Split ProviderForm.tsx (2227 → 1526 lines) by extracting:
- opencodeFormUtils.ts: pure functions and default config constants
- useOmoModelSource: OMO model source collection from OpenCode providers
- useOpencodeFormState: OpenCode provider form state and handlers
- useOmoDraftState: OMO profile draft editing state
- useOpenclawFormState: OpenClaw provider form state and handlers