fix(dialogs): F03 证据弹窗同期间重复点击不再停留在加载中

- 第 0 页重复点击当前已选期间直接返回，不清空列表、不重复请求；
  第二页点击当前期间回到第一页并刷新
- 请求失败显示错误并提供“重试”按钮；空结果显示空态行而不是过期数据
- E2E 覆盖：重复点击、快速本期/基期切换、第二页切期间、失败重试、空列表

tests/e2e/workspace.spec.ts

@@ -30,7 +30,9 @@ test("桌面：真实导入、异常、下钻、证据、设置、Copilot、导
   });
   await uploaded;
   const dialog = page.getByRole("dialog");
-  await expect(dialog.getByRole("heading", { name: "确认导入字段" })).toBeVisible();
+  await expect(
+    dialog.getByRole("heading", { name: "确认导入字段" }),
+  ).toBeVisible();
   await dialog.getByRole("button", { name: "确认并导入" }).click();
   await expect(
     page.getByRole("heading", { name: "集团经营总览", exact: true }),
@@ -85,14 +87,27 @@ test("桌面：真实导入、异常、下钻、证据、设置、Copilot、导
   await expect(evidenceDialog).toContainText("1 条");
   await expect(evidenceDialog).toContainText("2026-08");
   await expect(evidenceDialog).toContainText("CSV");
-  await evidenceDialog.getByRole("button", { name: "基期", exact: true }).click();
+  await evidenceDialog
+    .getByRole("button", { name: "基期", exact: true })
+    .click();
   await expect(evidenceDialog).toContainText("2025-08");
   await evidenceDialog.getByLabel("关闭", { exact: true }).click();
   const evidenceOffsets: number[] = [];
+  let evidenceFailOnce = false;
+  let evidenceEmpty = false;
   await page.route("**/api/datasets/*/evidence", async (route) => {
     const request = route.request().postDataJSON() as { offset?: number };
     const offset = request.offset || 0;
+    if (evidenceFailOnce) {
+      evidenceFailOnce = false;
+      await route.fulfill({ status: 500, json: { error: "服务暂不可用" } });
+      return;
+    }
     evidenceOffsets.push(offset);
+    if (evidenceEmpty) {
+      await route.fulfill({ json: { total: 0, sheet: "CSV", rows: [] } });
+      return;
+    }
     const count = offset === 0 ? 50 : 1;
     await route.fulfill({
       json: {
@@ -111,10 +126,51 @@ test("桌面：真实导入、异常、下钻、证据、设置、Copilot、导
   });
   await page.getByLabel("查看医生A证据", { exact: true }).click();
   await expect(evidenceDialog).toContainText("第 1-50 条，共 51 条");
-  await evidenceDialog.getByRole("button", { name: "下一页", exact: true }).click();
+  await evidenceDialog
+    .getByRole("button", { name: "下一页", exact: true })
+    .click();
   await expect(evidenceDialog).toContainText("第 51-51 条，共 51 条");
   await expect(evidenceDialog).toContainText("2026-09");
   expect(evidenceOffsets).toEqual([0, 50]);
+  // F03 回归：第二页时重复点击当前期间应回到第一页并重新加载
+  await evidenceDialog
+    .getByRole("button", { name: "本期", exact: true })
+    .click();
+  await expect(evidenceDialog).toContainText("第 1-50 条，共 51 条");
+  expect(evidenceOffsets).toEqual([0, 50, 0]);
+  // F03 回归：第一页重复点击当前期间不清空列表、不重新请求、不停在“加载中”
+  await evidenceDialog
+    .getByRole("button", { name: "本期", exact: true })
+    .click();
+  await expect(evidenceDialog).toContainText("第 1-50 条，共 51 条");
+  await expect(evidenceDialog).not.toContainText("加载中");
+  expect(evidenceOffsets).toEqual([0, 50, 0]);
+  // F03 回归：快速本期/基期切换最终停留在当前期间的数据
+  await evidenceDialog
+    .getByRole("button", { name: "基期", exact: true })
+    .click();
+  await evidenceDialog
+    .getByRole("button", { name: "本期", exact: true })
+    .click();
+  await expect(evidenceDialog).toContainText("第 1-50 条，共 51 条");
+  await expect(evidenceDialog).not.toContainText("加载中");
+  // F03 回归：请求失败显示错误并可重试恢复
+  evidenceFailOnce = true;
+  await evidenceDialog
+    .getByRole("button", { name: "下一页", exact: true })
+    .click();
+  await expect(evidenceDialog).toContainText("服务暂不可用");
+  await expect(evidenceDialog).toContainText("加载失败");
+  await evidenceDialog.getByRole("button", { name: "重试" }).click();
+  await expect(evidenceDialog).toContainText("第 51-51 条，共 51 条");
+  // F03 回归：空结果显示空态而不是过期数据或加载中
+  evidenceEmpty = true;
+  await evidenceDialog
+    .getByRole("button", { name: "上一页", exact: true })
+    .click();
+  await expect(evidenceDialog).toContainText("本期范围内没有数据");
+  await expect(evidenceDialog).toContainText("共 0 条");
+  await expect(evidenceDialog).not.toContainText("加载中");
   await evidenceDialog.getByLabel("关闭", { exact: true }).click();
   await page
     .getByRole("navigation", { name: "分析路径" })
@@ -164,38 +220,53 @@ test("桌面：真实导入、异常、下钻、证据、设置、Copilot、导
   await page.route("**/formula-design", async (route) => {
     designCalls++;
     await route.fulfill({
-      json: designCalls === 1
-        ? { complete: false, questions: ["缺失值和零分母如何处理？"], column: null }
-        : {
-            complete: true,
-            questions: [],
-            column: {
-              name: "收入成本差",
-              meaning: "实际收入减成本",
-              scope: "所选分组与期间",
-              missing: "结果不可用（#N/A）；零分母不可用",
-              expression: {
-                operator: "subtract",
-                left: { metric: "revenue" },
-                right: { metric: "cost" },
+      json:
+        designCalls === 1
+          ? {
+              complete: false,
+              questions: ["缺失值和零分母如何处理？"],
+              column: null,
+            }
+          : {
+              complete: true,
+              questions: [],
+              column: {
+                name: "收入成本差",
+                meaning: "实际收入减成本",
+                scope: "所选分组与期间",
+                missing: "结果不可用（#N/A）；零分母不可用",
+                expression: {
+                  operator: "subtract",
+                  left: { metric: "revenue" },
+                  right: { metric: "cost" },
+                },
               },
             },
-          },
     });
   });
   await page.getByRole("button", { name: "生成公式工作簿" }).click();
   const formulaDialog = page.getByRole("dialog", { name: "生成公式工作簿" });
   await formulaDialog.getByRole("checkbox").check();
-  await formulaDialog.getByLabel("列计算描述").fill("新增收入成本差，缺失或零分母显示不可用");
+  await formulaDialog
+    .getByLabel("列计算描述")
+    .fill("新增收入成本差，缺失或零分母显示不可用");
   await formulaDialog.getByRole("button", { name: "发送描述" }).click();
   await expect(formulaDialog).toContainText("缺失值和零分母如何处理？");
-  await formulaDialog.getByLabel("列计算描述").fill("缺失项和零分母都按不可用处理");
+  await formulaDialog
+    .getByLabel("列计算描述")
+    .fill("缺失项和零分母都按不可用处理");
   await formulaDialog.getByRole("button", { name: "发送描述" }).click();
-  await formulaDialog.getByRole("button", { name: "确认并生成公式工作簿" }).click();
-  await expect(formulaDialog.getByRole("status")).toContainText("生成完成", { timeout: 30000 });
+  await formulaDialog
+    .getByRole("button", { name: "确认并生成公式工作簿" })
+    .click();
+  await expect(formulaDialog.getByRole("status")).toContainText("生成完成", {
+    timeout: 30000,
+  });
   const formulaDownload = page.waitForEvent("download");
   await formulaDialog.getByRole("button", { name: "下载公式工作簿" }).click();
-  expect((await formulaDownload).suggestedFilename()).toBe("traceiq-formula-analysis.xlsx");
+  expect((await formulaDownload).suggestedFilename()).toBe(
+    "traceiq-formula-analysis.xlsx",
+  );
   await formulaDialog.getByLabel("关闭").click();
 });
 test("手机：登录、总览、设置、Copilot 布局无横向溢出", async ({ page }) => {