steps
+- `PHASE10.md` for the active roadmap
+- `DEPLOY.md` for native Debian production setup
+- `SECURITY.md` for hardening and safety rules
+- `AGENTS.md` for agent-facing file guidance
+
+## Core Layout
+
+- Frontend: repo root `*.jsx` files plus `src/`
+- Backend: `backend/`
+- Static assets: `public/`
+- Generated SEO artifacts: `public/sitemap.xml`, `public/robots.txt`, `public/feed.xml`
+
+## Main Commands
+
+- `npm run dev`
+- `npm run build`
+- `npm run preflight:prod`
+- `npm run seo:sitemap`
+- `npm run og:images`
+- `cd backend && npm run dev`
+- `cd backend && npm run build`
+- `cd backend && npm test`