Improve execution details UI: hide technical noise, focus on human-readable output

[louis030195]

Problem

The current execution details page shows too much technical noise that's not useful for most users:

1. Formatted Output section shows raw JSON with null properties ("data": null, "human": null, etc.)
2. API Request section is prominent but nobody is using APIs right now
3. Error messages like "Process exited with code 1" are not actionable

Proposed Changes

1. Formatted Output

• Hide by default or collapse
• Don't render null properties in the JSON
• If human field exists, show that prominently instead of raw JSON
• Consider a "Show Raw" toggle for debugging

2. API Request Section

• Move to a less prominent location (collapsed by default or in a "Developer" tab)
• Most users don't care about API access

3. Human-Readable Focus

• Extract and display human field prominently when available
• Show actionable error messages, not just exit codes
• Summarize what happened in plain language

Screenshot

Current state shows technical details that aren't helpful:

• "data": null
• "exception": true
• "human": null
• "message": "TypeScript workflow execution failed"
• "skipped": false
• "success": false
• "validation": {}

Should instead show: "Workflow failed: TypeScript execution error" with expandable details.