🛡️ Sentinel: Fix rate limiter IP validation and spoofing risk

[google-labs-jules]

Enhance rate limiting IP extraction in src/app/api/chat/ratelimit.ts with IPv4 and IPv6 format validation to prevent rate limiter bypass and header spoofing with malformed IP strings.

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PR created automatically by Jules for task 18163352524245392578 started by @amrabed

[google-labs-jules]

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Project	Deployment	Actions	Updated (UTC)
amrabed-github-io	Ready	Preview	Aug 18, 2026 4:26am