diff --git a/.github/workflows/apply-supabase-profile-migrations.yml b/.github/workflows/apply-supabase-profile-migrations.yml
index b479a410..db86d9ea 100644
--- a/.github/workflows/apply-supabase-profile-migrations.yml
+++ b/.github/workflows/apply-supabase-profile-migrations.yml
@@ -47,6 +47,7 @@ jobs:
             frontend/supabase/migrations/20260718102000_recover_missing_profile_rows.sql \
             frontend/supabase/migrations/20260718103000_profile_birth_time_declaration_grants.sql \
             frontend/supabase/migrations/20260718104000_chart_profiles_upsert_id_grant.sql \
+            frontend/supabase/migrations/20260721100000_chat_sessions_delete_grant.sql \
             "$DEPLOY_USER@$DEPLOY_HOST:$DEPLOY_PATH/tmp/profile-migrations/"
 
       - name: Apply profile migrations using VPS database URL
@@ -76,7 +77,8 @@ jobs:
             tmp/profile-migrations/20260718100000_repair_missing_chart_profiles.sql \
             tmp/profile-migrations/20260718102000_recover_missing_profile_rows.sql \
             tmp/profile-migrations/20260718103000_profile_birth_time_declaration_grants.sql \
-            tmp/profile-migrations/20260718104000_chart_profiles_upsert_id_grant.sql
+            tmp/profile-migrations/20260718104000_chart_profiles_upsert_id_grant.sql \
+            tmp/profile-migrations/20260721100000_chat_sessions_delete_grant.sql
           do
             echo "applying $(basename "$SQL_FILE")"
             cat "$SQL_FILE" | docker run --rm -i postgres:16-alpine \
diff --git a/frontend/src/app/api/sessions/[id]/route.ts b/frontend/src/app/api/sessions/[id]/route.ts
new file mode 100644
index 00000000..5c0919f7
--- /dev/null
+++ b/frontend/src/app/api/sessions/[id]/route.ts
@@ -0,0 +1,28 @@
+import { NextResponse } from "next/server";
+import { createServerSupabaseClient } from "@/lib/supabase/server";
+import { isSupabaseConfigurationError } from "@/lib/supabase/config";
+
+type RouteContext = { params: Promise<{ id: string }> };
+
+export async function DELETE(_request: Request, context: RouteContext) {
+  try {
+    const { id } = await context.params;
+    const supabase = await createServerSupabaseClient();
+    const { data: { user } } = await supabase.auth.getUser();
+    if (!user) return NextResponse.json({ error: "请先登录" }, { status: 401 });
+
+    const { count, error } = await supabase
+      .from("chat_sessions")
+      .delete({ count: "exact" })
+      .eq("id", id)
+      .eq("user_id", user.id);
+    if (error) throw error;
+    if (count !== 1) return NextResponse.json({ error: "聊天记录不存在或无权删除" }, { status: 404 });
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    if (isSupabaseConfigurationError(error)) {
+      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+    }
+    return NextResponse.json({ error: error instanceof Error ? error.message : "删除聊天记录失败" }, { status: 500 });
+  }
+}
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index 81b80a66..d1d1d054 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -1253,9 +1253,9 @@ export default function Home() {
     setArchivedSessionIds((current) => current.filter((id) => id !== session.id));
     if (activeSessionId === session.id) setActiveSessionId(nextSessions[0]?.id ?? "");
     try {
-      const supabase = createBrowserSupabaseClient();
-      const { error } = await supabase.from("chat_sessions").delete().eq("id", session.id).eq("user_id", account.user.id);
-      if (error) throw error;
+      const response = await fetch(`/api/sessions/${encodeURIComponent(session.id)}`, { method: "DELETE" });
+      const payload = await response.json().catch(() => null) as { error?: string } | null;
+      if (!response.ok) throw new Error(payload?.error || "删除聊天记录失败");
     } catch (caught) {
       setSessions(previousSessions);
       setComposerNotice(caught instanceof Error ? `删除失败：${caught.message}` : "删除失败");
diff --git a/frontend/supabase/migrations/20260721100000_chat_sessions_delete_grant.sql b/frontend/supabase/migrations/20260721100000_chat_sessions_delete_grant.sql
new file mode 100644
index 00000000..bb7aad04
--- /dev/null
+++ b/frontend/supabase/migrations/20260721100000_chat_sessions_delete_grant.sql
@@ -0,0 +1,5 @@
+begin;
+
+grant delete on table public.chat_sessions to authenticated;
+
+commit;
diff --git a/tests/test_session_management_entrypoints.py b/tests/test_session_management_entrypoints.py
index a9a550c8..ce0346fd 100644
--- a/tests/test_session_management_entrypoints.py
+++ b/tests/test_session_management_entrypoints.py
@@ -3,10 +3,13 @@ from pathlib import Path
 
 PAGE = Path("frontend/src/app/page.tsx")
 STYLES = Path("frontend/src/app/globals.css")
+SESSION_ROW = Path("frontend/src/components/sidebar-session-row.tsx")
+SESSION_DELETE_ROUTE = Path("frontend/src/app/api/sessions/[id]/route.ts")
+SESSION_DELETE_MIGRATION = Path("frontend/supabase/migrations/20260721100000_chat_sessions_delete_grant.sql")
 
 
 def test_chat_history_management_actions_are_exposed() -> None:
-    source = PAGE.read_text(encoding="utf-8") + STYLES.read_text(encoding="utf-8")
+    source = PAGE.read_text(encoding="utf-8") + STYLES.read_text(encoding="utf-8") + SESSION_ROW.read_text(encoding="utf-8")
     for expected in (
         "renameSession",
         "deleteSession",
@@ -28,5 +31,15 @@ def test_chat_history_management_actions_are_exposed() -> None:
         "恢复",
         "删除",
         "转发",
+        'fetch(`/api/sessions/${encodeURIComponent(session.id)}`',
     ):
         assert expected in source
+
+
+def test_chat_session_delete_is_server_controlled_and_granted() -> None:
+    route = SESSION_DELETE_ROUTE.read_text(encoding="utf-8")
+    migration = SESSION_DELETE_MIGRATION.read_text(encoding="utf-8")
+    assert 'from("chat_sessions")' in route
+    assert '.eq("user_id", user.id)' in route
+    assert 'count !== 1' in route
+    assert 'grant delete on table public.chat_sessions to authenticated' in migration.lower()