feat: 新增 target description 字段，收紧 id/name 长度，调整延迟列和名称列

tests/web/constants/target-table-columns.test.ts

@@ -20,6 +20,7 @@ function getColumn(columns: Array<PrimaryTableCol<TargetStatus>>, colKey: string
 function makeTarget(overrides: Partial<TargetStatus> = {}): TargetStatus {
   return {
     currentStreak: null,
+    description: null,
     group: "default",
     id: "1",
     interval: "5s",
@@ -119,7 +120,40 @@ describe("createTargetTableColumns", () => {
       rowIndex: 0,
     });
 
-    expect(element.props.children).toBe("9999+ms");
+    expect(element.props.children).toBe("9999+");
     expect(element.props.className).toContain("latency-value");
   });
+
+  test("延迟列标题为 延迟(ms)", () => {
+    const latencyColumn = getColumn(createTargetTableColumns(["http"]), "latestCheck.durationMs");
+    expect(latencyColumn.title).toBe("延迟(ms)");
+  });
+
+  test("延迟列正常值不包含 ms 单位", () => {
+    const latencyColumn = getColumn(createTargetTableColumns(["http"]), "latestCheck.durationMs");
+    const renderCell = latencyColumn.cell as (params: PrimaryTableCellParams<TargetStatus>) => {
+      props: { children: string; className: string };
+    };
+    const element = renderCell({
+      col: latencyColumn,
+      colIndex: 6,
+      row: makeTarget({
+        latestCheck: {
+          durationMs: 123,
+          failure: null,
+          matched: true,
+          statusDetail: "200",
+          timestamp: "2026-01-01T00:00:00.000Z",
+        },
+      }),
+      rowIndex: 0,
+    });
+    expect(element.props.children).toBe("123");
+  });
+
+  test("名称列无排序配置", () => {
+    const nameColumn = getColumn(createTargetTableColumns(["http"]), "name");
+    expect(nameColumn.sorter).toBeUndefined();
+    expect(nameColumn.sortType).toBeUndefined();
+  });
 });