Complete M11 Creator Studio and M12 Trust & Safety for PC5

- Creator Studio: Visual behavior & property inspector, GLB model importer, binary persistence
- Trust & Safety: 18+ TOS confirmation (DOB removed), creator guidelines & briefing card on join, in-game reporting HUD
- Test Harness: Add --filter, --skip-backend, --skip-godot to run_checkpoint_tests.py

scripts/api_client.gd

@@ -213,20 +213,31 @@ func login(username: String, password: String) -> Dictionary:
 
 
 ## Register a new user. On success stores the returned access token.
-## @param date_of_birth ISO "YYYY-MM-DD". The backend computes age from it
-##                       and rejects under-18s (403).
+## ModBison is an 18+ platform. Supports over_18 boolean or optional legacy DOB string.
 func register(
 	username: String,
 	email: String,
 	password: String,
-	date_of_birth: String
+	p4: Variant = true,
+	p5: String = ""
 ) -> Dictionary:
-	var payload := {
+	var over_18: bool = true
+	var date_of_birth: String = ""
+	if p4 is bool:
+		over_18 = p4
+		date_of_birth = p5
+	elif p4 is String:
+		date_of_birth = p4
+		over_18 = true
+
+	var payload: Dictionary = {
 		"username": username,
 		"email": email,
 		"password": password,
-		"date_of_birth": date_of_birth,
+		"over_18": over_18,
 	}
+	if not date_of_birth.is_empty():
+		payload["date_of_birth"] = date_of_birth
 	var result := await request(
 		HTTPClient.METHOD_POST,
 		"/api/auth/register",
@@ -238,6 +249,8 @@ func register(
 	return result
 
 
+
+
 ## List worlds visible to the current user (requires auth).
 ## @param visibility Optional filter: "public", "private", "friends_only".
 func get_worlds(skip: int = 0, limit: int = 50, visibility: String = "") -> Dictionary:
@@ -249,17 +262,19 @@ func get_worlds(skip: int = 0, limit: int = 50, visibility: String = "") -> Dict
 
 ## Create a new world owned by the current user (requires auth).
 ## On success, result.data is the created World object containing {"id", "name", ...}.
-func create_world(world_name: String, description: String = "", visibility: String = "public", category: String = "Building", tags: Array = []) -> Dictionary:
+func create_world(world_name: String, description: String = "", visibility: String = "public", category: String = "Building", tags: Array = [], content_guidelines: String = "") -> Dictionary:
 	var payload: Dictionary = {
 		"name": world_name,
 		"description": description,
 		"visibility": visibility,
 		"category": category,
 		"tags": tags,
+		"content_guidelines": content_guidelines,
 	}
 	return await request(HTTPClient.METHOD_POST, "/api/worlds/", JSON.stringify(payload), "application/json", true)
 
 
+
 ## Ping the backend health endpoint (no auth).
 func health_check() -> Dictionary:
 	return await request(HTTPClient.METHOD_GET, "/api/health", "", "application/json", false)
@@ -470,6 +485,24 @@ func report_message(message_id: int, conversation_type: String, reason: String,
 	return await SocialApiClient.report_message(self, message_id, conversation_type, reason, context_text)
 
 
+## Submit a moderation report for a world, user, or chat message.
+func submit_moderation_report(target_type: String, target_id: int, reason: String, category: String = "general") -> Dictionary:
+	var payload := {
+		"target_type": target_type,
+		"target_id": target_id,
+		"reason": reason,
+		"category": category,
+	}
+	return await request(
+		HTTPClient.METHOD_POST,
+		"/api/moderation/reports",
+		JSON.stringify(payload),
+		"application/json",
+		true
+	)
+
+
+
 # ---------------------------------------------------------------------------
 # Discovery Features
 # ---------------------------------------------------------------------------