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>

Dockerfile

@@ -5,6 +5,16 @@
 # Production-ready with security best practices
 # ===================================
 
+# Stage 0: Frontend build (Track G — Vite + React SPA → core/templates/static/dist)
+FROM node:20-alpine AS frontend
+WORKDIR /web
+COPY web/package.json web/package-lock.json* ./
+RUN npm ci --no-audit --no-fund || npm install --no-audit --no-fund
+COPY web/ ./
+COPY core/templates/static/logo.svg ./public/logo.svg
+RUN npm run build
+
+
 # Stage 1: Build stage
 FROM python:3.12-alpine AS builder
 
@@ -46,6 +56,11 @@ COPY --from=builder /root/.local /home/appuser/.local
 # Copy application code
 COPY --chown=appuser:appgroup . .
 
+# Overlay the SPA build output (from stage 0) into the templates static dir.
+# Vite already targets core/templates/static/dist when run locally; in Docker
+# we build inside the frontend stage and copy the result here.
+COPY --from=frontend --chown=appuser:appgroup /core/templates/static/dist /app/core/templates/static/dist
+
 # Create data directories for API keys and logs with correct ownership
 # This must be done before switching to non-root user
 RUN mkdir -p /app/data /app/logs && \