Improve live analysis stability and video clip drafting

tests/e2e/app.spec.ts

@@ -35,6 +35,16 @@ test("videos page renders video library items", async ({ page }) => {
   await expect(page.getByTestId("video-card")).toHaveCount(1);
 });
 
+test("videos page opens lightweight clip editor", async ({ page }) => {
+  await installAppMocks(page, { authenticated: true });
+
+  await page.goto("/videos");
+  await page.getByRole("button", { name: "轻剪辑" }).click();
+  await expect(page.getByText("PC 轻剪辑工作台")).toBeVisible();
+  await expect(page.locator("text=建议保留：正手启动").first()).toBeVisible();
+  await expect(page.getByRole("button", { name: "导出草稿" })).toBeVisible();
+});
+
 test("live camera page exposes camera startup controls", async ({ page }) => {
   await installAppMocks(page, { authenticated: true });