OCSB_DISPLAY: agent windows on the desktop through the Wayland socket

Off by default. With OCSB_DISPLAY=1 the sandbox gets only the Wayland socket and /dev/dri: the agent's windows (e.g. a Playwright browser) appear on the desktop, but a Wayland client cannot read other windows or inject input into them. X11 and the X cookie are never passed in.

lib/common.sh

@@ -19,7 +19,7 @@ ocsb_info() { echo "→ $*"; }
 
 OCSB_SCALARS=(
   OCSB_NAME OCSB_WEB_PORT OCSB_EGRESS_PORT OCSB_NETLOCK_GROUP OCSB_SANDBOX OCSB_PANEL
-  OCSB_NOTIFICATIONS OCSB_TMP OCSB_OPENCODE_BIN OCSB_ENV_FILE OCSB_KUBECONFIG OCSB_PASSWORD_FILE
+  OCSB_NOTIFICATIONS OCSB_TMP OCSB_DISPLAY OCSB_OPENCODE_BIN OCSB_ENV_FILE OCSB_KUBECONFIG OCSB_PASSWORD_FILE
   OCSB_WORKTREES_DIR OCSB_WT_PREFIX OCSB_WT_BASE OCSB_WT_SLUG_REGEX OCSB_DOCKER_GW
   OCSB_STATE_DIR OCSB_OPENCODE_CONFIG OCSB_EGRESS_BASE
 )
@@ -34,6 +34,7 @@ ocsb_defaults() {
   OCSB_PANEL=1                 # "Tokens" panel in the web UI (plugins/context-panel)
   OCSB_NOTIFICATIONS=1         # desktop notifications through a filtered D-Bus proxy
   OCSB_TMP=private             # private: own /tmp in the state dir; shared: the host's /tmp
+  OCSB_DISPLAY=0               # 1: windows on your desktop through the Wayland socket (no X11)
   OCSB_OPENCODE_BIN=""         # default: `opencode` from PATH
   OCSB_ENV_FILE=""             # KEY=VALUE file with tokens, exported to OpenCode
   OCSB_KUBECONFIG=""           # kubeconfig for the agent (~/.kube/config stays hidden)