static term_cnt not reset across server connections

[jeonghanlee]

Summary

static int term_cnt in con_core persists across sequential server connections, so a new client's hex line-wrap counter can start mid-line if the previous client disconnected mid-line. Server + hexa only; cosmetic.

Location

con.cpp:246.

Acceptance

• Reset term_cnt per connection (or make it non-static, scoped per con_core call).

Verification

• T1 — two sequential server clients each start hex output on a fresh line
• hexa suite green

Backlog (deferred). Register: docs/milestone.md. Tests land in the release cycle that schedules this.