feature：新增关系图谱显示功能，支持查看组织、角色、职业的所有关系连接。

backend/app/api/characters.py

@@ -81,7 +81,7 @@ async def _build_relationships_summary(character_id: str, project_id: str, db: A
 
 
 async def _build_org_members_summary(character_id: str, db: AsyncSession) -> str:
-    """从 organization_members 表构建组织成员摘要文本"""
+    """从 organization_members 表构建组织成员JSON字符串（与schema契约保持一致）"""
     # 先查找该角色对应的 Organization 记录
     org_result = await db.execute(
         select(Organization).where(Organization.character_id == character_id)
@@ -89,30 +89,32 @@ async def _build_org_members_summary(character_id: str, db: AsyncSession) -> str
     org = org_result.scalar_one_or_none()
     if not org:
         return ""
-    
-    # 查询该组织的所有成员
+
+    # 查询该组织的所有成员（按职级倒序，保证展示顺序稳定）
     members_result = await db.execute(
-        select(OrganizationMember).where(OrganizationMember.organization_id == org.id)
+        select(OrganizationMember)
+        .where(OrganizationMember.organization_id == org.id)
+        .order_by(OrganizationMember.rank.desc(), OrganizationMember.created_at)
     )
     members = members_result.scalars().all()
     if not members:
         return ""
-    
+
     # 批量查询成员角色名称
     member_char_ids = [m.character_id for m in members]
     chars_result = await db.execute(
         select(Character.id, Character.name).where(Character.id.in_(member_char_ids))
     )
     name_map = {row.id: row.name for row in chars_result}
-    
-    # 构建摘要
-    parts = []
+
+    # 返回 JSON 字符串数组，避免前端 JSON.parse 报错
+    member_items = []
     for m in members:
         name = name_map.get(m.character_id, "未知")
         position = m.position or "成员"
-        parts.append(f"{name}（{position}）")
-    
-    return "、".join(parts)
+        member_items.append(f"{name}（{position}）")
+
+    return json.dumps(member_items, ensure_ascii=False)
 
 
 @router.get("", response_model=CharacterListResponse, summary="获取角色列表")

backend/app/api/relationships.py

@@ -108,14 +108,14 @@ async def get_relationship_graph(
         for c in characters
     ]
     
-    # 获取所有关系（边）
+    # 获取所有角色关系（边）
     rels_result = await db.execute(
         select(CharacterRelationship).where(
             CharacterRelationship.project_id == project_id
         )
     )
     relationships = rels_result.scalars().all()
-    
+
     links = [
         RelationshipGraphLink(
             source=r.character_from_id,
@@ -126,8 +126,34 @@ async def get_relationship_graph(
         )
         for r in relationships
     ]
-    
-    logger.info(f"获取项目 {project_id} 的关系图谱：{len(nodes)} 个节点，{len(links)} 条关系")
+
+    # 获取组织成员关系（组织 -> 成员）并追加到图谱边
+    # source 使用组织对应的角色ID（Organization.character_id），确保与节点ID一致
+    members_result = await db.execute(
+        select(OrganizationMember, Organization).join(
+            Organization,
+            OrganizationMember.organization_id == Organization.id
+        ).where(Organization.project_id == project_id)
+    )
+    org_members = members_result.all()
+
+    member_links = [
+        RelationshipGraphLink(
+            source=org.character_id,
+            target=member.character_id,
+            relationship=f"组织成员·{member.position}",
+            intimacy=member.loyalty,
+            status=member.status
+        )
+        for member, org in org_members
+    ]
+
+    links.extend(member_links)
+
+    logger.info(
+        f"获取项目 {project_id} 的关系图谱：{len(nodes)} 个节点，"
+        f"{len(relationships)} 条角色关系，{len(member_links)} 条组织成员关系"
+    )
     return RelationshipGraphData(nodes=nodes, links=links)