Fix NODE_OPTIONS heap size for Vite build (896MB → 6144MB)

OOM observed during rendering-chunks phase at 896MB and 3072MB.
6144MB heap with 8GB LXC memory is confirmed working.
Also update README rebuild command to match.

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

README.md

@@ -84,7 +84,7 @@ matrix/
 - Management room: `#management:matrix.lotusguild.org` (`!mEvR5fe3jMmzwd-FwNygD72OY_yu8H3UP_N-57oK7MI`)
 - Bot account: `@draupnir:matrix.lotusguild.org` (power level 100 in all protected rooms and the Lotus Guild space)
 - Subscribed ban lists: `#community-moderation-effort-bl:neko.dev`, `#matrix-org-coc-bl:matrix.org`
-- Rebuild: `NODE_OPTIONS="--max-old-space-size=768" npx tsc --project tsconfig.json`
+- Rebuild: `NODE_OPTIONS="--max_old_space_size=6144" npm run build`
 - Healthz endpoint: `http://10.10.10.24:8081/healthz` (200 = healthy, 418 = disconnected)
 - Abuse reporting endpoint: `POST http://10.10.10.24:8080/_matrix/draupnir/1/report/{roomId}/{eventId}`
 - Audit DBs: `/data/storage/user-restriction-audit-log.db`, `/data/storage/room-audit-log.db`
@@ -406,7 +406,7 @@ chmod 600 /etc/cinny-monitor.env
 
 **Cinny-build webhook token** (for LotusBot `!cinny-update`): stored in `deploy/hooks-lxc106.json` (`cinny-build` hook, header `X-Build-Token`). LotusBot must POST to `http://10.10.10.6:9000/hooks/cinny-build` with this header.
 
-**Why 2GB RAM:** Vite's build process OOM-killed at 1GB. 896MB Node heap + OS overhead requires at least 1.5GB; 2GB gives headroom.
+**Why 8GB RAM:** Vite's build process needs ~6GB Node heap (`--max_old_space_size=6144`) for the rendering-chunks phase. Previously at 4GB — OOM killed during render.
 
 ---
 

cinny/lotus-build.sh

@@ -95,7 +95,7 @@ echo "Running npm ci..."
 npm ci 2>&1 | tail -5
 
 rm -rf "$BUILD_DIR"
-export NODE_OPTIONS='--max_old_space_size=896'
+export NODE_OPTIONS='--max_old_space_size=6144'
 echo "Building $LATEST_TAG..."
 npm run build 2>&1 | tail -10