feat: support image inputs in assistant tests

frontend/src/components/assistant-editor/debug-auto-test.tsx

@@ -51,6 +51,7 @@ import {
 import {
   batchRunsApi,
   modelResourcesApi,
+  testAssetsApi,
   testCasesApi,
   testSuitesApi,
   type ModelResource,
@@ -101,7 +102,7 @@ function isRunFinished(run: BatchRunSnapshot): boolean {
 
 function runnableMessage(item: TestCase): string {
   if (item.inputMode !== "fixed_script_text") {
-    return "当前自动测试仅支持固定脚本 · 文字";
+    return "当前自动测试仅支持固定脚本 · 多模态";
   }
   return getTestCaseValidationMessage(item) ?? "";
 }
@@ -653,6 +654,16 @@ function AutoTestTimeline({
         role: "user",
         label: `固定输入 · ${turn.index + 1} / ${maxTurns}`,
         content: turn.userInput,
+        attachments: turn.image
+          ? [
+              {
+                id: turn.image.assetId,
+                type: "image",
+                url: testAssetsApi.contentUrl(turn.image.assetId),
+                alt: turn.image.filename,
+              },
+            ]
+          : undefined,
       },
     });
     items.push({