feat(comfyuimini): add "Manage Photos" sidebar link to the Gallery

ComfyUIMini's built-in gallery is view-only. Inject a "Manage Photos"
link into its sidebar (via the shared head.ejs partial at build time, so
no fork) that points to the Model Manager's delete-capable Gallery. The
URL is built client-side from the browser host; the port is baked from
the MODEL_MANAGER_PORT build arg (default 8189).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

comfyuimini/Dockerfile

@@ -20,6 +20,13 @@ RUN npm ci && \
     npm run build && \
     npm prune --omit=dev
 
+# SparkyUI: add a "Manage Photos" sidebar link to the Model Manager gallery.
+# Appended to the head partial (included on every page) so we don't fork ComfyUIMini.
+ARG MODEL_MANAGER_PORT=8189
+COPY sparky-sidebar.html /tmp/sparky-sidebar.html
+RUN sed "s/__MM_PORT__/${MODEL_MANAGER_PORT}/g" /tmp/sparky-sidebar.html \
+      >> src/server/views/partials/head.ejs
+
 # Create config directory and default config
 # Config is overridden at runtime via NODE_CONFIG env var
 RUN mkdir -p config && \