diff --git a/src/components/article-input-form.tsx b/src/components/article-input-form.tsx
index 49b0440..4d62a69 100644
--- a/src/components/article-input-form.tsx
+++ b/src/components/article-input-form.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import type { FormEvent } from "react";
+import type { Dispatch, FormEvent, SetStateAction } from "react";
 
 import type { PublishPlatform } from "../lib/domain/types";
 
@@ -15,7 +15,7 @@ export interface ArticleInputPayload {
 interface ArticleInputFormProps {
   value: ArticleInputPayload;
   isSubmitting: boolean;
-  onChange: (value: ArticleInputPayload) => void;
+  onChange: Dispatch<SetStateAction<ArticleInputPayload>>;
   onSubmit: () => void;
 }
 
@@ -36,7 +36,7 @@ export function ArticleInputForm({
     key: K,
     nextValue: ArticleInputPayload[K],
   ) {
-    onChange({ ...value, [key]: nextValue });
+    onChange((current) => ({ ...current, [key]: nextValue }));
   }
 
   function handleSubmit(event: FormEvent<HTMLFormElement>) {
diff --git a/src/lib/cases/types.ts b/src/lib/cases/types.ts
index 423fc52..1f1d90b 100644
--- a/src/lib/cases/types.ts
+++ b/src/lib/cases/types.ts
@@ -65,7 +65,7 @@ export interface ArticleCaseInputPayload {
   fact_card?: unknown;
 }
 
-export interface HumanCopyCaseInputPayload extends CopyOptimizationRequest {}
+export type HumanCopyCaseInputPayload = CopyOptimizationRequest;
 
 export interface ArticleResultVersionPayload {
   article: OptimizedArticle;
@@ -73,7 +73,7 @@ export interface ArticleResultVersionPayload {
   export_paths: Record<string, string>;
 }
 
-export interface HumanCopyResultVersionPayload extends CopyOptimizationResult {}
+export type HumanCopyResultVersionPayload = CopyOptimizationResult;
 
 export interface OptimizationResultVersion {
   id: string;
diff --git a/src/lib/db/d1-repository.ts b/src/lib/db/d1-repository.ts
index 7651ed5..8916e57 100644
--- a/src/lib/db/d1-repository.ts
+++ b/src/lib/db/d1-repository.ts
@@ -7,8 +7,6 @@ import type {
 } from "../calibration/types";
 import type {
   CaseInput,
-  CaseListFilters,
-  CaseMetadataPatch,
   OptimizationCase,
   OptimizationCaseStatus,
   OptimizationCaseType,
diff --git a/tests/e2e/sample-flow.spec.ts b/tests/e2e/sample-flow.spec.ts
index fa4a098..b8cb057 100644
--- a/tests/e2e/sample-flow.spec.ts
+++ b/tests/e2e/sample-flow.spec.ts
@@ -19,7 +19,7 @@ const reportDir =
   process.env.GEO_SAMPLE_REPORT_DIR ??
   join(repoRoot, "test-results", "geo-sample-flow", "manual");
 const baseURL = process.env.GEO_SAMPLE_BASE_URL ?? "http://127.0.0.1:3000";
-const apiAccessKey = process.env.API_ACCESS_KEY ?? "";
+const apiAccessKey = process.env.API_ACCESS_KEY ?? "local-dev-key";
 const timeoutMs = Number(process.env.GEO_SAMPLE_TIMEOUT_MS ?? "600000");
 const filter = process.env.GEO_SAMPLE_FILTER;
 const limit = Number(process.env.GEO_SAMPLE_LIMIT ?? "0");
diff --git a/tests/e2e/sample-flow/page-flow.ts b/tests/e2e/sample-flow/page-flow.ts
index af61c75..2298246 100644
--- a/tests/e2e/sample-flow/page-flow.ts
+++ b/tests/e2e/sample-flow/page-flow.ts
@@ -1,7 +1,12 @@
 import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
 import { join } from "node:path";
 
-import { expect, type APIRequestContext, type Page } from "@playwright/test";
+import {
+  expect,
+  type APIRequestContext,
+  type Locator,
+  type Page,
+} from "@playwright/test";
 
 import type {
   ArticleSample,
@@ -48,10 +53,15 @@ export async function runSamplePageFlow({
 
   await page.goto(baseURL);
   await fillIfVisible(page, "访问密钥", apiAccessKey);
-  await fillFirstAvailable(page, ["文章内容", "粘贴文章", "正文"], sample.input.body);
+  const bodyField = await fillFirstAvailable(
+    page,
+    ["文章内容", "粘贴文章", "正文"],
+    sample.input.body,
+  );
   await fillIfVisible(page, "图片描述或图片链接", sample.input.image_lines);
   await page.getByLabel("目标平台").selectOption(sample.input.platform);
   await fillIfVisible(page, "用户要求", sample.input.user_instructions);
+  await ensureSubmitEnabled(page, bodyField, sample.input.body);
 
   await page.getByRole("button", { name: "开始优化" }).click();
 
@@ -115,13 +125,31 @@ async function fillFirstAvailable(page: Page, labels: string[], value: string) {
     const locator = page.getByLabel(label);
     if ((await locator.count()) > 0) {
       await locator.fill(value);
-      return;
+      return locator;
     }
   }
 
   throw new Error(`none of these labels were found: ${labels.join(", ")}`);
 }
 
+async function ensureSubmitEnabled(
+  page: Page,
+  bodyField: Locator,
+  body: string,
+) {
+  const submitButton = page.getByRole("button", { name: "开始优化" });
+  for (let attempt = 0; attempt < 4; attempt += 1) {
+    await bodyField.fill("");
+    await bodyField.fill(body);
+    if (await submitButton.isEnabled()) {
+      return;
+    }
+    await page.waitForTimeout(250);
+  }
+  await expect(bodyField).toHaveValue(body);
+  await expect(submitButton).toBeEnabled();
+}
+
 async function fillIfVisible(page: Page, label: string, value: string) {
   const locator = page.getByLabel(label);
   if ((await locator.count()) > 0) {