fix(ui): link the repositories at their new paths

Both moved from quantus/ to blackbeard/: the observer to blackbeard/observer,
the miner to blackbeard/miner. Gitea 301s the old paths, but a redirect
survives only until something else takes the name.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E4Ldjix2ofMdQ7dzqgnYA8

web/src/App.tsx

@@ -406,11 +406,11 @@ export default function App() {
           Every number here is derived from public block headers, and the code that derives them is
           public too —{' '}
           <a
-            href="https://git.lair.cafe/quantus/blackbeard.observer"
+            href="https://git.lair.cafe/blackbeard/observer"
             target="_blank"
             rel="noreferrer noopener"
           >
-            git.lair.cafe/quantus/blackbeard.observer
+            git.lair.cafe/blackbeard/observer
           </a>
           .
         </span>

web/src/components/AboutPanel.tsx

@@ -16,8 +16,8 @@ import robPortrait from '../assets/rob.png'
 /** Where donations go. Also the string the QR is built from — see above. */
 export const DONATION_ADDRESS = 'qzkQq9ybiPm7gQR9E1ViQbW9RhqA2Rex9ZQkScU5zdJqjrre4'
 
-const MINER_REPO = 'https://git.lair.cafe/quantus/miner'
-const OBSERVER_REPO = 'https://git.lair.cafe/quantus/blackbeard.observer'
+const MINER_REPO = 'https://git.lair.cafe/blackbeard/miner'
+const OBSERVER_REPO = 'https://git.lair.cafe/blackbeard/observer'
 const AUTHOR_NAME = 'Rob Thijssen'
 const AUTHOR_SITE = 'https://rob.tn'
 
@@ -92,7 +92,7 @@ export function AboutPanel() {
               Everything the observer shows is derived from public block headers, chain state and
               the network's own telemetry feed. The code that derives it is at{' '}
               <a href={OBSERVER_REPO} rel="noreferrer">
-                git.lair.cafe/quantus/blackbeard.observer
+                git.lair.cafe/blackbeard/observer
               </a>
               , so any figure here can be traced to the read that produced it.
             </p>