## Summary
- Add a comprehensive plan document for convex backend support in .
- Outline architecture and implementation strategy for switching backend
storage and API behavior.
- Define staged rollout and verification steps.

## Test plan
- Run 
> dyad@0.37.0 fmt
> npx oxfmt, 
> dyad@0.37.0 lint:fix
> npx oxlint --fix --fix-suggestions --fix-dangerously

Found 0 warnings and 0 errors.
Finished in 20ms on 795 files with 88 rules using 10 threads., and 
> dyad@0.37.0 ts
> npm run ts:main && npm run ts:workers


> dyad@0.37.0 ts:main
> npx tsgo -p tsconfig.app.json --noEmit --incremental


> dyad@0.37.0 ts:workers
> npx tsc -p workers/tsc/tsconfig.json --noEmit --incremental locally.
- Manually review the generated plan document for completeness.

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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