Plain name referrers like "Instagram" or "WhatsApp" (inferred from
User-Agent) were being passed to the favicon service as invalid
domains, returning a generic globe. Now skips favicon fetch for
any referrer without a dot, falling through to Phosphor icons.
Replace react-icons and @radix-ui/react-icons with @phosphor-icons/react
for a consistent icon style across all dashboard panels.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Display proper brand icons and names for AI referrers (ChatGPT,
Perplexity, Claude, Gemini, Copilot, DeepSeek, Grok, Meta AI,
You.com, Phind) in Top Referrers panel.
