Add discussions

Discussions are served from GitHub's older server-rendered HTML, with no
embeddedData JSON to read, so the scraper walks the DOM the way the pull
request and wiki code does. A discussion's timeline opens with its own
post and continues with its comments, each carrying its replies nested
inside it, which is where the recursion in _discussionComment.eta comes
from. Categories, upvotes, and the answer a Q&A discussion is marked with
all come along.

Only what GitHub renders up front is shown: neither the next page of
discussions nor the replies it hides behind a "Show N previous replies"
button are fetched, so a comment says how many replies it is missing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 34 insertions, 2 deletions

diff --git a/public/static/style.css b/public/static/style.css
index ad61fca..e9b43ed 100644
--- a/public/static/style.css
+++ b/public/static/style.css
@@ -27,6 +27,11 @@
     oklch(60% 0.15 250)
   );
 
+  --success-color: light-dark(
+    oklch(45% 0.15 150),
+    oklch(70% 0.15 150)
+  );
+
   --pl-c: light-dark(#6e7781, #8b949e);
   --pl-c1: light-dark(#0550ae, #79c0ff);
   --pl-e: light-dark(#6639ba, #d2a8ff);
@@ -310,7 +315,17 @@ pre.box {
   }
 }
 
-.overview, .release, .wiki {
+.pill {
+  margin-left: .2rem;
+  padding: 0 .4rem;
+  border: 1px solid var(--border-color);
+  border-radius: 1rem;
+  font-size: .8rem;
+  font-weight: normal;
+  white-space: nowrap;
+}
+
+.overview, .release, .wiki, .comment {
   overflow-wrap: break-word;
 
   /* This is a bit convoluted: we want the effect of padding but using margins
@@ -354,7 +369,7 @@ pre.box {
   font-weight: bold;
 }
 
-.release > header, .wiki > header {
+.release > header, .wiki > header, .comment > header {
   display: flex;
   align-items: baseline;
   > :first-child {
@@ -385,6 +400,23 @@ pre.box {
   font-size: .8rem;
 }
 
+.answered {
+  color: var(--success-color);
+}
+
+.comment.answer {
+  outline: 2px solid var(--success-color);
+  outline-offset: -1px;
+}
+
+.box:has(+ .reply) {
+  margin-bottom: 0;
+}
+
+.reply {
+  margin-top: -1px;
+}
+
 .commit {
   display: flex;
   justify-content: space-between;