Add context-aware command palette

client/public/help.json

@@ -7,6 +7,10 @@
           "keys": "Arrow Keys",
           "description": "Move on the grid"
         },
+        {
+          "keys": "Shift+K / Applications / Shift+F10",
+          "description": "Open the command palette in supported modes"
+        },
         {
           "keys": "C",
           "description": "Speak your coordinates"

client/public/piano.json

@@ -15,6 +15,10 @@
           "keys": "1 through 0",
           "description": "Change instrument presets."
         },
+        {
+          "keys": "Shift+K / Applications / Shift+F10",
+          "description": "Open the command palette."
+        },
         {
           "keys": "Minus / Equals",
           "description": "Shift octave down or up."
@@ -38,6 +42,10 @@
         {
           "keys": "Escape",
           "description": "Exit piano mode."
+        },
+        {
+          "keys": "Shifted note keys",
+          "description": "Ignored in piano mode so shifted shortcuts stay distinct."
         }
       ]
     }

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 = "2026.03.01 R334";
+window.CHGRID_WEB_VERSION = "2026.03.08 R335";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";