v0.8.3: TUI stabilization — box calls, package fixes, sandbox, configure

Bug fixes:
- Fix box() calls: set color-pair before box, pass ACS default chtype integers
- Fix markdown functions: move to passepartout.channel-tui package where
  Croatoan is imported; use add-attributes/remove-attributes instead of
  :bold/:underline kwargs to add-string; call theme-color in gate-trace-lines
  to convert theme keys to Croatoan colors
- Fix sandbox: remove dex:get/dex:post from restricted symbols
  (blocked neuro-provider from loading)
- Export *log-lock* from passepartout (was unbound in jailed skill packages)
- Fix configure: always deploy to XDG, skip cp when source==dest
- Fix bash crash handler format string (~~ escaping)
- Revert test reorder in 28 files (caused package leakage in skill loader)

Design cleanup:
- Extract tui-run-screen from tui-main for clean separation
- Remove inject-stimulus alias
- Merge *backend-registry* into *probabilistic-backends*
- Fix read-framed-message whitespace DoS (4096-iteration max)
- Add *read-eval* nil to dispatcher-approvals-process read-from-string

passepartout

@@ -81,6 +81,9 @@ setup_system() {
         esac
     done
 
+    # Always deploy to XDG, not the dev directory
+    export PASSEPARTOUT_DATA_DIR="$(realpath -m "${XDG_DATA_HOME:-$HOME/.local/share}/passepartout")"
+
     echo -e "${BLUE}=== Passepartout: Configure ===${NC}"
     mkdir -p "$PASSEPARTOUT_CONFIG_DIR" "$PASSEPARTOUT_DATA_DIR" "$PASSEPARTOUT_STATE_DIR" "$PASSEPARTOUT_BIN_DIR"
     mkdir -p "$PASSEPARTOUT_DATA_DIR/org" "$PASSEPARTOUT_DATA_DIR/lisp" "$PASSEPARTOUT_DATA_DIR/tests"
@@ -97,7 +100,9 @@ setup_system() {
     fi
 
     echo -e "${YELLOW}--- Deploying Engine to $PASSEPARTOUT_DATA_DIR ---${NC}"
-    cp "$SCRIPT_DIR/passepartout.asd" "$PASSEPARTOUT_DATA_DIR/"
+    if [ "$SCRIPT_DIR" != "$PASSEPARTOUT_DATA_DIR" ]; then
+        cp "$SCRIPT_DIR/passepartout.asd" "$PASSEPARTOUT_DATA_DIR/"
+    fi
     mkdir -p "$PASSEPARTOUT_DATA_DIR/org" "$PASSEPARTOUT_DATA_DIR/lisp" "$PASSEPARTOUT_DATA_DIR/tests"
     export INSTALL_DIR="$PASSEPARTOUT_DATA_DIR"
 
@@ -106,7 +111,7 @@ setup_system() {
         [ -f "$f" ] || continue
         fname=$(basename "$f" .org)
         echo "Tangling $fname..."
-        cp "$f" "$PASSEPARTOUT_DATA_DIR/org/"
+        [ "$SCRIPT_DIR" != "$PASSEPARTOUT_DATA_DIR" ] && cp "$f" "$PASSEPARTOUT_DATA_DIR/org/"
         (cd "$PASSEPARTOUT_DATA_DIR/org" && emacs -Q --batch \
             --eval "(require 'org)" \
             --eval "(setq org-confirm-babel-evaluate nil)" \
@@ -382,7 +387,7 @@ case "$COMMAND" in
             --eval "(push (truename \"$PASSEPARTOUT_DATA_DIR/\") asdf:*central-registry*)" \
             --eval '(ql:quickload :passepartout/tui)' \
             --eval '(in-package :passepartout)' \
-            --eval '(handler-bind ((error (lambda (c) (format t "~%CRASH: ~a~%" c) (sb-debug:print-backtrace :count 30 :stream *error-output*) (finish-output) (finish-output *error-output*) (uiop:quit 1)))) (passepartout.channel-tui:tui-main))'
+            --eval '(handler-bind ((error (lambda (c) (ignore-errors (with-open-file (f (merge-pathnames ".cache/passepartout/tui-crash.log" (user-homedir-pathname)) :direction :output :if-exists :supersede :if-does-not-exist :create) (format f "CRASH: ~a~%~%" c) (sb-debug:print-backtrace :count 50 :stream f) (finish-output f))) (format t "~%=== TUI CRASH ===~%CRASH: ~a~%" c) (format t "Full backtrace saved to ~~/.cache/passepartout/tui-crash.log~~%") (sleep 3) (finish-output) (uiop:quit 1)))) (passepartout.channel-tui:tui-main))'
         ;;
     gateway)
         SUBCMD=$1; PLATFORM=$2; TOKEN=$3