Add piano item type with realtime play mode and remote notes

client/public/help.json

@@ -84,6 +84,10 @@
         {
           "keys": "Enter",
           "description": "Use item"
+        },
+        {
+          "keys": "Piano mode",
+          "description": "When using a piano: ASDFGHJKL;' plays C major notes, WETYUOP] plays sharps, Enter/Escape exits"
         }
       ]
     },

client/public/version.js

@@ -1,5 +1,5 @@
 // Maintainer-controlled web client version.
 // Format: YYYY.MM.DD Rn (example: 2026.02.20 R2)
-window.CHGRID_WEB_VERSION = "2026.02.22 R198";
+window.CHGRID_WEB_VERSION = "2026.02.22 R199";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";