feat(desktop): auto-update the Kanban runtime in the background

packages/desktop/build/bin/kanban

@@ -14,6 +14,18 @@ SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 RESOURCES_DIR="$(dirname "$SCRIPT_DIR")"
 CLI_ENTRY="$RESOURCES_DIR/app.asar.unpacked/cli/cli.js"
 
+# Runtime-update override. The desktop orchestrator pre-validates the
+# path; we fail loudly on a missing file rather than silently falling
+# back, so the parent's rollback bookkeeping stays in sync with what
+# actually ran.
+if [ -n "$KANBAN_CLI_OVERRIDE" ]; then
+  if [ ! -f "$KANBAN_CLI_OVERRIDE" ]; then
+    echo "error: KANBAN_CLI_OVERRIDE points to missing file: $KANBAN_CLI_OVERRIDE" >&2
+    exit 1
+  fi
+  CLI_ENTRY="$KANBAN_CLI_OVERRIDE"
+fi
+
 if [ ! -f "$CLI_ENTRY" ]; then
   echo "error: Kanban CLI not found at $CLI_ENTRY" >&2
   exit 1

packages/desktop/build/bin/kanban.cmd

@@ -11,6 +11,17 @@ set "SCRIPT_DIR=%~dp0"
 set "RESOURCES_DIR=%SCRIPT_DIR%.."
 set "CLI_ENTRY=%RESOURCES_DIR%\app.asar.unpacked\cli\cli.js"
 
+REM Runtime-update override (see POSIX shim for rationale): fail loud
+REM on missing file rather than silently falling back to bundled.
+if defined KANBAN_CLI_OVERRIDE (
+  if not exist "%KANBAN_CLI_OVERRIDE%" (
+    echo error: KANBAN_CLI_OVERRIDE points to missing file: %KANBAN_CLI_OVERRIDE% >&2
+    endlocal
+    exit /b 1
+  )
+  set "CLI_ENTRY=%KANBAN_CLI_OVERRIDE%"
+)
+
 REM Windows packaged layout:
 REM   Kanban\resources\bin\kanban.cmd     (this file)
 REM   RESOURCES_DIR = Kanban\resources