feat(ux): R1+R2 审稿裁决人体学 — 冲突卡内联片段 + 分组/排序/跳下一条/主次按钮

R1: 新 lib/review/snippet.ts 从 where 解析段号取终稿命中段预览，ConflictCard 渲染引用块。
R2: 新 lib/review/grouping.ts 按 type 分组+严重度排序（仅改显示顺序，保留原始 index 守 conflict_index 不变量），组计数徽标、跳到下一条未裁决（环回）、采纳改法主按钮/忽略手改次级。
TDD: snippet 8 测 + grouping 10 测。前端门禁绿: lint/tsc/vitest 201/build。

apps/web/components/review/ConflictCard.tsx

@@ -8,17 +8,27 @@ interface ConflictCardProps {
   conflict: ReviewConflict;
   draft: DecisionDraft;
   missing: boolean;
+  // R1：命中段内联预览（无段号/越界时为 null，回退到「跳转」按钮）。
+  snippet: string | null;
   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" },
+// R2：采纳改法=朱砂主按钮（primary），忽略/手改=次级（secondary），不再三者同权。
+const VERDICT_OPTIONS: { value: Verdict; label: string; primary: boolean }[] = [
+  { value: "accept", label: "采纳改法", primary: true },
+  { value: "ignore", label: "忽略", primary: false },
+  { value: "manual", label: "手改", primary: false },
 ];
 
+// 裁决按钮样式：激活=朱砂填充；未激活的主按钮=朱砂描边强调，次级=低对比描边。
+function verdictClass(active: boolean, primary: boolean): string {
+  if (active) return "bg-cinnabar text-panel";
+  if (primary) return "border border-cinnabar text-cinnabar hover:bg-cinnabar/10";
+  return "border border-line text-ink-soft hover:border-cinnabar hover:text-ink";
+}
+
 // 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({
@@ -26,6 +36,7 @@ export function ConflictCard({
   conflict,
   draft,
   missing,
+  snippet,
   onVerdict,
   onNote,
   onJump,
@@ -52,6 +63,15 @@ export function ConflictCard({
         <p className="flex-1 text-sm text-ink">{conflict.suggestion}</p>
       </div>
 
+      {snippet ? (
+        <blockquote className="mt-2 border-l-2 border-conflict/40 bg-bg/50 py-1 pl-3 text-xs leading-relaxed text-ink-soft">
+          <span className="mr-1 text-conflict" aria-hidden="true">
+            ❝
+          </span>
+          {snippet}
+        </blockquote>
+      ) : null}
+
       <div className="mt-2 flex flex-wrap items-center gap-2 pl-1 text-xs text-ink-soft">
         {conflict.where ? (
           <button
@@ -80,11 +100,10 @@ export function ConflictCard({
                 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"
-                }`}
+                className={`rounded px-3 py-1 text-xs ${verdictClass(
+                  active,
+                  opt.primary,
+                )}`}
               >
                 {opt.label}
               </button>