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src/lib/projectRegistry.ts

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+import { DEFAULT_PROJECT_ID, QUICK_PROJECT_ID, normalizeProjectId } from '@/lib/workspace'
+import { i18n } from '@/i18n'
+
+const PROJECT_REGISTRY_KEY = 'jgjs-project-registry-v1'
+
+export interface ProjectMeta {
+  id: string
+  name: string
+  createdAt: string
+  updatedAt: string
+  lastOpenedAt: string
+}
+
+type ProjectRegistryPayload = {
+  projects: ProjectMeta[]
+}
+
+const nowIso = () => new Date().toISOString()
+const lastEditedTouchAt = new Map<string, number>()
+
+const defaultProjects = (): ProjectMeta[] => {
+  return []
+}
+
+const sanitizeProject = (item: Partial<ProjectMeta> | null | undefined): ProjectMeta | null => {
+  if (!item || typeof item !== 'object') return null
+  const id = normalizeProjectId(item.id)
+  const name = String(item.name || '').trim() || (
+    id === QUICK_PROJECT_ID
+      ? i18n.global.t('quickCalc.projectName')
+      : i18n.global.t('tab.messages.projectNamePrefix', { id })
+  )
+  const createdAt = typeof item.createdAt === 'string' && item.createdAt ? item.createdAt : nowIso()
+  const updatedAt = typeof item.updatedAt === 'string' && item.updatedAt ? item.updatedAt : createdAt
+  const lastOpenedAt =
+    typeof item.lastOpenedAt === 'string' && item.lastOpenedAt ? item.lastOpenedAt : updatedAt
+  return { id, name, createdAt, updatedAt, lastOpenedAt }
+}
+
+const readPayload = (): ProjectRegistryPayload => {
+  try {
+    const raw = localStorage.getItem(PROJECT_REGISTRY_KEY)
+    if (!raw) return { projects: defaultProjects() }
+    const parsed = JSON.parse(raw) as Partial<ProjectRegistryPayload>
+    const projects = Array.isArray(parsed?.projects)
+      ? parsed.projects.map(item => sanitizeProject(item)).filter((item): item is ProjectMeta => Boolean(item))
+      : []
+    if (projects.length === 0) return { projects: defaultProjects() }
+    return { projects }
+  } catch {
+    return { projects: defaultProjects() }
+  }
+}
+
+const writePayload = (payload: ProjectRegistryPayload) => {
+  localStorage.setItem(PROJECT_REGISTRY_KEY, JSON.stringify(payload))
+}
+
+export const listProjects = () => {
+  const payload = readPayload()
+  return payload.projects
+    .filter(item => item.id !== QUICK_PROJECT_ID && item.id !== DEFAULT_PROJECT_ID)
+    .slice()
+    .sort((a, b) => new Date(b.lastOpenedAt).getTime() - new Date(a.lastOpenedAt).getTime())
+}
+
+export const upsertProject = (
+  projectIdRaw: string,
+  nameRaw?: string,
+  options?: {
+    touchUpdatedAt?: boolean
+    touchLastOpenedAt?: boolean
+  }
+) => {
+  const id = normalizeProjectId(projectIdRaw)
+  if (id === QUICK_PROJECT_ID || id === DEFAULT_PROJECT_ID) return
+  const name = String(nameRaw || '').trim()
+  const payload = readPayload()
+  const now = nowIso()
+  const touchUpdatedAt = options?.touchUpdatedAt === true
+  const touchLastOpenedAt = options?.touchLastOpenedAt !== false
+  const index = payload.projects.findIndex(item => item.id === id)
+  if (index < 0) {
+    payload.projects.push({
+      id,
+      name: name || (
+        id === QUICK_PROJECT_ID
+          ? i18n.global.t('quickCalc.projectName')
+          : i18n.global.t('tab.messages.projectNamePrefix', { id })
+      ),
+      createdAt: now,
+      updatedAt: now,
+      lastOpenedAt: now
+    })
+  } else {
+    const current = payload.projects[index]
+    payload.projects[index] = {
+      ...current,
+      name: name || current.name,
+      updatedAt: touchUpdatedAt ? now : current.updatedAt,
+      lastOpenedAt: touchLastOpenedAt ? now : current.lastOpenedAt
+    }
+  }
+  writePayload(payload)
+}
+
+export const touchProjectEdited = (
+  projectIdRaw: string,
+  options?: {
+    throttleMs?: number
+  }
+) => {
+  const id = normalizeProjectId(projectIdRaw)
+  if (id === QUICK_PROJECT_ID || id === DEFAULT_PROJECT_ID) return false
+  const throttleMs = Math.max(0, Number(options?.throttleMs ?? 5000))
+  const nowMs = Date.now()
+  const lastTouch = lastEditedTouchAt.get(id) ?? 0
+  if (throttleMs > 0 && nowMs - lastTouch < throttleMs) return false
+
+  const payload = readPayload()
+  const index = payload.projects.findIndex(item => item.id === id)
+  if (index < 0) return false
+  const now = nowIso()
+  const current = payload.projects[index]
+  payload.projects[index] = {
+    ...current,
+    updatedAt: now,
+    lastOpenedAt: now
+  }
+  writePayload(payload)
+  lastEditedTouchAt.set(id, nowMs)
+  return true
+}
+
+export const createProject = (nameRaw?: string) => {
+  const payload = readPayload()
+  const now = nowIso()
+  let id = ''
+  do {
+    id = normalizeProjectId(`p-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 6)}`)
+  } while (payload.projects.some(item => item.id === id))
+  const name = String(nameRaw || '').trim() || i18n.global.t('tab.messages.projectNamePrefix', { id: payload.projects.length + 1 })
+  const project: ProjectMeta = { id, name, createdAt: now, updatedAt: now, lastOpenedAt: now }
+  payload.projects.push(project)
+  writePayload(payload)
+  return project
+}
+
+export const deleteProject = (projectIdRaw: string) => {
+  const id = normalizeProjectId(projectIdRaw)
+  if (id === QUICK_PROJECT_ID || id === DEFAULT_PROJECT_ID) return false
+  const payload = readPayload()
+  const nextProjects = payload.projects.filter(item => item.id !== id)
+  if (nextProjects.length === payload.projects.length) return false
+  payload.projects = nextProjects
+  writePayload(payload)
+  return true
+}