feat(v3.13.0): settings live DB reads, remove Directus/Appwrite, admin stats

Settings fixes:
- MAX_SITES_PER_USER, USER_RATE_LIMIT_PER_MIN/HR now read from DB settings
  table (DB > ENV > default), so dashboard/settings changes apply without
  restart. Sync cache refreshed on every save or delete.
- /api/me reports the live DB value for max_sites_per_user.

Admin improvements:
- Admin users bypass per-user rate limiting entirely (role=admin or ADMIN_EMAILS).
- Admin Overview now shows platform stats: registered users, new users (7d),
  total user sites, available tools.

Plugin cleanup:
- Appwrite and Directus plugins removed from the active registry (8 plugins
  now: WordPress, WooCommerce, WordPress Specialist, Gitea, n8n, Supabase,
  OpenPanel, Coolify). Plugin code is retained for future re-enabling.
- Settings page plugin visibility list updated to match.

Mobile onboarding:
- Stepper steps on narrow viewports stack vertically with correct full border
  and rounded corners on each step.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -14,6 +14,14 @@ build/
 *.egg
 MANIFEST
 
+# Track G — preserve the SPA dist directory placeholder (so package_data can
+# pick it up) but ignore the actual build output, which is regenerated by
+# `cd web && npm run build` or the Dockerfile's frontend stage.
+!core/templates/static/dist/
+!core/templates/static/dist/.gitkeep
+core/templates/static/dist/*
+!core/templates/static/dist/.gitkeep
+
 # Virtual environments
 venv/
 env/
@@ -170,3 +178,17 @@ uv.lock
 task_plan.md
 findings.md
 progress.md
+
+# wp.org SVN working copies (separate VCS, not for git):
+# - airano-mcp-bridge-wporg-svn/    → new slug `airano-mcp-bridge` (current)
+# - airano-mcp-seo-bridge-svn/      → old slug `airano-mcp-seo-bridge` (deprecated, migration release lives here)
+# - airano-mcp-bridge-svn/          → legacy stub from earlier exploration
+wordpress-plugin/airano-mcp-bridge-svn/
+wordpress-plugin/airano-mcp-bridge-wporg-svn/
+wordpress-plugin/airano-mcp-seo-bridge-svn/
+
+# Screenshot harness auth state — never commit (contains session cookie)
+screenshots/.auth-state.json
+screenshots/_*.json
+# wp.org SVN working copy for the airano-mcp-bridge plugin (separate VCS, not for git)
+wordpress-plugin/airano-mcp-bridge-svn/