fix(perception): replace string matching with structural feed marker check for perfect snapping

GramAddict/core/behaviors/perfect_snapping.py

@@ -29,9 +29,11 @@ class PerfectSnappingPlugin(BehaviorPlugin):
         if not getattr(self, "_enabled", True):
             return False
 
-        xml_lower = ctx.context_xml.lower()
-        # Do not snap if we are on a profile page or grid, it's meant for posts.
-        if "profile_tabs_container" in xml_lower or "explore_grid" in xml_lower:
+        # Perfect snapping is only for feed posts.
+        # Do not snap if we are on a profile page, explore grid, or modal.
+        from GramAddict.core.perception.feed_analysis import has_feed_markers
+
+        if not has_feed_markers(ctx.context_xml):
             return False
 
         return True