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/ConflictCard.tsx

@@ -0,0 +1,119 @@
+"use client";
+
+import type { ReviewConflict } from "@/lib/review/sse";
+import type { DecisionDraft, Verdict } from "@/lib/review/decisions";
+
+interface ConflictCardProps {
+  index: number;
+  conflict: ReviewConflict;
+  draft: DecisionDraft;
+  missing: boolean;
+  onVerdict: (index: number, verdict: Verdict) => void;
+  onNote: (index: number, note: string) => void;
+  onJump: (index: number) => void;
+}
+
+const VERDICT_OPTIONS: { value: Verdict; label: string }[] = [
+  { value: "accept", label: "采纳改法" },
+  { value: "ignore", label: "忽略" },
+  { value: "manual", label: "手改" },
+];
+
+// 单个冲突报告卡（UX §6.4）：五类徽标 + where + refs + suggestion + 裁决三态。
+// 冲突=赭红；未决/缺判时加图标+文案（不单靠色，a11y §10）。
+export function ConflictCard({
+  index,
+  conflict,
+  draft,
+  missing,
+  onVerdict,
+  onNote,
+  onJump,
+}: ConflictCardProps) {
+  const resolved = draft.verdict !== null;
+  return (
+    <li
+      id={`conflict-card-${index}`}
+      className={`rounded border bg-panel p-4 ${
+        missing
+          ? "border-conflict ring-1 ring-conflict"
+          : resolved
+            ? "border-pass/40"
+            : "border-line"
+      }`}
+    >
+      <div className="flex items-start gap-3">
+        <span
+          className="shrink-0 rounded bg-[var(--color-conflict)]/10 px-2 py-0.5 text-xs text-conflict"
+          aria-hidden="true"
+        >
+          ⚠ {conflict.type}
+        </span>
+        <p className="flex-1 text-sm text-ink">{conflict.suggestion}</p>
+      </div>
+
+      <div className="mt-2 flex flex-wrap items-center gap-2 pl-1 text-xs text-ink-soft">
+        {conflict.where ? (
+          <button
+            type="button"
+            onClick={() => onJump(index)}
+            className="rounded border border-line px-2 py-0.5 hover:border-cinnabar hover:text-cinnabar"
+          >
+            ▸ 跳转 {conflict.where}
+          </button>
+        ) : null}
+        {conflict.refs.map((ref) => (
+          <span key={ref} className="font-mono">
+            ▸ {ref}
+          </span>
+        ))}
+      </div>
+
+      <fieldset className="mt-3">
+        <legend className="sr-only">冲突 {index + 1} 裁决</legend>
+        <div className="flex flex-wrap items-center gap-2">
+          {VERDICT_OPTIONS.map((opt) => {
+            const active = draft.verdict === opt.value;
+            return (
+              <button
+                key={opt.value}
+                type="button"
+                aria-pressed={active}
+                onClick={() => onVerdict(index, opt.value)}
+                className={`rounded px-3 py-1 text-xs ${
+                  active
+                    ? "bg-cinnabar text-panel"
+                    : "border border-line text-ink hover:border-cinnabar"
+                }`}
+              >
+                {opt.label}
+              </button>
+            );
+          })}
+          {resolved ? (
+            <span className="text-xs text-pass" aria-hidden="true">
+              ✓ 已裁决
+            </span>
+          ) : (
+            <span className="text-xs text-conflict">未裁决</span>
+          )}
+        </div>
+        {draft.verdict === "manual" ? (
+          <div className="mt-2">
+            <label htmlFor={`note-${index}`} className="sr-only">
+              手改说明
+            </label>
+            <input
+              id={`note-${index}`}
+              type="text"
+              value={draft.note}
+              onChange={(e) => onNote(index, e.target.value)}
+              placeholder="手改说明（可选）"
+              className="w-full rounded border border-line bg-bg px-3 py-1.5 text-sm text-ink focus:border-cinnabar focus:outline-none"
+            />
+          </div>
+        ) : null}
+      </fieldset>
+    </li>
+  );
+}