fix(apps): send workflowId not path from CLI; wire sandboxRoot and systemPromptPath in server; update prompts and fixtures

prompts/healthcheck_write.md

@@ -1,10 +1,8 @@
-# healthcheck_write.md
-
-Write a bash script to `scripts/healthcheck.sh` that reports:
+Write a bash healthcheck script that reports:
 - RAM usage %
 - CPU usage %
 - GPU usage % and VRAM usage % if an NVIDIA or AMD GPU is detected
 
 Use standard tools only (free, top/vmstat, nvidia-smi, rocm-smi).
 If no GPU is detected, skip that section gracefully.
-Make the script executable.
+Output path: scripts/healthcheck.sh