Add friendly media source names with brand icons

- Registry of 17 popular media apps (browsers, players, streaming)
- Substring matching resolves raw process names to friendly names
- Brand-colored SVG icons displayed inline next to source name
- Russian locale support for Yandex Music (Яндекс Музыка)
- Unknown sources fall back to .exe-stripped name

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

media_server/static/css/styles.css

@@ -924,6 +924,22 @@ button:disabled {
     gap: 0.75rem;
 }
 
+.source-label {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.35rem;
+}
+
+.source-icon {
+    display: inline-flex;
+    align-items: center;
+}
+
+.source-icon svg {
+    width: 14px;
+    height: 14px;
+}
+
 .player-toggles {
     display: flex;
     align-items: center;