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/bootstrap_js.py

@@ -497,6 +497,7 @@ class JSEmitter:
             "store-env-attr": "storeEnvAttr",
             "to-kebab": "toKebab",
             "log-info": "logInfo",
+            "log-warn": "logWarn",
             "log-parse-error": "logParseError",
             "parse-and-load-style-dict": "parseAndLoadStyleDict",
             "_page-routes": "_pageRoutes",
@@ -2625,6 +2626,7 @@ PLATFORM_ORCHESTRATION_JS = """
       }
       return sxRenderWithEnv(source, merged);
     } catch (e) {
+      console.warn("sx:route eval error", e);
       return NIL;
     }
   }
@@ -2974,6 +2976,10 @@ PLATFORM_BOOT_JS = """
     if (typeof console !== "undefined") console.log("[sx-ref] " + msg);
   }
 
+  function logWarn(msg) {
+    if (typeof console !== "undefined") console.warn("[sx-ref] " + msg);
+  }
+
   function logParseError(label, text, err) {
     if (typeof console === "undefined") return;
     var msg = err && err.message ? err.message : String(err);

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)