fix(svg): add missing negative color parameter to cyberpunk theme

[Abfa41]

Description

Fixes #6194

This PR adds the missing negative color parameter to the cyberpunk SVG theme.

Previously, the theme only defined background, text, and accent colors:

makeTheme('fce22a', '111111', 'ff003c')

The theme now includes a dedicated negative color value:

makeTheme('fce22a', '111111', 'ff003c', '2d0000')

Changes made

• Added the missing negative color parameter to the cyberpunk theme.
• Used a dark red (2d0000) consistent with the cyberpunk aesthetic.
• Aligned the theme with other theme definitions that support negative contribution rendering.

Benefits

• Ensures negative contribution values render consistently.
• Prevents undefined negative color behavior.
• Improves visual consistency across all SVG themes.
• No changes to existing theme APIs or rendering logic.

Notes

This change follows the recommended fix from the issue and only affects the cyberpunk theme definition.

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📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	3710.64 KB	3710.63 KB	+0.01 KB (+0.00%)
Total CSS	290.64 KB	290.64 KB	0 B