Explore: several values per filter, !value to leave one out, *.domain

Each explore filter takes several values, comma separated (any of them), !value to leave one out, and *.example.com for a name and the names below it. Every value is a chip with its own ✕; clicking a value in the lists adds it, and hide leaves it out. The filter bar's fields take lists. domain= still works.

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

docs/stats.md

@@ -215,9 +215,16 @@ which shows, for what you clicked:
 So "external, NXDOMAIN" leads to the clients asking, a client to everything
 it asks, one of its names to who else asks for it. The page also opens
 from **Explore the answers** at the top of the Statistics page, and has a
-filter bar to type filters in: a client, a name (or it and the names below
-it), a view, a record type, a result, blocked or not; it suggests values
-from what is shown. Filters combine (this
+filter bar to type filters in: clients, names, views, record types,
+results, blocked or not; it suggests values from what is shown.
+
+Each kind of filter takes several values, comma separated, and matches
+any of them: `10.0.0.5, 10.0.0.7` is either client. `!value` leaves one
+out (`!10.0.0.250` hides a monitoring probe), and `*.example.com` is the
+name and every name below it, so `!*.apple.com` drops a chatty device's
+noise. Kinds combine: this client, in this view, NXDOMAIN, not that name.
+In the lists, clicking a value adds it and **hide** leaves it out; every
+value has a chip with a ✕ to take it out again. Filters combine (this
 client, in this view, blocked only) and each has a ✕ to take it out. A name
 can be widened to the names below it (`domain=`). The Statistics page's
 view switches apply here too.