Proactive doctor, setup wizard, and TUI fixes

BREAKING CHANGES / KNOWN ISSUES:
- 8 skills have syntax errors causing loader warnings:
  org-skill-bouncer, org-skill-config-manager, org-skill-credentials-vault,
  org-skill-engineering-standards, org-skill-gardener, org-skill-homoiconic-memory,
  org-skill-peripheral-vision, org-skill-policy
- These skills fail to load but don't block system operation
- TUI works despite these errors

FEATURES ADDED:

1. Proactive Doctor System
   - Doctor runs automatically on daemon startup
   - Health check runs before accepting connections
   - Adds /health endpoint for health status queries
   - *system-health* variable tracks: :healthy, :degraded, :unhealthy, :unknown

2. Error Handling (Option B - Debugger Hook)
   - TUI and CLI now run doctor diagnostics on errors
   - Shows "Run opencortex doctor" message on crash
   - Suggests repair commands after failures

3. Interactive Setup Wizard (org-skill-config-manager)
   - Full wizard implemented in config-manager skill:
     * LLM provider configuration (OpenAI, Anthropic, OpenRouter, Groq, Gemini, Ollama)
     * Gateway linking (Slack, Discord)
     * Memory settings (auto-save interval, history retention)
     * Network settings (timeout, proxy)
   - Saves to ~/.config/opencortex/.env (KEY=VALUE format)
   - CLI integration: opencortex setup, setup --add-provider, setup --link

4. CLI Enhancements
   - doctor --watch: Background health monitoring (60s interval)
   - doctor --fix: Interactive repair (falls back to full setup if core files missing)
   - setup command runs wizard or delegates to setup_system

5. TUI Fixes
   - Inlined message formatting to avoid dependency issues
   - Added error handling in handle-return
   - Cleaner error messages

6. Thin Harness Compliance
   - Removed doctor from harness (now in org-skill-diagnostics skill)
   - XDG directories: only .lisp in harness, .org kept in skills for loader

harness/communication.org

@@ -83,6 +83,17 @@ The ~communication.lisp~ module defines the low-level transport and framing logi
               (cond
                 ((eq msg :eof) (return))
                 ((eq msg :error) (return))
+                ((eq (getf msg :type) :health-check)
+                 ;; Handle health check request
+                 (let ((health-msg (list :type :health-response 
+                                          :status (or (and (boundp 'opencortex::*system-health*) 
+                                                          (symbol-value 'opencortex::*system-health*))
+                                                      :unknown)
+                                          :checked-p (or (and (boundp 'opencortex::*health-check-ran*)
+                                                              (symbol-value 'opencortex::*health-check-ran*))
+                                                      nil))))
+                   (format stream "~a" (frame-message health-msg))
+                   (finish-output stream)))
                 (t (inject-stimulus msg :stream stream))))))
       (error (c) (harness-log "CLIENT ERROR: ~a" c)))
     (ignore-errors (usocket:socket-close socket))))