Fix optimize compatibility at some times

lib/clean/user.sh

@@ -213,8 +213,11 @@ clean_application_support_logs() {
         app_name=$(basename "$app_dir")
 
         # Skip system and protected apps
-        case "$app_name" in
-            com.apple.* | Adobe* | JetBrains* | 1Password | Claude | *ClashX* | *clash* | mihomo* | *Surge* | iTerm* | *iterm* | Warp* | Kitty* | Alacritty* | WezTerm* | Ghostty*)
+        # Convert to lowercase for case-insensitive matching
+        local app_name_lower
+        app_name_lower=$(echo "$app_name" | tr '[:upper:]' '[:lower:]')
+        case "$app_name_lower" in
+            com.apple.* | adobe* | jetbrains* | 1password | claude | *clashx* | *clash* | mihomo* | *surge* | iterm* | warp* | kitty* | alacritty* | wezterm* | ghostty*)
                 continue
                 ;;
         esac

lib/core/common.sh

@@ -98,13 +98,17 @@ readonly STAT_BSD="/usr/bin/stat"
 # Get file size in bytes using BSD stat
 get_file_size() {
     local file="$1"
-    $STAT_BSD -f%z "$file" 2> /dev/null || echo 0
+    local result
+    result=$($STAT_BSD -f%z "$file" 2> /dev/null)
+    echo "${result:-0}"
 }
 
 # Get file modification time (epoch seconds) using BSD stat
 get_file_mtime() {
     local file="$1"
-    $STAT_BSD -f%m "$file" 2> /dev/null || echo 0
+    local result
+    result=$($STAT_BSD -f%m "$file" 2> /dev/null)
+    echo "${result:-0}"
 }
 
 # Get file owner username using BSD stat
@@ -1145,7 +1149,9 @@ clean_tool_cache() {
 # Returns: size in KB, or 0 if path doesn't exist or error occurs
 get_path_size_kb() {
     local path="$1"
-    du -sk "$path" 2> /dev/null | awk '{print $1}' || echo "0"
+    local result
+    result=$(du -sk "$path" 2> /dev/null | awk '{print $1}')
+    echo "${result:-0}"
 }
 
 bytes_to_human_kb() { bytes_to_human "$((${1:-0} * 1024))"; }