refactor: math::calculate

Modified math calculations to prioritize shell arithmetic for integers, falling back to awk only when decimals are needed

Author: Chemaclass

src/math.sh

@@ -3,9 +3,11 @@
 function math::calculate() {
   if dependencies::has_bc; then
     echo "$*" | bc
-  elif dependencies::has_awk; then
+  elif [[ "$*" == *.* ]] && dependencies::has_awk; then
+    # Use awk for floating point calculations when bc is unavailable
     awk "BEGIN { print ($*) }"
   else
+    # Fallback to shell arithmetic which has good integer precision
     local result=$(( $* ))
     echo "$result"
   fi