feat(splash): load latest chat message

src/app/splash/__tests__/splash-latest-message.helpers.test.ts

@@ -0,0 +1,67 @@
+import { describe, expect, it } from "vitest";
+
+import { getSplashLatestMessagePreview } from "@/lib/chat/splash_latest_message_preview";
+
+describe("getSplashLatestMessagePreview", () => {
+  it("uses text content for text messages", () => {
+    expect(
+      getSplashLatestMessagePreview({
+        type: "text",
+        content: " Come closer? ",
+        audioUrl: null,
+        image: { type: null, url: null },
+      }),
+    ).toBe("Come closer?");
+  });
+
+  it("uses image placeholder for image messages", () => {
+    expect(
+      getSplashLatestMessagePreview({
+        type: "image",
+        content: "",
+        image: { type: "elio_schedule", url: null },
+      }),
+    ).toBe("[图片]");
+  });
+
+  it("uses image placeholder when the image url exists", () => {
+    expect(
+      getSplashLatestMessagePreview({
+        type: "text",
+        content: "",
+        image: { type: null, url: "https://example.com/image.jpg" },
+      }),
+    ).toBe("[图片]");
+  });
+
+  it("uses voice placeholder for voice messages", () => {
+    expect(
+      getSplashLatestMessagePreview({
+        type: "audio",
+        content: "",
+        audioUrl: "https://example.com/voice.mp3",
+      }),
+    ).toBe("[语音]");
+  });
+
+  it("uses voice placeholder for locked voice messages", () => {
+    expect(
+      getSplashLatestMessagePreview({
+        type: "text",
+        content: "",
+        lockDetail: { reason: "voice_message" },
+      }),
+    ).toBe("[语音]");
+  });
+
+  it("falls back when the latest message has no displayable content", () => {
+    expect(
+      getSplashLatestMessagePreview({
+        type: "text",
+        content: "   ",
+        image: { type: null, url: null },
+        audioUrl: null,
+      }),
+    ).toBe("[消息]");
+  });
+});