Fix: Improve Homebrew uninstallation feedback in 'mo remove'

When 'mole remove' is used and Mole was installed via Homebrew, the script
now provides more explicit feedback if the 'brew uninstall --force mole'
command fails. Previously, errors were silently ignored.

This change ensures that if Homebrew uninstallation encounters an issue,
the user is informed with the error output and instructed on how to
manually complete the uninstallation, preventing inconsistencies where
Homebrew still believes Mole is installed.

Additionally, a minor improvement to config_dir resolution in update_mole
was included for robustness.

mole

@@ -432,11 +432,15 @@ update_mole() {
     # Run installer with visible output (but capture for error handling)
     local install_output
     local update_tag="V${latest#V}"
-    if install_output=$(MOLE_VERSION="$update_tag" "$tmp_installer" --prefix "$install_dir" --config "$HOME/.config/mole" --update 2>&1); then
+    local config_dir="${MOLE_CONFIG_DIR:-$SCRIPT_DIR}"
+    if [[ ! -f "$config_dir/lib/core/common.sh" ]]; then
+        config_dir="$HOME/.config/mole"
+    fi
+    if install_output=$(MOLE_VERSION="$update_tag" "$tmp_installer" --prefix "$install_dir" --config "$config_dir" --update 2>&1); then
         process_install_output "$install_output"
     else
         # Retry without --update flag
-        if install_output=$(MOLE_VERSION="$update_tag" "$tmp_installer" --prefix "$install_dir" --config "$HOME/.config/mole" 2>&1); then
+        if install_output=$(MOLE_VERSION="$update_tag" "$tmp_installer" --prefix "$install_dir" --config "$config_dir" 2>&1); then
             process_install_output "$install_output"
         else
             if [[ -t 1 ]]; then stop_inline_spinner; fi
@@ -461,11 +465,27 @@ remove_mole() {
     fi
 
     local is_homebrew=false
+    local brew_cmd=""
+    local brew_has_mole="false"
     local -a manual_installs=()
     local -a alias_installs=()
 
+    if command -v brew > /dev/null 2>&1; then
+        brew_cmd="brew"
+    elif [[ -x "/opt/homebrew/bin/brew" ]]; then
+        brew_cmd="/opt/homebrew/bin/brew"
+    elif [[ -x "/usr/local/bin/brew" ]]; then
+        brew_cmd="/usr/local/bin/brew"
+    fi
+
+    if [[ -n "$brew_cmd" ]]; then
+        if "$brew_cmd" list --formula 2> /dev/null | grep -q "^mole$"; then
+            brew_has_mole="true"
+        fi
+    fi
+
     # Check Homebrew
-    if is_homebrew_install; then
+    if [[ "$brew_has_mole" == "true" ]] || is_homebrew_install; then
         is_homebrew=true
     fi
 
@@ -557,11 +577,25 @@ remove_mole() {
             ;;
     esac
 
-    # Remove Homebrew installation (silent)
+    # Remove Homebrew installation
     local has_error=false
     if [[ "$is_homebrew" == "true" ]]; then
-        if ! brew uninstall --force mole > /dev/null 2>&1; then
+        if [[ -z "$brew_cmd" ]]; then
+            log_error "Homebrew command not found. Please ensure Homebrew is installed and in your PATH."
+            log_warning "You may need to manually run: brew uninstall --force mole"
+            exit 1
+        fi
+
+        log_admin "Attempting to uninstall Mole via Homebrew..."
+        local brew_uninstall_output
+        if ! brew_uninstall_output=$("$brew_cmd" uninstall --force mole 2>&1); then
             has_error=true
+            log_error "Homebrew uninstallation failed:"
+            printf "%s\n" "$brew_uninstall_output" | sed "s/^/${RED}  | ${NC}/" >&2
+            log_warning "Please manually run: ${YELLOW}brew uninstall --force mole${NC}"
+            echo "" # Add a blank line for readability
+        else
+            log_success "Mole uninstalled via Homebrew."
         fi
     fi
     # Remove manual installations