bug-fix: add automatic trash emptying to clean command (#363)

- Empty trash using macOS Finder API (osascript) for proper permission handling
- Respects whitelist protection (skips if Trash is whitelisted)
- Shows item count when emptying trash
- Fallback to direct cleanup if Finder API fails
- Supports dry-run mode

Issue: #362

lib/clean/user.sh

@@ -7,8 +7,24 @@ clean_user_essentials() {
     stop_section_spinner
 
     safe_clean ~/Library/Logs/* "User app logs"
+    
     if ! is_path_whitelisted "$HOME/.Trash"; then
-        safe_clean ~/.Trash/* "Trash"
+        local trash_count
+        trash_count=$(osascript -e 'tell application "Finder" to count items in trash' 2> /dev/null || echo "0")
+        [[ "$trash_count" =~ ^[0-9]+$ ]] || trash_count="0"
+        
+        if [[ "${DRY_RUN:-false}" == "true" ]]; then
+            [[ $trash_count -gt 0 ]] && echo -e "  ${YELLOW}${ICON_DRY_RUN}${NC} Trash · would empty ($trash_count items)" || echo -e "  ${GRAY}${ICON_EMPTY}${NC} Trash · already empty"
+        elif [[ $trash_count -gt 0 ]]; then
+            if osascript -e 'tell application "Finder" to empty trash' > /dev/null 2>&1; then
+                echo -e "  ${GREEN}${ICON_SUCCESS}${NC} Trash · emptied ($trash_count items)"
+                note_activity
+            else
+                safe_clean ~/.Trash/* "Trash"
+            fi
+        else
+            echo -e "  ${GRAY}${ICON_EMPTY}${NC} Trash · already empty"
+        fi
     fi
 }