fix(site): use support@agentlabs.cc for opencode-mobile support contact (#84)

The website's Support, Privacy, and Terms pages still showed
support@vibebrowser.app — leftover boilerplate from the parent
VibeBrowser product. App store listings, the privacy policy source
(distribution/privacy-policy.html), F-Droid metadata, and the in-app
mailto already use support@agentlabs.cc, so this brings the website
in line with the canonical support address.

Changed:
- website/app/support/page.tsx: mailto link + two visible address strings
- website/app/privacy/page.tsx: fallback contact string shown only if
  distribution/privacy-policy.html fails to load
- website/app/terms/page.tsx: Section 7 (No Support Obligation) and
  Section 14 (Contact) mailto links

Left untouched: AGENTS.md's VIBEBROWSER_REMOTE_URL example (a real
VibeBrowser relay URL, unrelated product) and historical planning notes
(context.md, HANDOFF.md, .autopilot/state.md) documenting the prior
opencode.vibebrowser.app/privacy hosting decision — those are logs of
past decisions, not live support/contact surfaces.

Co-authored-by: engineer <engineer@gray-knight-m1.local>

website/app/privacy/page.tsx

@@ -30,7 +30,7 @@ export default function PrivacyPage() {
     policyHtml = bodyMatch ? bodyMatch[1] : raw
   } catch {
     policyHtml = `<p style="color:#94A3B8">Privacy policy document not found. Please contact
-      <a href="mailto:support@vibebrowser.app" style="color:#3B82F6">support@vibebrowser.app</a>.</p>`
+      <a href="mailto:support@agentlabs.cc" style="color:#3B82F6">support@agentlabs.cc</a>.</p>`
   }
 
   return (