fix(clients): include Telegram ID in client list search (#5888)
* fix(clients): include Telegram ID in client list search
clientMatchesSearch only checked Email/SubID/Comment/UUID/Password/Auth,
so searching the client list for a Telegram user ID never matched even
though the field is stored on every client.
This is a real regression, not a field that was simply never included:
before the paged search endpoint (#4500), the frontend searched with
ObjectUtil.deepSearch() over the full client object, which recursed into
every field including tgId. Replacing that with a fixed backend field
list silently dropped it (along with a few other fields, but tgId is the
one that's actually needed here since it's the panel's own way of
looking a client up when it only knows their Telegram ID).
TgID is int64 (0 = unset), so it can't sit in the existing []string
candidates array — matched separately via strconv, and skipped when 0 to
avoid a needle of "0" spuriously matching every client without a
Telegram ID.
Fixes #5880
* fix(clients): drop explanatory comment, mention Telegram ID in search hint
Addresses review feedback on #5888:
- Removed the // comment block above the TgID check in
clientMatchesSearch per repo convention (code should read on its own).
- Updated searchPlaceholder in all 13 locale files to mention Telegram ID,
since the search box now actually matches on it.
* test(clients): remove TgID search test per maintainer request