feat(domains): per-record provider intel + vendor strip

Structured DNSRecord list carries the detected vendor per row (NS/MX/CNAME/
TXT value, ASN org, response headers, SPF includes, verification strings)
and a Providers strip shows registrar/DNS/hosting/email/CA with favicons —
the domainstack-style view. Detection tables expanded to ~70 NS, ~45 mail,
~60 CNAME, ~130 registrar, and ~50 TXT patterns.

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -6,6 +6,15 @@ All notable changes to Dash. Format follows
 
 ## [Unreleased]
 
+### Added
+
+- Domain detail now identifies vendors per record: A/AAAA/CNAME/NS/MX/TXT
+  rows carry provider badges (Cloudflare, Google, Purelymail, …) with favicon
+  icons, plus a five-role provider strip (registrar, DNS, hosting, email, CA)
+  above the detail sections. Detection covers ~70 NS providers, ~45 mail
+  providers, ~60 CNAME targets, ASN/org matching, response-header signals,
+  and TXT verification/SPF attribution
+
 ### Changed
 
 - Settings dialog regrouped into icon-labelled sections (renderer, appearance,