Prepare the repository for a public release

- docs/deployment.md: step-by-step Docker deployment for anyone (setup,
  configuration, LAN/HTTPS/VPN access, adding manga, operation, prebuilt
  images, backups, peering, troubleshooting, rules for agents).
- deploy/circus.sh: host helper without Node (status, up/down with queue
  pause, logs, pause/resume, update, rescan, restore-test); deploy/compose.https.yml
  + Caddyfile for automatic HTTPS.
- README rewritten for public readers (Docker first, sources/copyright note,
  docs index); AGENTS.md + CLAUDE.md for contributors and coding agents.
- Removed notes about one particular installation (Windows host, handoffs,
  audits of a private library, benchmarks with local paths, wishlist, reading
  map) and the unused ops/proxmox templates; generalized remaining mentions of
  hosts, VPN and Windows-only commands.
- Defaults: TZ and reading time zone UTC; .gitattributes keeps shell/YAML LF.
- Personal agent coordination files are git-ignored (CLAUDE.local.md,
  .claude/skills/manga-org/).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/settings-navigation.md

@@ -73,8 +73,8 @@ not an editor for Docker environment variables or an unrestricted restart consol
 `npm test` covers route defaults, deep links, ownership and existing service/API
 behavior. `node tools/test-compose.js --settings-ui` adds optional Playwright
 headless browser QA against the disposable Compose fixture, never the real user
-database or queue. Make Playwright available on the development machine; Windows
-uses installed headless Edge by default, overridable with `QA_BROWSER_CHANNEL`.
+database or queue. Make Playwright available on the development machine; on Windows it
+uses the installed headless Edge by default, overridable with `QA_BROWSER_CHANNEL`.
 The application itself remains dependency-free.
 
 The UI check verifies desktop and 390×844 mobile navigation, form saves, draft