fix(任务): 修复快速创建导致的重复ID

apps/web/lib/entity-id.test.ts

@@ -0,0 +1,27 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+
+import { createEntityId, dedupeEntityIds } from './entity-id';
+
+test('createEntityId stays unique within the same millisecond', () => {
+  const ids = Array.from({ length: 20 }, () => createEntityId('task', 1782361373857));
+
+  assert.equal(new Set(ids).size, ids.length);
+});
+
+test('dedupeEntityIds rewrites duplicate ids while preserving the first item id', () => {
+  const result = dedupeEntityIds(
+    [
+      { id: 'task-1', title: 'A' },
+      { id: 'task-1', title: 'B' },
+      { id: 'task-2', title: 'C' },
+      { id: 'task-1', title: 'D' },
+    ],
+    'task',
+    1782361373857,
+  );
+
+  assert.equal(result.changed, true);
+  assert.equal(result.items[0].id, 'task-1');
+  assert.equal(new Set(result.items.map((item) => item.id)).size, result.items.length);
+});

apps/web/lib/entity-id.ts

@@ -0,0 +1,43 @@
+let lastTimestamp = 0;
+let sameTimestampSequence = 0;
+
+export interface DedupeEntityIdsResult<T> {
+  items: T[];
+  changed: boolean;
+}
+
+export function createEntityId(prefix: string, timestamp = Date.now()): string {
+  if (timestamp === lastTimestamp) {
+    sameTimestampSequence += 1;
+  } else {
+    lastTimestamp = timestamp;
+    sameTimestampSequence = 0;
+  }
+  return `${prefix}-${timestamp}-${sameTimestampSequence.toString(36)}`;
+}
+
+export function dedupeEntityIds<T extends { id: string }>(
+  items: T[],
+  prefix: string,
+  timestamp = Date.now(),
+): DedupeEntityIdsResult<T> {
+  const seen = new Set<string>();
+  let changed = false;
+
+  const deduped = items.map((item) => {
+    if (item.id && !seen.has(item.id)) {
+      seen.add(item.id);
+      return item;
+    }
+
+    changed = true;
+    let nextId = createEntityId(prefix, timestamp);
+    while (seen.has(nextId)) {
+      nextId = createEntityId(prefix, timestamp);
+    }
+    seen.add(nextId);
+    return { ...item, id: nextId };
+  });
+
+  return { items: changed ? deduped : items, changed };
+}