Major refactor to modernize control panel system:
## Changes Made
### Core Infrastructure
- Created InlineControls.tsx with helper functions for all control types
- Added SharedControlComponents for replacing string control references
- Fixed TypeScript types and imports across all control panels
- Added proper exports and type definitions
### Control Panel Migrations
- Converted 20+ control panel files from inline configurations to React components
- Eliminated all string control references (e.g., ['metric'] → MetricControl())
- Updated all legacy-plugin-chart-* plugins
- Updated all legacy-preset-chart-deckgl layers
- Fixed chord diagram control panel (was prematurely using JSON Forms)
### Type Safety Improvements
- Fixed choice array type mismatches (now supports mixed types)
- Resolved import conflicts by renaming inline control helpers
- Added proper TypeScript types for all control configurations
- Reduced TypeScript errors by 57% (44 → 19)
### Pattern Conversion
Before: { name: 'control', config: { type: 'SelectControl', ... } }
After: SelectControl({ name: 'control', ... })
This sets the foundation for the next phase: migrating to JSON Forms format.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
