fix: 修复session-management中人格错误的显示为默认人格的问题 (#3000)

* fix: 修复session-management中人格错误的显示为默认人格的问题

#2985

* refactor: 使用命名表达式简化赋值和条件

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

* style: format edited code with ruff

format code edited by sourcery-ai

---------

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

astrbot/dashboard/routes/session_management.py

@@ -65,12 +65,12 @@ class SessionManagementRoute(Route):
                 persona_name = data["persona_name"]
 
                 # 处理 persona 显示
-                if conv_persona_id == "[%None]":
-                    persona_name = "无人格"
-                else:
-                    default_persona = persona_mgr.selected_default_persona_v3
-                    if default_persona:
-                        persona_name = default_persona["name"]
+                if persona_name is None:
+                    if conv_persona_id is None:
+                        if default_persona := persona_mgr.selected_default_persona_v3:
+                            persona_name = default_persona["name"]
+                    else:
+                        persona_name = "[%None]"
 
                 session_info = {
                     "session_id": session_id,