feat: show which banned phrases got filtered

assets/chat/js/chat.js

@@ -1203,6 +1203,17 @@ class Chat {
           `You are temporarily muted! You can chat again ${this.mutedtimer.getReadableDuration()}. Subscribe to remove the mute immediately.`,
         );
         break;
+      case 'bannedphrase': {
+        const phraseCountText =
+          data.filtered.length === 1
+            ? 'this banned phrase'
+            : 'these banned phrases';
+        const filteredPretty = data.filtered.map((p) => `"${p}"`).join(', ');
+        message = MessageBuilder.error(
+          `Your message was filtered because it contained ${phraseCountText}: ${filteredPretty}.`,
+        );
+        break;
+      }
       default:
         message = MessageBuilder.error(errorstrings.get(desc) || desc);
     }

assets/chat/js/const.js

@@ -79,8 +79,6 @@ const errorstrings = new Map(
     alreadyvoted: 'You have already voted!',
     nochatting:
       "You aren't allowed to chat. Either you haven't picked a username, or a mod disabled your privileges.",
-    bannedphrase:
-      'Your message was filtered because it contained a banned phrase.',
     duplicatephrase: 'Banned phrase already exists.',
     nophrase: "Banned phrase doesn't exist.",
   }),