fix: build editor in Docker and restore admin panel content

The editor.js/editor.css were gitignored and never built during docker
build, causing 404s on the edit page. Add a Node multi-stage build step
to compile them. Also replace "nowt" placeholder in admin templates with
the actual main panel include.

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

Dockerfile

@@ -1,5 +1,14 @@
 # syntax=docker/dockerfile:1
 
+# ---------- Stage 1: Build editor JS/CSS ----------
+FROM node:20-slim AS editor-build
+WORKDIR /build
+COPY shared_lib/editor/package.json shared_lib/editor/package-lock.json* ./
+RUN npm ci --ignore-scripts 2>/dev/null || npm install
+COPY shared_lib/editor/ ./
+RUN NODE_ENV=production node build.mjs
+
+# ---------- Stage 2: Python runtime ----------
 FROM python:3.11-slim AS base
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
@@ -21,6 +30,9 @@ RUN pip install -r requirements.txt
 
 COPY . .
 
+# Copy built editor assets from stage 1
+COPY --from=editor-build /static/scripts/editor.js /static/scripts/editor.css shared_lib/static/scripts/
+
 # Link app blueprints into the shared library's namespace
 RUN ln -s /app/bp /app/shared_lib/suma_browser/app/bp
 

templates/_types/post/admin/_oob_elements.html

@@ -18,5 +18,5 @@
 {% endblock %}
 
 {% block content %}
-nowt
+  {% include '_types/post/admin/_main_panel.html' %}
 {% endblock %}

templates/_types/post/admin/index.html

@@ -14,5 +14,5 @@
 {% endblock %}
 
 {% block content %}
-nowt
+  {% include '_types/post/admin/_main_panel.html' %}
 {% endblock %}