Process listing no longer hangs and runs with a clean environment

Claude Code sometimes runs the system's ps command to list running programs and look up a program's name. These calls changed in three ways:

• ps now runs with a cleaned-up set of environment variables (the background settings a program inherits), a time limit, and a forced stop if it runs past that limit.
• The program-name lookup now gets its own environment set to LC_ALL=C (plain, language-neutral output) and TZ=UTC (a fixed time zone), and it no longer inherits the rest of your environment.
• If a ps call is stopped partway, Claude Code keeps only the complete lines of output it received and drops the cut-off last line.

Before, these calls used a fixed block of environment values and ps had no time limit.