- Remove standalone steps state; steps now live inside each Frame object
- Initialize each frame with one default empty step on file upload
- Update handleAddSteps, handleUpdateStep, handleRemoveStep to operate
on frames array via nested map/filter
- Rename handleUpdateStepText -> handleUpdateStep
- Rename schema types to StepType, FrameType, GuideType
- Add steps and title fields to FrameSchema
- Wire FileUpload onChange and render Frame components in NewGuide
- Add NewGuide.css and basic input/textarea border styles
- Add useNewGuide hook with state and handlers for guide, frames, and steps
- Add title, description, and file upload inputs to NewGuide
- Add FileUpload component and supporting hooks
- Add guideId to FrameSchema, remove steps and order
- Remove content field and frames array from GuideSchema
- Remove order field from StepsSchema
