Add clickable keep-prompt snippets for video and image.

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

utils/keepPrompts.ts

@@ -0,0 +1,85 @@
+export type KeepPromptKind = 'video' | 'image'
+
+export type KeepPrompt = {
+  id: string
+  label: string
+  text: string
+}
+
+export type KeepPromptLists = {
+  video: KeepPrompt[]
+  image: KeepPrompt[]
+}
+
+export const KEEP_PROMPT_MAX = 40
+export const KEEP_PROMPT_TEXT_MAX = 500
+export const KEEP_PROMPT_LABEL_MAX = 40
+
+export function emptyKeepPrompts(): KeepPromptLists {
+  return { video: [], image: [] }
+}
+
+export function sanitizeKeepPromptText(raw: unknown) {
+  return String(raw || '')
+    .replace(/\r\n/g, '\n')
+    .replace(/[\0\r]/g, '')
+    .trim()
+    .slice(0, KEEP_PROMPT_TEXT_MAX)
+}
+
+export function sanitizeKeepPromptLabel(raw: unknown, fallback = '') {
+  const label = String(raw || '').replace(/\s+/g, ' ').trim().slice(0, KEEP_PROMPT_LABEL_MAX)
+  if (label) return label
+  const fromText = sanitizeKeepPromptText(fallback).replace(/\s+/g, ' ').slice(0, KEEP_PROMPT_LABEL_MAX)
+  return fromText
+}
+
+function normalizeItem(raw: unknown): KeepPrompt | null {
+  if (!raw || typeof raw !== 'object') return null
+  const rec = raw as Record<string, unknown>
+  const text = sanitizeKeepPromptText(rec.text)
+  if (!text) return null
+  const id = String(rec.id || '').trim() || crypto.randomUUID()
+  return {
+    id,
+    label: sanitizeKeepPromptLabel(rec.label, text),
+    text
+  }
+}
+
+export function normalizeKeepPromptList(raw: unknown): KeepPrompt[] {
+  if (!Array.isArray(raw)) return []
+  const seen = new Set<string>()
+  const out: KeepPrompt[] = []
+  for (const entry of raw) {
+    if (out.length >= KEEP_PROMPT_MAX) break
+    const item = normalizeItem(entry)
+    if (!item || seen.has(item.id)) continue
+    seen.add(item.id)
+    out.push(item)
+  }
+  return out
+}
+
+export function normalizeKeepPrompts(raw: unknown): KeepPromptLists {
+  if (!raw || typeof raw !== 'object' || Array.isArray(raw)) return emptyKeepPrompts()
+  const rec = raw as Record<string, unknown>
+  return {
+    video: normalizeKeepPromptList(rec.video),
+    image: normalizeKeepPromptList(rec.image)
+  }
+}
+
+export function parseKeepPromptKind(raw: unknown): KeepPromptKind | '' {
+  return raw === 'video' || raw === 'image' ? raw : ''
+}
+
+export function insertKeepSnippet(text: string, snippet: string) {
+  const src = String(text || '')
+  const token = sanitizeKeepPromptText(snippet)
+  if (!token) return src
+  if (src.includes(token)) return src
+  if (!src.trim()) return token
+  const needsBreak = !/\n$/.test(src)
+  return needsBreak ? `${src.trimEnd()}\n${token}` : `${src}${token}`
+}