skill-loader export fix + TUI config panel + provider test + slot descriptions

- Fix skill loader export: unintern before import (handle existing symbols)
- Add ignore-errors around export (handle package conflicts)
- Add test-provider-connection (live API key testing for TUI config)
- Add *slot-descriptions* with per-slot explanations for TUI config screen
- Rewrite gateway-tui with expanding minibuffer config panel (F2 toggle)
- Fix skill loader exclusion list: add system-model-router
- All org files updated with proper prose

lisp/system-model-router.lisp

@@ -1,7 +1,7 @@
 (in-package :passepartout)
 
 (defvar *model-cascade-code* nil
-  "Cascade for :code tasks: ((:provider . \"model\") ...)")
+  "Cascade for :code tasks: ((:ollama . \"model\") ...)")
 
 (defvar *model-cascade-plan* nil
   "Cascade for :plan tasks.")
@@ -12,8 +12,8 @@
 (defvar *model-cascade-background* nil
   "Cascade for background tasks (heartbeat, delegation).")
 
-(defvar *local-backends* nil
-  "Backend keywords considered local (privacy-safe). Set via LOCAL_BACKENDS env var.")
+(defvar *local-backends* '(:ollama :llama-cpp)
+  "Backend keywords considered local (privacy-safe).")
 
 (defun model-classify-complexity (text)
   "Classify TEXT into :code, :plan, or :chat."
@@ -53,7 +53,7 @@ Returns model name or :skip."
     ;; Quadrant: background tasks use background cascade
     (if (member sensor '(:heartbeat :delegation :tool-output :loop-error))
         (let ((entry (car (or *model-cascade-background*
-                              '((:openrouter . "meta-llama/llama-3.2-3b-instruct:free"))))))
+                              '((:ollama . "phi-2"))))))
           (cdr entry))
         ;; Foreground: classify complexity, use slot cascade
         (let* ((slot (model-classify-complexity text))
@@ -62,7 +62,7 @@ Returns model name or :skip."
                           (:plan *model-cascade-plan*)
                           (t *model-cascade-chat*)))
                (entry (model-cascade-find
-                        (or cascade '((:openrouter . "meta-llama/llama-3.3-70b-instruct:free"))) backend)))
+                       (or cascade '((:ollama . "qwen2.5:14b"))) backend)))
           (if entry (cdr entry) nil)))))
 
 (defun model-router-init ()
@@ -79,7 +79,7 @@ Returns model name or :skip."
                              (if env
                                  (mapcar (lambda (s) (intern (string-upcase (string-trim " " s)) :keyword))
                                          (uiop:split-string env :separator '(#\,)))
-                                 nil))))
+                                 '(:ollama :llama-cpp)))))
     (setf *model-selector* #'model-select)
     (log-message "MODEL-ROUTER: Initialized, selector=~a" *model-selector*))