feat(memory-v2): close Phase A with auto-review, product events, and H5 recall UI.

Add candidate auto-review pipeline, shadow audit tooling, admin metrics page,
and user-visible memory recall hints in chat with phase-a readiness checks.

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

src/utils/memoryFeedback.ts

@@ -0,0 +1,56 @@
+import type { UserMemoryRecallHintResponse, UserMemorySyncResponse } from '../types';
+
+export type { MemoryRecallBadge } from '../types';
+
+export function formatPersonalMemorySavedNotice(
+  result: Pick<UserMemorySyncResponse, 'personalMemory'>,
+): string | null {
+  const preview = result.personalMemory?.savedPreviews?.[0]?.preview;
+  if (!preview) return null;
+  return `已记住：${preview}${preview.length >= 60 ? '…' : ''}`;
+}
+
+export function formatMemoryRecallNotice(count: number): string | null {
+  if (!Number.isFinite(count) || count <= 0) return null;
+  return `参考了你的 ${count} 条记忆`;
+}
+
+export function formatMemoryHintNotice(hint: UserMemoryRecallHintResponse): string | null {
+  if (hint.injectionEnabled && hint.memoryCount > 0) {
+    return formatMemoryRecallNotice(hint.memoryCount);
+  }
+  if (hint.savedPreview) {
+    const preview = hint.savedPreview;
+    return `已记住：${preview}${preview.length >= 60 ? '…' : ''}`;
+  }
+  return null;
+}
+
+export function formatUserMemorySyncNotice(result: UserMemorySyncResponse): string {
+  const savedNotice = formatPersonalMemorySavedNotice(result);
+  if (savedNotice) return savedNotice;
+  if (result.memories > 0) {
+    return `新增 ${result.memories} 条长期记忆，当前累计 ${result.totalMemories} 条`;
+  }
+  if (result.analyzed > 0) {
+    return `已分析最近对话，暂无新的长期记忆，当前累计 ${result.totalMemories} 条`;
+  }
+  return `没有新的用户对话可提炼，当前累计 ${result.totalMemories} 条`;
+}
+
+export function buildMemoryRecallBadge(
+  hint: UserMemoryRecallHintResponse,
+): { count: number; previews: string[] } | null {
+  if (!hint.injectionEnabled || hint.memoryCount <= 0) return null;
+  return {
+    count: hint.memoryCount,
+    previews: hint.memoryPreviews ?? [],
+  };
+}
+
+export function resolveMessageRecallKey(
+  message: { id?: string | null; role: string; created: number },
+  index: number,
+): string {
+  return message.id ?? `msg-${index}-${message.role}-${message.created}`;
+}