diff --git a/yunke-server/app/db/models.py b/yunke-server/app/db/models.py
index 0cd3d01..72f1608 100644
--- a/yunke-server/app/db/models.py
+++ b/yunke-server/app/db/models.py
@@ -537,6 +537,18 @@ class Message(Base):
             "ix_message_fetched_at",
             "fetched_at",
         ),
+        # 该回未回决赛圈点查(owner+talker 定位末条消息)在 channel=None
+        # (全平台计数——管理驾驶舱 action_counts 复用)时无渠道前缀条件,
+        # 上面全部以 channel 打头的索引用不上,逐候选退化扫表+filesort:
+        # 2026-09-10 服务器实测 dashboard 34~37s 撞前端 15s 超时
+        # (ECONNABORTED);补无渠道前缀索引后 1.3~1.8s(100 万行在线建
+        # 索引 49s)。「模型+迁移双声明」防 alembic autogenerate 反 DROP。
+        Index(
+            "ix_message_owner_talker_time",
+            "owner_account_id",
+            "talker_id",
+            "timestamp",
+        ),
     )
 
 
diff --git a/yunke-server/migrations/versions/d8e9f0a1b2c3_message_owner_talker_time_index.py b/yunke-server/migrations/versions/d8e9f0a1b2c3_message_owner_talker_time_index.py
new file mode 100644
index 0000000..9aabaee
--- /dev/null
+++ b/yunke-server/migrations/versions/d8e9f0a1b2c3_message_owner_talker_time_index.py
@@ -0,0 +1,41 @@
+"""message 补无渠道前缀索引 (owner_account_id, talker_id, timestamp)
+
+Revision ID: d8e9f0a1b2c3
+Revises: c9d0e1f2a3b4
+Create Date: 2026-09-10
+
+背景:该回未回决赛圈点查在 channel=None(管理驾驶舱 action_counts)时
+无渠道前缀条件,现有索引全部以 channel 打头用不上——服务器 100 万行
+实测 dashboard 34~37s 撞前端 15s 超时;索引落地后 1.3~1.8s。
+幂等:sa.inspect 先查,存在即跳过(服务器已先行手工建同名索引,本迁移
+兜底对齐 schema 版本)。「模型+迁移双声明」防 autogenerate 反 DROP。
+"""
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "d8e9f0a1b2c3"
+down_revision: str | Sequence[str] | None = "c9d0e1f2a3b4"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+_IDX = "ix_message_owner_talker_time"
+
+
+def _has_index(bind) -> bool:
+    insp = sa.inspect(bind)
+    if not insp.has_table("message"):
+        return False
+    return _IDX in {ix["name"] for ix in insp.get_indexes("message")}
+
+
+def upgrade() -> None:
+    if not _has_index(op.get_bind()):
+        op.create_index(_IDX, "message",
+                         ["owner_account_id", "talker_id", "timestamp"])
+
+
+def downgrade() -> None:
+    if _has_index(op.get_bind()):
+        op.drop_index(_IDX, table_name="message")