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

lisp/security-validator.lisp

@@ -1,3 +1,19 @@
+(in-package :passepartout)
+
+(defun validator-protocol-check (msg)
+  "Enforces structural schema compliance on protocol messages."
+  (validate-communication-protocol-schema msg))
+
+(defskill :passepartout-security-validator
+  :priority 95
+  :trigger (lambda (ctx) (declare (ignore ctx)) t)
+  :deterministic (lambda (action ctx)
+                   (declare (ignore ctx))
+                   (handler-case
+                       (progn (validator-protocol-check action) action)
+                     (error (c)
+                       (list :type :LOG :payload (list :level :error :text (format nil "Protocol Violation: ~a" c)))))))
+
 (eval-when (:compile-toplevel :load-toplevel :execute)
   (ql:quickload :fiveam :silent t))
 
@@ -25,19 +41,3 @@
   (let ((msg '(:payload (:sensor :heartbeat))))
     (signals error
       (validator-protocol-check msg))))
-
-(in-package :passepartout)
-
-(defun validator-protocol-check (msg)
-  "Enforces structural schema compliance on protocol messages."
-  (validate-communication-protocol-schema msg))
-
-(defskill :passepartout-security-validator
-  :priority 95
-  :trigger (lambda (ctx) (declare (ignore ctx)) t)
-  :deterministic (lambda (action ctx)
-                   (declare (ignore ctx))
-                   (handler-case
-                       (progn (validator-protocol-check action) action)
-                     (error (c)
-                       (list :type :LOG :payload (list :level :error :text (format nil "Protocol Violation: ~a" c)))))))