Enhanced optimization for better use

bin/uninstall.sh

@@ -222,14 +222,24 @@ scan_applications() {
             app_size=$(bytes_to_human "$((app_size_kb * 1024))")
         fi
 
-        # Get last used date - simplified for speed
-        # Note: mdls can be slow (40ms+ per app), so we use file mtime instead
+        # Get last used date
         local last_used="Never"
         local last_used_epoch=0
 
         if [[ -d "$app_path" ]]; then
-            # Use file modification time (much faster than mdls)
-            last_used_epoch=$(get_file_mtime "$app_path")
+            # Try mdls first with short timeout (0.05s) for accuracy, fallback to mtime for speed
+            local metadata_date
+            metadata_date=$(run_with_timeout 0.05 mdls -name kMDItemLastUsedDate -raw "$app_path" 2> /dev/null || echo "")
+
+            if [[ "$metadata_date" != "(null)" && -n "$metadata_date" ]]; then
+                last_used_epoch=$(date -j -f "%Y-%m-%d %H:%M:%S %z" "$metadata_date" "+%s" 2> /dev/null || echo "0")
+            fi
+
+            # Fallback if mdls failed or returned nothing
+            if [[ "$last_used_epoch" -eq 0 ]]; then
+                last_used_epoch=$(get_file_mtime "$app_path")
+            fi
+
             if [[ $last_used_epoch -gt 0 ]]; then
                 local days_ago=$(((current_epoch - last_used_epoch) / 86400))
 
@@ -282,7 +292,6 @@ scan_applications() {
         done
     ) &
     spinner_pid=$!
-    disown 2> /dev/null || true
 
     # Process apps in parallel batches
     for app_data_tuple in "${app_data_tuples[@]}"; do

lib/check/health_json.sh

@@ -84,6 +84,12 @@ get_uptime_days() {
     echo "$uptime_days"
 }
 
+# JSON escape helper
+json_escape() {
+    # Escape backslash, double quote, tab, and newline
+    echo -n "$1" | sed 's/\\/\\\\/g; s/"/\\"/g; s/	/\\t/g' | tr '\n' ' '
+}
+
 # Generate JSON output
 generate_health_json() {
     # System info
@@ -127,6 +133,11 @@ EOF
     for item in "${items[@]}"; do
         IFS='|' read -r action name desc safe <<< "$item"
 
+        # Escape strings
+        action=$(json_escape "$action")
+        name=$(json_escape "$name")
+        desc=$(json_escape "$desc")
+
         [[ "$first" == "true" ]] && first=false || echo ","
 
         cat << EOF

lib/core/app_protection.sh

@@ -420,7 +420,7 @@ find_app_files() {
     [[ -f ~/Library/Preferences/"$bundle_id".plist ]] && files_to_clean+=("$HOME/Library/Preferences/$bundle_id.plist")
     [[ -d ~/Library/Preferences/ByHost ]] && while IFS= read -r -d '' pref; do
         files_to_clean+=("$pref")
-    done < <(find ~/Library/Preferences/ByHost \( -name \"$bundle_id*.plist\" \) -print0 2> /dev/null)
+    done < <(find ~/Library/Preferences/ByHost \( -name "$bundle_id*.plist" \) -print0 2> /dev/null)
 
     # Logs
     [[ -d ~/Library/Logs/"$app_name" ]] && files_to_clean+=("$HOME/Library/Logs/$app_name")
@@ -435,7 +435,7 @@ find_app_files() {
     # Group Containers
     [[ -d ~/Library/Group\ Containers ]] && while IFS= read -r -d '' container; do
         files_to_clean+=("$container")
-    done < <(find ~/Library/Group\ Containers -type d \( -name \"*$bundle_id*\" \) -print0 2> /dev/null)
+    done < <(find ~/Library/Group\ Containers -type d \( -name "*$bundle_id*" \) -print0 2> /dev/null)
 
     # WebKit data
     [[ -d ~/Library/WebKit/"$bundle_id" ]] && files_to_clean+=("$HOME/Library/WebKit/$bundle_id")
@@ -514,7 +514,7 @@ find_app_system_files() {
     # Privileged Helper Tools
     [[ -d /Library/PrivilegedHelperTools ]] && while IFS= read -r -d '' helper; do
         system_files+=("$helper")
-    done < <(find /Library/PrivilegedHelperTools \( -name \"$bundle_id*\" \) -print0 2> /dev/null)
+    done < <(find /Library/PrivilegedHelperTools \( -name "$bundle_id*" \) -print0 2> /dev/null)
 
     # System Preferences
     [[ -f /Library/Preferences/"$bundle_id".plist ]] && system_files+=("/Library/Preferences/$bundle_id.plist")
@@ -522,7 +522,7 @@ find_app_system_files() {
     # Installation Receipts
     [[ -d /private/var/db/receipts ]] && while IFS= read -r -d '' receipt; do
         system_files+=("$receipt")
-    done < <(find /private/var/db/receipts \( -name \"*$bundle_id*\" \) -print0 2> /dev/null)
+    done < <(find /private/var/db/receipts \( -name "*$bundle_id*" \) -print0 2> /dev/null)
 
     # System Logs
     [[ -d /Library/Logs/"$app_name" ]] && system_files+=("/Library/Logs/$app_name")

lib/core/timeout.sh

@@ -81,7 +81,7 @@ run_with_timeout() {
     shift || true
 
     # No timeout if duration is invalid or zero
-    if [[ ! "$duration" =~ ^[0-9]+$ ]] || [[ "$duration" -le 0 ]]; then
+    if [[ ! "$duration" =~ ^[0-9]+(\.[0-9]+)?$ ]] || [[ $(echo "$duration <= 0" | bc -l 2> /dev/null) -eq 1 ]]; then
         "$@"
         return $?
     fi