chore: strip the comments this branch added

Removes every comment introduced on this branch: website/ in full, pages.yml
in full, and only the blocks added to ci.yml and release.yml — their
pre-existing comments are untouched.

Two directives survive because they are load-bearing rather than prose: the
triple-slash vite/client reference, and nothing else.

Two comments were carrying behaviour that the code did not state, so the
code now states it. useCopy's rejection handler clears the copied flag
instead of sitting empty, and writeTheme returns whether the write actually
landed instead of swallowing the failure in a bare catch. isExternal drops
its regex for two startsWith calls, which reads the same and no longer
hides a `//` inside a literal.

website/index.html

@@ -3,8 +3,6 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <!-- Root-relative on purpose: Vite rewrites this against `base`, so the
-         deploy path lives in vite.config.ts alone. -->
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
 
     <title>soulseek-rs, a Soulseek client for your terminal</title>
@@ -12,7 +10,6 @@
       name="description"
       content="soulseek-rs is a keyboard-driven Soulseek client and a Rust protocol library. Search, share, browse, and chat from your terminal."
     />
-    <!-- Browser chrome follows the theme; one value would be wrong half the time. -->
     <meta name="theme-color" content="#14110F" media="(prefers-color-scheme: dark)" />
     <meta name="theme-color" content="#F2EDE4" media="(prefers-color-scheme: light)" />
 
@@ -22,18 +19,10 @@
       property="og:description"
       content="A Soulseek client and protocol library for Rust. Search, share, browse, and chat from your terminal."
     />
-    <!-- og:url and canonical are rewritten per route by scripts/prerender.ts. -->
     <meta property="og:url" content="https://re-invention.nl/soulseek-rs/" />
     <link rel="canonical" href="https://re-invention.nl/soulseek-rs/" />
     <meta name="twitter:card" content="summary" />
 
-    <!-- IBM Plex Mono is the brand typeface. CDN rather than self-hosted
-         binaries, matching the design system's tokens/fonts.css. OFL 1.1.
-
-         Loaded non-blocking: as a plain stylesheet it sat on the critical
-         path, so first paint waited on a third-party DNS + TLS + fetch. It
-         buys nothing there — `display=swap` plus the ui-monospace fallback
-         means the first frame renders in the fallback either way. -->
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
     <link
@@ -50,9 +39,6 @@
     </noscript>
 
     <script>
-      // Runs before first paint so the right theme is already on <html>.
-      // Without it the page flashes the wrong background on every load.
-      // Mirrors the resolution order in src/theme/theme-provider.tsx.
       ;(function () {
         try {
           var stored = localStorage.getItem('ssrs-theme')
@@ -64,7 +50,6 @@
           document.documentElement.dataset.theme = theme
           document.documentElement.style.colorScheme = theme
         } catch (e) {
-          // localStorage blocked; the dark default in the markup stands.
         }
       })()
     </script>