完善韩泰 EOT 标注编辑器并更新标注规范与项目资料

labels/eot-studio/lib/call-reference.ts

@@ -1,13 +0,0 @@
-/** Read-only source-table evidence, separate from timed transcripts and EOT labels. */
-export interface CallReference {
-  call_id: string;
-  source: {
-    file: string;
-    sheet: string;
-    row: number;
-  };
-  fields: {
-    label: string;
-    value: string;
-  }[];
-}

labels/eot-studio/lib/edit-history.ts

@@ -0,0 +1,21 @@
+export interface EditHistory<T> { past: T[]; present: T; future: T[] }
+const LIMIT = 40;
+
+export function createEditHistory<T>(present: T): EditHistory<T> {
+  return { past: [], present, future: [] };
+}
+
+export function commitEdit<T>(history: EditHistory<T>, present: T): EditHistory<T> {
+  if (present === history.present) return history;
+  return { past: [...history.past, history.present].slice(-LIMIT), present, future: [] };
+}
+
+export function undoEdit<T>(history: EditHistory<T>): EditHistory<T> {
+  if (!history.past.length) return history;
+  return { past: history.past.slice(0, -1), present: history.past.at(-1)!, future: [history.present, ...history.future] };
+}
+
+export function redoEdit<T>(history: EditHistory<T>): EditHistory<T> {
+  if (!history.future.length) return history;
+  return { past: [...history.past, history.present].slice(-LIMIT), present: history.future[0], future: history.future.slice(1) };
+}

labels/eot-studio/lib/timeline-edit.ts

@@ -0,0 +1,25 @@
+export interface SnapPoint { ms: number; label: string }
+
+/** Keep magnetic selection consistent with zoom without attracting distant audio. */
+export function snapTimelineTime(ms: number, points: SnapPoint[], duration: number, width: number, bypass = false) {
+  const bounded = Math.round(Math.max(0, Math.min(duration, ms)));
+  const radius = Math.min(500, duration / Math.max(1, width) * 8);
+  let point: SnapPoint | null = null;
+  let distance = radius;
+  if (!bypass) {
+    for (const candidate of points) {
+      if (candidate.ms < 0 || candidate.ms > duration) continue;
+      const delta = Math.abs(candidate.ms - bounded);
+      if (delta <= distance && (!point || delta < distance)) { point = candidate; distance = delta; }
+    }
+  }
+  return { ms: point?.ms ?? bounded, point };
+}
+
+/** A resized segment must stay in the recording and retain a positive duration. */
+export function resizeTranscriptRange(start: number, end: number, edge: "start" | "end", ms: number, duration: number) {
+  const value = Math.round(ms);
+  return edge === "start"
+    ? { start_ms: Math.max(0, Math.min(end - 1, value)), end_ms: end }
+    : { start_ms: start, end_ms: Math.max(start + 1, Math.min(duration, value)) };
+}