Outlier score badge on YouTube thumbnails

Scores every card against the median views of its own channel's last N
videos, badging the thumbnail above the duration stamp. Shorts and regular
videos are scored in separate pools, live streams in none. Baselines come
from YouTube's InnerTube endpoint, one request per channel, cached a day.
Interface in English and Turkish.

popup/popup.css

@@ -0,0 +1,71 @@
+body {
+  width: 280px;
+  margin: 0;
+  padding: 12px 14px 14px;
+  font: 13px/1.45 "Segoe UI", Roboto, sans-serif;
+  color: #eee;
+  background: #202124;
+}
+
+h1 {
+  margin: 0 0 10px;
+  font-size: 14px;
+  font-weight: 600;
+}
+
+.row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 5px 0;
+}
+
+select {
+  background: #303134;
+  color: #eee;
+  border: 1px solid #4a4a4a;
+  border-radius: 4px;
+  padding: 2px 4px;
+  font: inherit;
+}
+
+button {
+  background: #303134;
+  color: #eee;
+  border: 1px solid #4a4a4a;
+  border-radius: 4px;
+  padding: 4px 10px;
+  font: inherit;
+  cursor: pointer;
+}
+
+button:hover { background: #3c4043; }
+
+.wide { width: 100%; margin-top: 8px; }
+
+.warn {
+  margin-bottom: 10px;
+  padding: 8px;
+  border-radius: 6px;
+  background: #4a2f12;
+  color: #ffd8a8;
+}
+
+.warn button { margin-top: 6px; }
+
+.stats {
+  margin-top: 10px;
+  padding-top: 8px;
+  border-top: 1px solid #3c4043;
+  color: #9aa0a6;
+  font-size: 12px;
+  white-space: pre-line;
+}
+
+.note {
+  margin: 10px 0 0;
+  color: #9aa0a6;
+  font-size: 11px;
+  line-height: 1.5;
+}