fix(scripts): Improve base URL configuration display clarity

When detecting existing configuration, the setup script now shows a
detailed breakdown instead of just "Current base URL: ...":

  Mode:    Traefik reverse proxy

  Web URL: https://app.mosaicstack.dev
  API URL: https://api.mosaicstack.dev
  Auth:    https://auth.mosaicstack.dev

This makes it clear:
- What access mode is configured (localhost/IP/domain/Traefik)
- What each URL is used for (Web UI, API, Authentication)
- Whether to change the configuration

Added helper functions:
- detect_access_mode(): Determines mode from existing .env values
- display_access_config(): Formats the URL breakdown display

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/setup.sh

@@ -686,6 +686,48 @@ recalculate_urls() {
     fi
 }
 
+# Detect access mode from existing configuration
+detect_access_mode() {
+    local base_url="$1"
+    local traefik_mode
+    traefik_mode=$(get_env_value "TRAEFIK_MODE")
+
+    if [[ "$traefik_mode" == "bundled" || "$traefik_mode" == "upstream" ]]; then
+        echo "traefik"
+    elif [[ "$base_url" == *"localhost"* ]]; then
+        echo "localhost"
+    elif [[ "$base_url" =~ ^https?://[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+ ]]; then
+        echo "ip"
+    else
+        echo "domain"
+    fi
+}
+
+# Display existing access configuration
+display_access_config() {
+    local web_url="$1"
+    local api_url="$2"
+    local auth_url="$3"
+    local mode="$4"
+
+    local mode_label
+    case "$mode" in
+        localhost) mode_label="Localhost development" ;;
+        ip)        mode_label="Local network IP" ;;
+        domain)    mode_label="Custom domain" ;;
+        traefik)   mode_label="Traefik reverse proxy" ;;
+        *)         mode_label="Custom" ;;
+    esac
+
+    echo ""
+    echo "  Mode:    $mode_label"
+    echo ""
+    echo "  Web URL: $web_url"
+    [[ -n "$api_url" ]] && echo "  API URL: $api_url"
+    [[ -n "$auth_url" ]] && echo "  Auth:    $auth_url"
+    echo ""
+}
+
 port_label() {
     local key="$1"
     case "$key" in
@@ -882,8 +924,16 @@ configure_base_url() {
     current_url=$(get_env_value "MOSAIC_BASE_URL")
 
     if [[ -n "$current_url" ]] && ! is_placeholder "$current_url"; then
-        echo "Current base URL: $current_url"
+        # Show detailed breakdown of existing configuration
-        if [[ "$NON_INTERACTIVE" == true ]] || ! confirm "Change base URL?" "n"; then
+        local current_api_url current_auth_url detected_mode
+        current_api_url=$(get_env_value "NEXT_PUBLIC_API_URL")
+        [[ -z "$current_api_url" ]] && current_api_url=$(get_env_value "API_BASE_URL")
+        current_auth_url=$(get_env_value "AUTHENTIK_PUBLIC_URL")
+        detected_mode=$(detect_access_mode "$current_url")
+
+        display_access_config "$current_url" "$current_api_url" "$current_auth_url" "$detected_mode"
+
+        if [[ "$NON_INTERACTIVE" == true ]] || ! confirm "Change access configuration?" "n"; then
             if parse_base_url "$current_url"; then
                 BASE_URL_MODE="custom"
                 if [[ -n "$BASE_URL_PORT" ]]; then