Fix runtime PRIMITIVES for dom/browser library functions

dom.sx and browser.sx are library source (not transpiled into the bundle),
so their functions need explicit PRIMITIVES registration for runtime-eval'd
SX code (islands, data-init scripts). Restore registrations for all dom/
browser functions used at runtime. Revert bootstrap.py transpilation of
dom-lib/browser-lib which overrode native platform implementations that
have essential runtime integration (cekCall wrapping, post-render hooks).

Add Playwright regression test for [object Object] nav link issue.
Replace console-log calls with log-info in init-client.sx.txt.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

sx/sxc/init-client.sx.txt

@@ -14,10 +14,10 @@
 ;; CSSX flush hook — inject collected CSS rules into a <style> tag.
 ;; The spec calls (run-post-render-hooks) after hydration/swap/mount.
 ;; This is the application's CSS injection strategy.
-(console-log "init-client: registering cssx flush hook, type:" (type-of (fn () nil)))
+(log-info (str "init-client: registering cssx flush hook, type:" (type-of (fn () nil))))
 (register-post-render-hook
   (fn ()
-    (console-log "cssx flush: running, rules:" (len (collected "cssx")))
+    (log-info (str "cssx flush: running, rules:" (len (collected "cssx"))))
     (let ((rules (collected "cssx")))
       (when (not (empty? rules))
         (let ((style (or (dom-query "[data-cssx]")