Cloned miniPC images share the same MachineGuid, so their client_id
collides and only one host appears in the list. Fold the hostname into
the V2 client-ID hash so hosts with distinct names no longer collide.
Already-persisted client IDs are unchanged: they recompute only after
the settings/client_id registry value is cleared.
Server side, when a login reuses an existing client_id but the hostname,
IP, or username differs, emit a WARN diagnostic before assigning the
connection to the standby list. Observation-only, no behavior change.
Co-Authored-By: deepseek-v4-pro
Geographic location (city, country) from the geo APIs is UTF-8, but the client
and several server paths converted or stored it in the system ANSI code page,
turning umlauts ("ö"/"ä") into "?" or GBK mojibake ("B枚blingen"). Keep the
value UTF-8 end to end: the client caches it as UTF-8 and re-queries once after
an upgrade (keyed by __DATE__, the app's version convention), while the server
stores and displays it as UTF-8 in the online list, the activity log, the
client-info export, JSON/email payloads and search.
Also add a confirmation prompt before opening a remote chat from the toolbar,
with German, English and Traditional-Chinese translations.
Co-Authored-By: deepseek-v4-pro
