feat: M2 — 写→审(一致性)→裁决→验收(事务)；未决冲突禁验收

- 续审 Agent 声明(AgentSpec) + 结构化输出契约(ContinuityReview/Conflict 五类)
- LangGraph 并行审子图(可扩四审) + collect 落 chapter_reviews 留痕 + review SSE(section/conflict)
- 验收-side Repository：章节 accepted 版本晋升 + digest append-only + 审稿留痕/裁决
- API：review(SSE) + reviews 历史 + accept(单原子事务：晋升 version + 终稿 digest + 裁决留痕)
- 冲突 gate：未决裁决拦截(CONFLICT_UNRESOLVED)；digest 从终稿提炼(不变量#4)
- 前端：审稿报告页 + 冲突就地标注 + 裁决(采纳/忽略/手改) + 未决禁验收 + 「本次将更新」清单
- M2 E2E：真实 DB + 多档位 mock 网关零 token 走通 写→审→裁决→验收→摘要入库
- 多 agent 协同台账(PROGRESS.md) + 共享记忆(memory/contracts·decisions·gotchas)

apps/web/components/review/AcceptPanel.tsx

@@ -0,0 +1,76 @@
+"use client";
+
+import type { AcceptResponse } from "@/lib/api/types";
+
+interface AcceptPanelProps {
+  conflictCount: number;
+  unresolvedCount: number;
+  accepting: boolean;
+  result: AcceptResponse | null;
+  onAccept: () => void;
+}
+
+// 验收 gate（UX §9 / §8.4）：未决禁验收（置灰 + 文案），验收后呈现「本次将更新」清单。
+export function AcceptPanel({
+  conflictCount,
+  unresolvedCount,
+  accepting,
+  result,
+  onAccept,
+}: AcceptPanelProps) {
+  const blocked = unresolvedCount > 0;
+
+  if (result) {
+    return (
+      <div className="rounded border border-pass/50 bg-panel p-4">
+        <h3 className="mb-2 text-sm font-semibold text-pass">本章已验收</h3>
+        <ul className="space-y-1 text-xs text-ink-soft">
+          <li>
+            晋升版次：
+            <span className="font-mono text-ink">v{result.accepted_version}</span>
+          </li>
+          <li>
+            章节摘要：{result.digest_added ? "已新增一行" : "未变更"}
+          </li>
+          <li>
+            裁决写回：
+            <span className="font-mono text-ink">
+              {result.decisions_recorded}
+            </span>{" "}
+            条
+          </li>
+          {result.review_id ? (
+            <li className="truncate">
+              留痕：<span className="font-mono">{result.review_id}</span>
+            </li>
+          ) : null}
+        </ul>
+      </div>
+    );
+  }
+
+  return (
+    <div className="rounded border border-line bg-panel p-4">
+      {blocked ? (
+        <p className="mb-2 text-xs text-conflict" role="status">
+          尚有 {unresolvedCount} 项冲突未裁决，处理完才能验收。
+        </p>
+      ) : (
+        <p className="mb-2 text-xs text-ink-soft">
+          {conflictCount === 0
+            ? "无冲突，可直接验收。"
+            : "全部冲突已裁决，可验收本章。"}
+        </p>
+      )}
+      <button
+        type="button"
+        onClick={onAccept}
+        disabled={blocked || accepting}
+        aria-disabled={blocked || accepting}
+        className="w-full rounded bg-cinnabar px-4 py-2 text-sm text-panel hover:opacity-90 disabled:cursor-not-allowed disabled:opacity-40"
+      >
+        {accepting ? "验收中…" : "全部处理完 → 验收本章"}
+      </button>
+    </div>
+  );
+}