* feat(editor): add JsonEditor component for JSON configuration editing
* fix(provider): update API Key visibility logic in ProviderForm component
* fix(editor): stabilize JsonEditor height and restore API Key logic
- Revert API Key visibility to preset-based rule and injection to non-custom preset only.
- Reduce JsonEditor min-height from rows*22px to rows*18px to lessen layout jitter when switching presets.
- Keep fonts/size consistent with the previous textarea for visual parity.
* - fix(form): remove websiteUrl auto-extraction from JSON to prevent incorrect overrides
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Co-authored-by: Jason <farion1231@gmail.com>
