feat: add generate_screen_from_json virtual tool

[Eyaldavid7]

Summary

Adds a new virtual tool generate_screen_from_json that combines a design prompt with live JSON data, so generated screens render real content instead of placeholder text.

• Wraps upstream generate_screen_from_text with an enhanced prompt containing data binding instructions + serialized JSON
• Input validation: type checks for all 3 required params (projectId, prompt, jsonData)
• Safety: 100KB payload size limit, circular reference detection, prompt injection mitigation via JSON round-tripping
• Response includes generateResult, dataBound, originalPrompt, and dataKeys metadata
• Registered in virtual tools index, documented in tool-catalog.md

Use case

When building data-driven UIs (dashboards, admin panels, game screens), generate_screen_from_text produces beautiful layouts with placeholder content. This tool lets you pass your actual API/app JSON data alongside the design prompt, so the generated HTML renders real values — zero manual data binding needed.

Files changed

File	Change
src/commands/tool/virtual-tools/generate-screen-from-json.ts	New virtual tool implementation
src/commands/tool/virtual-tools/index.ts	Register tool in virtualTools array
tests/commands/tool/virtual-tools/generate-screen-from-json.test.ts	19 unit tests
docs/tool-catalog.md	Document new tool

Test plan

• 19 new unit tests covering:
  • Happy path: object, array, JSON string, empty, nested, primitives
  • Validation: missing/wrong types for projectId, prompt, jsonData
  • Edge cases: circular references, invalid JSON strings, >100KB payloads
  • Security: prompt injection via backtick fences
  • Error propagation: callTool failures bubble correctly
  • Response shape: no field collision with upstream result
• Full test suite passes (485 tests, 0 failures)
• Manual testing with a live Stitch project

🤖 Generated with Claude Code

[zoniquezaza-collab]

Wow it's owsome bro