fix: subreddit badge fill, tagline 'to' cleanup, and comments li spacing

- Default subreddit badge background from transparent to opaque fill
  (light: #fde8e0, dark: #3d2518) so page highlights don't bleed through
- Remove lingering "to" text node from tagline when subreddit is hidden
- Hide the <li> wrapping the comments link (not just the <a>) to
  eliminate leftover whitespace in the flat-list
- Simplify popup: subreddit bg fields are now color pickers (no longer
  need transparent text-input workaround)

Co-authored-by: Cursor <cursoragent@cursor.com>

content/tweaks/badges.js

@@ -59,6 +59,11 @@
       badge.textContent = subLink.textContent.trim();
       subredditName = subLink.textContent.trim().replace(/^r\//, "");
       container.appendChild(badge);
+
+      const prevNode = subLink.previousSibling;
+      if (prevNode && prevNode.nodeType === Node.TEXT_NODE && /\bto\s*$/.test(prevNode.textContent)) {
+        prevNode.textContent = prevNode.textContent.replace(/\s*to\s*$/, " ");
+      }
     }
 
     const commentsLink = post.querySelector(".flat-list .comments");