feat(api): implement javascript-first architecture for cache compatibility

- Add REST endpoint GET /roi-theme/v1/adsense-placement/visibility
- Add Domain layer: UserContext, VisibilityDecision, AdsenseSettings VOs
- Add Application layer: CheckAdsenseVisibilityUseCase
- Add Infrastructure: AdsenseVisibilityChecker, Controller, Enqueuer
- Add JavaScript controller with localStorage caching
- Add test plan for production validation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

functions.php

@@ -174,6 +174,15 @@ try {
     );
     $youtubeFacadeHooksRegistrar->register();
 
+    // === ADSENSE JAVASCRIPT-FIRST MODE (Plan adsense-javascript-first) ===
+    // Mueve decisiones de visibilidad de PHP a JS para compatibilidad con cache
+    // @see openspec/specs/adsense-javascript-first/spec.md
+    $adsenseJsFirstProvider = new \ROITheme\Public\AdsensePlacement\Infrastructure\Providers\AdsenseJavascriptFirstServiceProvider(
+        $container
+    );
+    $adsenseJsFirstProvider->register();
+    $adsenseJsFirstProvider->boot();
+
     // === CACHE-FIRST ARCHITECTURE (Plan 1000.01) ===
     // Hook para plugins externos que necesitan evaluar acceso antes de servir página
     // @see openspec/specs/cache-first-architecture/spec.md