feat(simulation): sprint 10 — hub teleport, confrontation response, walk-away phase 2, gauntlet rooms 4-7, blocked_entities debug field

#491: PlayerAction::TeleportToHub — moves player to hub spawn, clears
dialogue/monologue/interaction buffer, Gauntlet-only with log warning.
#520: ConfrontationDelivered event — Tier 2 animation shift, relationship
state decrement (D-033), monologue spike emission.
#519: Walk-away Phase 2 — NPC animation shift + routine deviation on
dialogue exit (D-064).
#498: Four new Gauntlet rooms — Interaction Gallery, Fog Theater, Crowd
Plaza, Dialogue Room with constants and wiring.
#514: blocked_entities Vec<u64> on ObserverSnapshot, protocol v9.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/bridge/text_renderer.rs

@@ -159,6 +159,12 @@ pub fn format_snapshot_text(snapshot: &ObserverSnapshot) -> String {
         .ok();
     }
 
+    // Blocked entities (debug, #514)
+    if !snapshot.blocked_entities.is_empty() {
+        let ids: Vec<String> = snapshot.blocked_entities.iter().map(|id| id.to_string()).collect();
+        writeln!(out, "Blocked (LOS): {} [{}]", snapshot.blocked_entities.len(), ids.join(", ")).ok();
+    }
+
     writeln!(out, "===").ok();
     out
 }
@@ -281,6 +287,7 @@ mod tests {
             }),
             pending_recognitions: vec![],
             dialogue_response: None,
+            blocked_entities: vec![],
         }
     }
 
@@ -402,10 +409,27 @@ mod tests {
             current_monologue: None,
             pending_recognitions: vec![],
             dialogue_response: None,
+            blocked_entities: vec![],
         };
         let text = format_snapshot_text(&snap);
         assert!(text.contains("Tick 0"));
         assert!(text.contains("Player (-1,-1)"));
         assert!(text.contains("Tiles: 0 visible"));
     }
+
+    #[test]
+    fn blocked_entities_rendered() {
+        let mut snap = make_snapshot();
+        snap.blocked_entities = vec![42, 99, 1024];
+        let text = format_snapshot_text(&snap);
+        assert!(text.contains("Blocked (LOS): 3"));
+        assert!(text.contains("[42, 99, 1024]"));
+    }
+
+    #[test]
+    fn blocked_entities_empty_not_rendered() {
+        let snap = make_snapshot();
+        let text = format_snapshot_text(&snap);
+        assert!(!text.contains("Blocked (LOS)"));
+    }
 }