Add server chat slash commands for me and uptime

client/public/help.json

@@ -40,6 +40,10 @@
           "keys": "Slash",
           "description": "Start chat"
         },
+        {
+          "keys": "Slash commands",
+          "description": "In chat, use /me <action> for action text or /up for server uptime"
+        },
         {
           "keys": "Comma / Period",
           "description": "Previous/next message"

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 = "2026.02.27 R292";
+window.CHGRID_WEB_VERSION = "2026.02.27 R293";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";