initial commit on Federted servers

web/lib/pages.ts

@@ -0,0 +1,25 @@
+export const PAGES_CHANGED = 'computer:pages-changed'
+
+export const notifyPagesChanged = () => window.dispatchEvent(new Event(PAGES_CHANGED))
+
+// Notion-style breadcrumbs: the pages workspace announces which page is open
+// so the top bar can show "computer / Pages / <title>" without refetching.
+export const ACTIVE_PAGE_CHANGED = 'computer:active-page-changed'
+
+export const notifyActivePage = (title: string | null) =>
+  window.dispatchEvent(new CustomEvent<string | null>(ACTIVE_PAGE_CHANGED, { detail: title }))
+
+export type PageSummary = { id: string; title: string; pinned: boolean; position: number; _count?: { bookmarks: number } }
+
+// Pages start as "Untitled 1", "Untitled 2", ... until the user renames them.
+// Pick the lowest positive integer not already used by an untitled page.
+export function nextUntitledTitle(titles: string[]): string {
+  const used = new Set<number>()
+  for (const t of titles) {
+    const m = /^Untitled (\d+)$/.exec(t.trim())
+    if (m) used.add(parseInt(m[1], 10))
+  }
+  let n = 1
+  while (used.has(n)) n++
+  return `Untitled ${n}`
+}