fix(web): stop adopting tied rectification candidates after method coverage

Coverage complete only unlocks discrimination. A 34/33/33 window plus an
occupation note must ask a D9/D10 contrast probe instead of offering a
stale winner card.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/app/api/rectification/cases/[caseId]/candidates/accept/route.ts

@@ -26,6 +26,10 @@ function errorResponse(error: unknown) {
     ["agentic_rectification_candidate_already_selected", 409, "该时间已采用"],
     ["agentic_rectification_candidate_superseded", 409, "已有更新的候选结果"],
     ["agentic_rectification_candidate_profile_changed", 409, "出生资料已变化，候选已失效"],
+    ["birth_profile_changed", 409, "出生资料已变化，候选已失效"],
+    ["scoreable_evidence_changed", 409, "可评分证据已变化，请重新比较候选"],
+    ["candidate_set_superseded", 409, "已有更新的候选结果"],
+    ["inference_revision_changed", 409, "候选后验已更新，请使用当前结果"],
     ["agentic_rectification_case_terminal", 409, "该校正已结束"],
     ["agentic_rectification_case_not_found", 404, "校正记录不存在或无权访问"],
   ] as const;