Deleting files sent every selected id in one FileNode/set. A selection
larger than the server's `maxObjectsInSet` was refused as a whole, so
nothing was deleted. The ids now go out in batches of that size; a node
already removed with its folder by an earlier batch counts as deleted,
and a refused item no longer stops the remaining batches.
`supportsSharing()` required `urn:ietf:params:jmap:principals:owner`,
which Stalwart advertises nowhere; its session only has `principals` and
`principals:availability`. The file menu therefore never showed
"Sharing & access", and `getPrincipals()` returned nothing, so the
calendar share sheet had no one to offer either.
- Gate sharing on `urn:ietf:params:jmap:principals`, like the webmail's
`supportsPrincipals()`.
- Keep `principals:owner` out of FileNode requests unless the server
advertises it, since an unknown capability in `using` fails the whole
request (why the gate had been tied to it).
- Page the principal lookup by `maxObjectsInGet`, as the webmail does:
one unbounded `Principal/query` fed every id to `Principal/get`, which
the server refuses once the directory has more than 500 entries.
`updateFileNode` and `deleteFileNodes` only looked for `notUpdated` and
`notDestroyed` in the first method response. A method-level `error`
reply (e.g. `forbidden`) has neither, so a refused rename, move or delete
reported success and the Files tab silently refreshed to the old state.
Every `FileNode/set` in `src/api/files.ts` now goes through
`requireMethodResult`, so the error reaches the existing alert in the
Files screen and the share sheet with the server's description.
The Files tab read the whole drive with `FileNode/get ids:null`, which
Stalwart silently caps at `maxObjectsInGet` (500 by default). Anything
past that, including folders created after the first 500 files and
everything inside them, never showed up, both for the own drive and for
shared accounts.
A full first page now counts as truncated, as in the webmail: the
remaining ids come from paging `FileNode/query`, are fetched in
`maxObjectsInGet`-sized `FileNode/get` batches packed into as few
requests as `maxCallsInRequest` allows, and parents that are still
unknown afterwards are fetched by id, which recovers folders on Stalwart
before 0.16.6 where the query returns files only. If the paging fails,
the first page is kept as before.