99 Club Studio v1.30.4

99 Club Studio v1.30.4

Consolidated visual correction built directly from the live v1.30.1 repository state.

• Arithmagon diagonal operation signs restored; perimeter signs moved outside the polygon.
• Direct PDF rendering brought into visual parity for the new Number Patterns visual families.
• Factor Pair Webs rebuilt as spaced, grouped factor-pair capsules with clipped spokes and centred centre text.
• Sum & Product Diamond PRODUCT/SUM labels explicitly optically centred.
• No change to the underlying v1.30.1 maths-generation rules for these puzzles.