fix: API install prisma+generate in pruned, AI use absolute cargo path

- API: npm install prisma @prisma/client in pruned dir before generate
- AI: use /root/.cargo/bin/cargo directly, install underthesea with --no-build-isolation

Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>

apps/api/Dockerfile

@@ -35,11 +35,13 @@ RUN npx prisma generate \
     && cd apps/api && npx nest build
 
 # Use pnpm deploy to produce a flat, production-only node_modules
-# Then re-generate Prisma client inside pruned dir (pnpm deploy doesn't carry .prisma)
+# Then install prisma + generate client in pruned dir (pnpm deploy strips dev deps)
 RUN pnpm deploy --legacy --filter @goodgo/api --prod /app/pruned \
     && cd /app/pruned \
     && cp -r /app/prisma ./prisma \
-    && npx prisma generate
+    && npm install --no-save prisma @prisma/client \
+    && npx prisma generate \
+    && npm remove --no-save prisma
 
 # ---- Production ----
 FROM node:22-slim AS production