feat(rectification): 出卡加精度门槛，补经历改成系统点名

宽度超过 10 分钟或头名并列时不再出交付卡，改为按大运边界逐条问、
用类型芯片和年/月选择器录入。跳过的线换问法再问一次；答「这类事
都没有过」的不再问。用户说「没有了」仍立刻给目前范围。Skill 10.0.27。

BUG-740～743

frontend/src/lib/rectification-timeline-scale.ts

@@ -69,6 +69,8 @@ export type RectificationTimelineView = Readonly<{
    * the projection carries no count — never a zero this module invented.
    */
   answeredLabel: string | null;
+  /** `已对照 N 件`. Null when the projection carries no dated-event count. */
+  datedEventLabel: string | null;
 }>;
 
 /** `HH:MM` or `HH:MM:SS` to minutes past midnight; null when unparseable. */
@@ -181,6 +183,8 @@ export type RectificationTimelineInput = Readonly<{
   workingAdopted?: boolean;
   /** `inference_state.answered_probe_count`; absent when not projected. */
   answeredProbeCount?: number | null;
+  /** Dated confirmed events already on the ledger. */
+  datedEventCount?: number | null;
 }>;
 
 /**
@@ -252,6 +256,7 @@ export function buildRectificationTimeline(
     widthLabel: timelineDurationLabel(bandEnd - bandStart + 1),
     workingLabel: workingMinuteLabel(input.workingTime, input.workingAdopted === true),
     answeredLabel: answeredProbeLabel(input.answeredProbeCount),
+    datedEventLabel: datedEventLabel(input.datedEventCount),
   };
 }
 
@@ -278,3 +283,8 @@ export function answeredProbeLabel(count: number | null | undefined): string | n
   if (typeof count !== "number" || !Number.isInteger(count) || count <= 0) return null;
   return `已答 ${count} 题`;
 }
+
+export function datedEventLabel(count: number | null | undefined): string | null {
+  if (typeof count !== "number" || !Number.isInteger(count) || count <= 0) return null;
+  return `已对照 ${count} 件`;
+}