fix: source ~/.env with set -a so variables are exported to child processes

Variables set in ~/.env without explicit export were shell-local only —
child processes (scripts, subshells) never inherited them. Source it in
a dedicated section with set -a/set +a to auto-export everything.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.zshrc

@@ -83,13 +83,25 @@ for expr in "${eval_expressions[@]}"; do
 done
 
 
+# =============================================================================
+# ENVIRONMENT VARIABLES
+# =============================================================================
+
+# Source ~/.env with set -a so every variable is automatically exported
+# and inherited by child processes (scripts, subshells, etc.).
+if [[ -f "$HOME/.env" && -r "$HOME/.env" ]]; then
+  set -a
+  source "$HOME/.env"
+  set +a
+fi
+
+
 # =============================================================================
 # CONFIGURATION FILES TO SOURCE
 # =============================================================================
 
 # Define files to source in an array for easy management
 source_files=(
-  "$HOME/.env"
   "$HOME/.nvm/nvm.sh"
   "$HOME/.cargo/env"
   "$HOME/.oh-my-zsh/oh-my-zsh.sh"