refactor(rectification): split the chat component into hooks, parameter functions and blocks

Move-only (TASK-rectification-code-split-20260926 T1/T4). No behavior, API,
copy, DB, Skill or scoring change.

- rectification-agentic-chat.tsx: 2043 -> 737 lines; component body
  1625 -> 630; useState 35 -> 12, useRef 16 -> 9, effects 9 -> 5,
  useCallback 12 -> 6.
- Snapshot sync -> hooks/use-rectification-case-snapshot.ts; board layout
  and live label clock -> two small hooks.
- send / submitStructuredChoice / acceptCandidate bodies ->
  lib/rectification-chat-{turn,choice,accept}-run.ts parameter functions
  (bodies verbatim, deps destructured to the same names); copy/regenerate,
  question repair, pure transcript and snapshot helpers and the per-render
  view derivation -> lib/rectification-chat-*.ts (no React hooks).
- Question-gap blocks and the read-only range line ->
  components/rectification-question-gap-notices.tsx.
- Dependency arrays kept exactly as before (lint warnings +3, listed in
  PROGRESS); no dep added to appease the linter.
- Tests: whole-source contracts read tests/rectification-chat-surface.ts
  (container + split files, like home-surface.ts); slices of moved code now
  call the extracted functions or render the extracted block, each with a
  原值/新值/原因 comment. New tests/rectification-growth-contract.test.ts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8

frontend/tests/chat-composer-queue.test.ts

@@ -14,13 +14,13 @@ import {
 } from "../src/lib/queued-draft.ts";
 import { chatReplyAnnouncer } from "../src/lib/chat-reply-announcement.ts";
 import { RECTIFICATION_STOPPED_NOTICE } from "../src/lib/rectification-surface-state.ts";
+import { rectificationChatSurface } from "./rectification-chat-surface.ts";
+import { abortWiringOf } from "./rectification-chat-run-fixtures.ts";
 
 const page = readFileSync(new URL("../src/app/(app)/page.tsx", import.meta.url), "utf8");
 const composer = readFileSync(new URL("../src/components/chat-composer.tsx", import.meta.url), "utf8");
-const rectification = readFileSync(
-  new URL("../src/components/rectification-agentic-chat.tsx", import.meta.url),
-  "utf8",
-);
+// 原值: 读 rectification-agentic-chat.tsx 单文件。新值: rectificationChatSurface（容器 + 拆出的 hook / 参数函数 / 块，见 rectification-chat-surface.ts）。原因: TASK-rectification-code-split-20260926 只搬不改，整文件断言跟着代码走；切片断言另行改为调用函数。
+const rectification = rectificationChatSurface;
 const consultationRun = readFileSync(
   new URL("../src/hooks/use-consultation-run.ts", import.meta.url),
   "utf8",
@@ -136,7 +136,7 @@ test("a queued card renders above the live textarea", () => {
   assert.match(html, /还想再问一句/);
 });
 
-test("rectification abort settles as stopped, not a failed alert", () => {
+test("rectification abort settles as stopped, not a failed alert", async () => {
   assert.match(rectification, /stopped: true/);
   assert.match(rectification, /failed: false,\s*stopped: true/);
   assert.doesNotMatch(rectification, /if \(raw\.trim\(\)\) setError\(RECTIFICATION_STOPPED_NOTICE\)/);
@@ -149,18 +149,18 @@ test("rectification abort settles as stopped, not a failed alert", () => {
   assert.match(messageRow, /className="message-stopped-notice"/);
   assert.equal(RECTIFICATION_STOPPED_NOTICE, "已停止，已生成的内容保留；本次不会扣点。");
   assert.match(rectification, /signal: abortController\.signal/);
-  const choiceFetch = rectification.slice(
-    rectification.indexOf("const submitStructuredChoice"),
-    rectification.indexOf("const acceptCandidate"),
-  );
-  assert.match(choiceFetch, /runAbort\.current = abortController/);
-  assert.match(choiceFetch, /signal: abortController\.signal/);
-  const adoptFetch = rectification.slice(
-    rectification.indexOf("const acceptCandidate"),
-    rectification.indexOf("async function copyMessage"),
-  );
-  assert.match(adoptFetch, /runAbort\.current = abortController/);
-  assert.match(adoptFetch, /signal: abortController\.signal/);
+  // 原值: 从 chat 源码切 submitStructuredChoice / acceptCandidate 两段，各匹配 `runAbort.current = abortController` 与 `signal: abortController.signal`。
+  // 新值: 调用 runRectificationStructuredChoice / runRectificationCandidateAccept（假 fetch）：请求带的 signal
+  //       就是 runAbort 里那个控制器的（停止按钮能掐断它），结束后 runAbort 清空。
+  // 原因: TASK-rectification-code-split-20260926 两段函数体原样搬进参数函数；行为断言覆盖接线本身。
+  const choiceWiring = await abortWiringOf("choice");
+  assert.equal(choiceWiring.url, "/api/rectification/agent");
+  assert.equal(choiceWiring.signalMatchesRunAbort, true);
+  assert.equal(choiceWiring.runAbortCleared, true);
+  const adoptWiring = await abortWiringOf("accept");
+  assert.match(adoptWiring.url, /\/api\/rectification\/cases\/[^/]+\/candidates\/accept$/);
+  assert.equal(adoptWiring.signalMatchesRunAbort, true);
+  assert.equal(adoptWiring.runAbortCleared, true);
   assert.equal(chatReplyAnnouncer("stopped"), "chat_notice_toast");
   assert.doesNotMatch(
     rectification.slice(rectification.indexOf("{error &&"), rectification.indexOf("{readonly &&")),