Merge origin/main (Tantivy content search) into delta-sync branch

Both sides added a parameter to create_application_services and a
setup step before it: this branch's storage-usage/quota service (for
the instant-upload path) and main's Tantivy content index (for
SearchService). The resolution keeps both — the signature takes both
arguments and the build runs storage usage as step 3c and the content
index as 3d.

https://claude.ai/code/session_01WdNenpnujNR2sc32XVvwfS

static/js/core/types.js

@@ -47,6 +47,8 @@
  * @property {number} sort_date
  * @property {string} etag opaque HTTP ETag, for If-Match / If-None-Match
  * @property {string} content_hash raw BLAKE3 content hash, for dedup checks
+ * @property {string} [snippet] plain-text fragment around a content match (search results only)
+ * @property {string} [match_source] "name" or "content" — how the search found this file
  */
 
 /**