Fixed three potential fatal errors where json_decode could return null:
1. save() method (lines 39-41): Added null coalescing to default to empty array,
and ensure service entry exists before writing domain
2. generate() method (line 56): Changed to use assoc flag consistently and
fallback to empty array
3. generate() method (lines 95-97): Same fix as save() - null coalescing and
service entry initialization
All json_decode calls now consistently:
- Use the assoc flag to return arrays (not objects)
- Fall back to empty array with ?: []
- Initialize service entry with ?? [] before writing
This prevents "Attempt to modify property of null" fatal errors.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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