OLD BEHAVIOR (broken):
parse_cards processed ALL [card:type] syntax FIRST, then [card type=...]
This caused cards to render out of order when syntaxes were mixed.
NEW BEHAVIOR (fixed):
Using a unified regex that matches BOTH syntaxes simultaneously:
/\[card(?::(\w+)|([^\]]*)?)\](.*?)\[\/card\]/s
Each match includes:
- Group 1: Card type from new syntax [card:type]
- Group 2: Attributes from old syntax [card type='...']
- Group 3: Card content
Cards now render in exact document order regardless of syntax used.
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