diff --git a/backend/package/yuxi/storage/postgres/models_business.py b/backend/package/yuxi/storage/postgres/models_business.py
index 179e4708..f1a5fde8 100644
--- a/backend/package/yuxi/storage/postgres/models_business.py
+++ b/backend/package/yuxi/storage/postgres/models_business.py
@@ -264,7 +264,7 @@ class Conversation(Base):
 
     id = Column(Integer, primary_key=True, autoincrement=True, comment="Primary key")
     thread_id = Column(String(64), unique=True, index=True, nullable=False, comment="Thread ID (UUID)")
-    uid = Column(String(64), index=True, nullable=False, comment="UID")
+    uid = Column(String(225), index=True, nullable=False, comment="UID（含服务账号 uid，最长 225 字符）")
     agent_id = Column(String(64), index=True, nullable=False, comment="Agent ID")
     title = Column(String(255), nullable=True, comment="Conversation title")
     status = Column(String(20), default="active", comment="Status: active/archived/deleted")
@@ -283,7 +283,9 @@ class Conversation(Base):
     )
     channel_session_id = Column(String(64), nullable=True, comment="关联渠道会话 ID（冗余，便于查询）")
     channel_type = Column(String(32), nullable=True, index=True, comment="来源渠道类型（FR-10）")
-    channel_account_id = Column(String(64), nullable=True, comment="来源渠道账户 ID（FR-10）")
+    channel_account_id = Column(
+        String(128), nullable=True, comment="来源渠道账户 ID（FR-10，对齐 channel_accounts.account_id）"
+    )
 
     # Relationships
     messages = relationship("Message", back_populates="conversation", cascade="all, delete-orphan")
@@ -487,7 +489,7 @@ class MessageFeedback(Base):
     message_id = Column(
         Integer, ForeignKey("messages.id"), nullable=False, index=True, comment="Message ID being rated"
     )
-    uid = Column(String(64), nullable=False, index=True, comment="UID who provided feedback")
+    uid = Column(String(225), nullable=False, index=True, comment="UID who provided feedback（含服务账号 uid）")
     rating = Column(String(10), nullable=False, comment="Feedback rating: like or dislike")
     reason = Column(Text, nullable=True, comment="Optional reason for dislike feedback")
     created_at = Column(DateTime, default=utc_now_naive, comment="Feedback creation time")
@@ -769,7 +771,7 @@ class AgentRun(Base):
     id = Column(String(64), primary_key=True, comment="Run ID (UUID)")
     thread_id = Column(String(64), index=True, nullable=False, comment="Thread ID")
     agent_id = Column(String(64), index=True, nullable=False, comment="Agent ID")
-    uid = Column(String(64), index=True, nullable=False, comment="UID")
+    uid = Column(String(225), index=True, nullable=False, comment="UID（含服务账号 uid，最长 225 字符）")
     status = Column(
         String(32),
         index=True,
diff --git a/backend/package/yuxi/storage/postgres/models_channels.py b/backend/package/yuxi/storage/postgres/models_channels.py
index 84d7888e..5f65b326 100644
--- a/backend/package/yuxi/storage/postgres/models_channels.py
+++ b/backend/package/yuxi/storage/postgres/models_channels.py
@@ -867,7 +867,9 @@ class ChannelContentReviewRecord(Base):
 
     # 关联上下文
     channel_type = Column(String(32), nullable=False, index=True, comment="渠道类型（feishu / wechat / ...）")
-    account_id = Column(String(64), nullable=False, index=True, comment="渠道账户 ID")
+    account_id = Column(
+        String(128), nullable=False, index=True, comment="渠道账户 ID（对齐 channel_accounts.account_id）"
+    )
 
     # 审核入参
     resource_type = Column(