feat(migrate): Karakeep bookmarks importer

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

migrate/sources/karakeep.js

@@ -0,0 +1,22 @@
+import * as refs from '../../lib/db/repos/refs.js';
+
+const SYS = { kind: 'system', id: null };
+
+// Karakeep REST: GET /api/v1/bookmarks?cursor=... → { bookmarks:[{id,content:{url,title}}], nextCursor }.
+export async function importKarakeep({ apiUrl = process.env.KARAKEEP_URL, token = process.env.KARAKEEP_TOKEN, spaceId, dryRun = false, fetchImpl = fetch }) {
+  let cursor = null, created = 0;
+  do {
+    const u = `${apiUrl}/api/v1/bookmarks?limit=100${cursor ? `&cursor=${encodeURIComponent(cursor)}` : ''}`;
+    const res = await fetchImpl(u, { headers: { Authorization: `Bearer ${token}` } });
+    if (!res.ok) throw new Error(`karakeep ${res.status}`);
+    const body = await res.json();
+    for (const b of (body.bookmarks || [])) {
+      const url = b.content?.url; if (!url) continue;
+      created++;
+      if (dryRun) continue;
+      await refs.upsertByExternal({ space_id: spaceId, kind: 'url', source_url: url, title: b.content?.title || url, source_kind: 'karakeep', external_id: String(b.id) }, SYS);
+    }
+    cursor = body.nextCursor || null;
+  } while (cursor);
+  return { created };
+}