Add console logging for client-side routing decisions

tryClientRoute now logs why it falls through: has-data, no content,
eval failed, or #main-panel not found. tryEvalContent logs the actual
error on catch. Added logWarn platform function (console.warn).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/sx/ref/orchestration.sx

@@ -545,19 +545,19 @@
       (if (nil? match)
         false
         (if (get match "has-data")
-          false
+          (do (log-info (str "sx:route server (has data) " pathname)) false)
           (let ((content-src (get match "content"))
                 (closure (or (get match "closure") {}))
                 (params (get match "params")))
             (if (or (nil? content-src) (empty? content-src))
-              false
+              (do (log-warn (str "sx:route no content for " pathname)) false)
               (let ((env (merge closure params))
                     (rendered (try-eval-content content-src env)))
                 (if (nil? rendered)
-                  false
+                  (do (log-warn (str "sx:route eval failed for " pathname)) false)
                   (let ((target (dom-query-by-id "main-panel")))
                     (if (nil? target)
-                      false
+                      (do (log-warn "sx:route #main-panel not found") false)
                       (do
                         (dom-set-text-content target "")
                         (dom-append target rendered)