feat: add default icons and colors fallback in logging module

lib/core/log.ps1

@@ -12,6 +12,46 @@ $script:MOLE_LOG_LOADED = $true
 $scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
 . "$scriptDir\base.ps1"
 
+# Fallbacks in case base.ps1 did not initialize icons/colors in this scope
+if (-not ($script:Icons -is [hashtable])) {
+    $script:Icons = @{}
+}
+
+$iconDefaults = @{
+    List    = "*"
+    Success = "+"
+    Warning = "!"
+    Error   = "x"
+    DryRun  = ">"
+    Arrow   = ">"
+}
+
+foreach ($key in $iconDefaults.Keys) {
+    if (-not $script:Icons.ContainsKey($key)) {
+        $script:Icons[$key] = $iconDefaults[$key]
+    }
+}
+
+if (-not ($script:Colors -is [hashtable])) {
+    $script:Colors = @{}
+}
+
+$colorDefaults = @{
+    Cyan       = ""
+    Green      = ""
+    Yellow     = ""
+    Red        = ""
+    Gray       = ""
+    PurpleBold = ""
+    NC         = ""
+}
+
+foreach ($key in $colorDefaults.Keys) {
+    if (-not $script:Colors.ContainsKey($key)) {
+        $script:Colors[$key] = $colorDefaults[$key]
+    }
+}
+
 # ============================================================================
 # Log Configuration
 # ============================================================================