fix(openclaw): copy /app as real directory to avoid symlink escape check

The OpenClaw runtime validates that resolved symlinks stay within
/app/dist/extensions/. When /app was a Nix store symlink, realpath
resolved to /nix/store/ which 'escaped' the boundary. Now we copy
the app files into /app as a real directory in extraCommands.

packages/openclaw-image/default.nix

@@ -159,9 +159,6 @@ pkgs.dockerTools.buildLayeredImage {
     # Node user home directory
     nodeHome
 
-    # The openclaw application extracted from the upstream image
-    openclawApp
-
     # Docker entrypoint script (in /usr/local/bin)
     entrypointPkg
 
@@ -184,6 +181,10 @@ pkgs.dockerTools.buildLayeredImage {
     # Gitea CLI (PR workflow)
     pkgs.tea
   ];
+  # NOTE: openclawApp is NOT in contents. It would create /app as a symlink
+  # to /nix/store/..., which breaks OpenClaw's symlink escape security check
+  # (resolved paths "escape" /app/dist/extensions). Instead, extraCommands
+  # copies the real files into /app as a proper directory.
 
   extraCommands = ''
     # Create /tmp with correct permissions (needed by Node.js and nix)
@@ -195,6 +196,14 @@ pkgs.dockerTools.buildLayeredImage {
 
     # Create /var/empty (referenced by NSS passwd home dirs)
     mkdir -p var/empty
+
+    # Copy OpenClaw app as a REAL directory (not a Nix store symlink).
+    # The app has a symlink escape check: resolved paths must stay within
+    # /app/dist/extensions/. If /app is a symlink to /nix/store/HASH/app/,
+    # realpath resolves to /nix/store/... which "escapes" the boundary.
+    rm -rf app
+    mkdir -p app
+    cp -a ${openclawApp}/app/. app/
   '';
 
   config = {