🎨 Palette: Improve keyboard accessibility for modal triggers

[0m364]

💡 What: Added role="button" and aria-haspopup="dialog" to all OSINT modal trigger links and enabled Spacebar keyboard activation.
🎯 Why: Using anchor tags as buttons breaks standard accessibility and keyboard navigation expectations because screen readers announce them as links, and they do not natively respond to the spacebar.
📸 Before/After: Visuals remain unchanged, but the #sitrep-modal can now be triggered correctly by keyboard users pressing Space while focused on the 'OSINT' links.
♿ Accessibility: Ensures that interactive elements acting as buttons properly announce their function and respond to standard keyboard interactions (Enter and Space), satisfying WCAG guidelines.

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PR created automatically by Jules for task 15150548428979796306 started by @0m364

[google-labs-jules]

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