When COLORTERM=truecolor is set, FORCE_COLOR=1 and FORCE_COLOR=2 were both returning level 3 instead of respecting the specified level. This happened because terminal detection (checking for COLORTERM) was running after FORCE_COLOR was parsed, overriding the explicit user preference.
The fix adds an early return when FORCE_COLOR is explicitly set, preventing any terminal detection logic from overriding the user's choice. This ensures FORCE_COLOR takes priority over automatic terminal capability detection.
Fixes#624
