feat(grounding): vérification titre OCR post-action (non-bloquante)

TitleVerifier (core/grounding/title_verifier.py) :
- Crop 45px barre de titre → OCR → compare avant/après (~280ms)
- Titres < 3 chars ignorés (bruit OCR sur VM)
- Non-bloquant : échec = warning, pas stop

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

core/execution/observe_reason_act.py

@@ -1313,6 +1313,26 @@ Règles:
             # Stocker le pHash post-action pour le réflexe check du step suivant
             self._last_post_phash = post.phash
 
+            # --- 4b. Vérification titre OCR (non-bloquante, ~120ms) ---
+            _action_type = step.get('action_type', '')
+            if _action_type in ('double_click_anchor', 'click_anchor') and pre.screenshot and post.screenshot:
+                try:
+                    from core.grounding.title_verifier import TitleVerifier
+                    _tv = TitleVerifier()
+                    _tv_result = _tv.verify_action(pre.screenshot, post.screenshot, _action_type)
+                    if not _tv_result['success']:
+                        print(f"⚠️ [ORA/titre] {_tv_result['reason']} → retry")
+                        # Retry : recliquer
+                        time.sleep(0.5)
+                        self.act(decision, step)
+                        time.sleep(0.3)
+                        post = self.observe()
+                        self._last_post_phash = post.phash
+                    elif _tv_result['changed']:
+                        print(f"✅ [ORA/titre] '{_tv_result['title_after'][:40]}'")
+                except Exception as _tv_err:
+                    print(f"⚠️ [ORA/titre] Erreur: {_tv_err}")
+
             # --- 5. Vérifier ---
             verification = self.verify(pre, post, decision)