* [Alts] Server-side search controls, IP counts, adjustable window
Plumbs the match-type chips through to the server: include_email/include_clientid/include_ip skip disabled identifier types in both matching and frontier expansion, so excluded types (e.g. throwaway domains) never enter the graph at any depth. Session lookback becomes adjustable (session_months, clamped 1-24, default 6). Each alt row carries ip_count, the distinct recent session IP count shown in a new IPs column. All proto additions are optional with old defaults, so old clients/servers interoperate.
* Fix remaining review threads on the alts search controls
- Disable keyboard tracking on the depth and window spin boxes so typing a
two-digit value sends one search, not one per digit.
- Reload the user under investigation on a filter change instead of reading
the search box, which could switch to a name never submitted.
- Keep a chip's last match count while it is unchecked; the server omits
unchecked match types, so the label used to drop to "(0)".
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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>