feat(rectification): remove the rectification regenerate button and endpoint (BUG-1056)

T2 of TASK-rectification-grounding-20260927 (product decision P1).
The rectification 「重试（重新生成）」 was a blind agent.generate rewrite that
persisted unchecked text (invented range / fit rate reproduced). Removed:
the regenerate route, regenerate-turn.ts, the regeneration agent and its
read-only tool set, the client regenerate action/state and the
regenerating/canRegenerate props. ChatMessageActions renders the regenerate
button only when onRegenerate is passed; ordinary consultation is unchanged.
The DB function regenerate_agentic_rectification_turn is kept (AGENTS §7.6,
retire in a later round). DESIGN.md / VOICE.md updated; source-contract
tests follow with 原值/新值/原因 notes.

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

frontend/tests/rectification-agentic-entry.test.ts

@@ -1,5 +1,5 @@
 import assert from "node:assert/strict";
-import { readFileSync } from "node:fs";
+import { existsSync, readFileSync } from "node:fs";
 import test from "node:test";
 import { homeSurface as page } from "./home-surface.ts";
 import { createElement } from "react";
@@ -86,12 +86,12 @@ const upgradeSkillRoute = readFileSync(
   new URL("../src/app/api/rectification/cases/[caseId]/upgrade-skill/route.ts", import.meta.url),
   "utf8",
 );
-const regenerateRoute = readFileSync(
-  new URL(
-    "../src/app/api/rectification/cases/[caseId]/turns/[turnId]/regenerate/route.ts",
-    import.meta.url,
-  ),
-  "utf8",
+// 原值: 模块级读取 cases/[caseId]/turns/[turnId]/regenerate/route.ts 供动作条用例断言。
+// 新值: 不再读取；动作条用例改为断言该路由不存在、校正行不传 onRegenerate。
+// 原因: BUG-1056（TASK-rectification-grounding-20260927 P1）删除生时校正的重新生成接口与按钮。
+const regenerateRoutePath = new URL(
+  "../src/app/api/rectification/cases/[caseId]/turns/[turnId]/regenerate/route.ts",
+  import.meta.url,
 );
 
 test("birth-time rectification entry mounts the V9 case-ref chat", () => {
@@ -461,18 +461,25 @@ test("rectification keeps receipts for the varga sentence and shows live tool pr
   assert.match(styles, /\.message-thinking-body/);
 });
 
-test("completed Agent replies restore feedback, copy and safe in-place regeneration actions", () => {
+// 原值: 名称「… restore feedback, copy and safe in-place regeneration actions」；断言容器里有
+//       /turns/.../regenerate 请求与 randomUUID 请求号、重新生成路由不计费且按绑定 Skill 取包。
+// 新值: 名称改为「feedback and copy, no regeneration」；断言校正行不传 onRegenerate、容器不再请求
+//       重新生成、路由文件不存在。赞 / 踩 / 复制与普通对话的「重新生成回答」按钮断言保留。
+// 原因: BUG-1056（TASK-rectification-grounding-20260927 P1）删除生时校正的重新生成接口与按钮（盲写且不校验就落库）。
+test("completed Agent replies restore feedback and copy, no regeneration (BUG-1056)", () => {
   for (const label of ["赞", "踩", "复制回答", "重新生成回答"]) {
     assert.match(messageActions, new RegExp(`aria-label="${label}"`));
   }
+  assert.match(messageActions, /\{onRegenerate && \(/);
   // 原值: `<ChatMessageActions` 写在容器 messages.map 里。
   // 新值: 动作条随行组件抽出；容器仍切换 feedback。
   // 原因: BUG-725 动作回调走 actionsRef，组件本身仍要渲染动作条。
   assert.match(messageEntry, /<ChatMessageActions/);
   assert.match(chat, /toggleRectificationFeedback/);
   assert.match(chat, /navigator\.clipboard\.writeText\(copyTextForMessage\(message\.text, message\.question\)\)/);
-  assert.match(chat, /\/turns\/\$\{encodeURIComponent\(message\.turnId\)\}\/regenerate/);
-  assert.match(chat, /requestId: globalThis\.crypto\.randomUUID\(\)/);
+  assert.doesNotMatch(chat, /\/regenerate/);
+  assert.doesNotMatch(messageEntry, /onRegenerate|canRegenerate|regenerat/);
+  assert.equal(existsSync(regenerateRoutePath), false);
 
   const messageRender = chat.slice(
     chat.indexOf("{messages.map((message) => {"),
@@ -486,13 +493,6 @@ test("completed Agent replies restore feedback, copy and safe in-place regenerat
   assert.doesNotMatch(messageEntry, /<CompletedActivityReceipt/);
 
   assert.doesNotMatch(chat, /send\("message",\s*(?:oldText|previousText)/);
-  assert.doesNotMatch(regenerateRoute, /consultation-billing|reserveConsultation|billing\./);
-  assert.match(regenerateRoute, /loadV9CaseSkillIdentity\(accounting, user\.id, caseId\)/);
-  assert.match(regenerateRoute, /resolveExactSkillPackage\(/);
-  assert.match(regenerateRoute, /skillPackage\.sourceCommit !== boundIdentity\.sourceCommit/);
-  assert.match(regenerateRoute, /getRectificationV9RegenerationAgent\([\s\S]*skillPackage\)/);
-  assert.match(regenerateRoute, /regenerateV9AssistantTurn/);
-  assert.match(regenerateRoute, /skillPackage,/);
 });
 
 test("candidate state renders from the snapshot API and never from sentinels", () => {