The Directory comes from the directory service (#205)

ipx asks ipx-directory on its people's behalf, with the token an admin set
in the new Admin, Directory tab, so the page never talks to it and never
sees the token or a feed's address. /api/directory, /api/popular and a
feed's Directory page answer from it; subscribing takes the address from
the directory and goes through Add feed's steps. With no directory set
up, the Directory says so. The local directory code is gone; its privacy
checks are the snapshot builder's now, and their tests moved with them.

With sharing on, ipx sends its snapshot after every scan, whenever the
config changes (set_cfg) and every half hour: each public feed and how
many here subscribe, never an OPML or Patreon creator itself or anything
private. A feed can be marked private in its settings, for a paid feed
whose address does not give it away; anyone subscribed may mark it, only
an admin unmark it. The admin's category for a feed that names none goes
with it, which the directory uses only while the feed names none, so the
category an admin gives a blog still reaches the Directory.

The directory lists only feeds it has read as a feed: the first snapshot
after a start went before the first scan, when an OPML was not yet known
to be one, and the directory listed the OPML. It now fetches what a
snapshot brings in at once instead of within the minute.

The browser suite runs its own ipx-directory on SQLite; the Directory's
tests match feeds by title, since the directory names them by address.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -13,6 +13,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- The Directory shows a directory service that iPX servers share, set up in Admin, Directory with its address and this server's token, instead of only this server's feeds. Sharing this server's public feeds with it is a switch there, and subscriber counts are every sharing server's (#205).
+- A feed's settings have a Private switch: a private feed is never shared with the directory. A feed with a login, or whose address carries a key, is private already (#205).
 - Add a feed no longer asks for a folder; a feed's folder is its title (#201).
 - `docker-compose.yml` is a sample to start from, ipx alone on SQLite with its folders beside the file, instead of a copy of the author's server (#208).
 - The source is a Cargo workspace: the daemon in `crates/ipx`, feed fetching and parsing in `crates/feed`. `cargo build --release` still makes `target/release/ipx` (#202).