Add cache clearing command to launcher

NEW FEATURE:
- launcher.sh --clear-cache: Clear all stale cache and temp files
- Clears .sysref.beta and .sysref.beta.timestamp
- Clears temporary files in tmp/ directory
- Auto-rebuilds cache on next run

USAGE:
  bash launcher.sh --clear-cache

SOLVES:
- Users can now easily clear stale cache
- WordPress site listings will update
- Database/user listings will refresh
- No more ghost entries from previous runs

ADDED TO HELP:
- Updated --help output with --clear-cache option
- Usage examples included

launcher.sh

@@ -780,13 +780,59 @@ main() {
             echo "═══════════════════════════════════════════════════════════════"
             return 0
             ;;
+        --clear-cache)
+            # Initialize directories first
+            init_directories || {
+                echo "ERROR: Failed to initialize directories"
+                return 1
+            }
+
+            # Clear all caches
+            local cache_cleared=0
+
+            # Production cache
+            if [ -f "$BASE_DIR/.sysref" ] || [ -f "$BASE_DIR/.sysref.timestamp" ]; then
+                rm -f "$BASE_DIR/.sysref" "$BASE_DIR/.sysref.timestamp" 2>/dev/null || true
+                echo "✓ Cleared production cache (.sysref)"
+                cache_cleared=1
+            fi
+
+            # Dev cache
+            if [ -f "$BASE_DIR/.sysref.beta" ] || [ -f "$BASE_DIR/.sysref.beta.timestamp" ]; then
+                rm -f "$BASE_DIR/.sysref.beta" "$BASE_DIR/.sysref.beta.timestamp" 2>/dev/null || true
+                echo "✓ Cleared dev cache (.sysref.beta)"
+                cache_cleared=1
+            fi
+
+            # Temp files
+            if [ -d "$BASE_DIR/tmp" ]; then
+                rm -rf "$BASE_DIR/tmp"/* 2>/dev/null || true
+                echo "✓ Cleared temporary files"
+                cache_cleared=1
+            fi
+
+            if [ $cache_cleared -eq 0 ]; then
+                echo "ℹ️  No cache files to clear"
+            else
+                echo ""
+                echo "Cache cleared successfully!"
+                echo "System will auto-detect and rebuild cache on next run."
+            fi
+            return 0
+            ;;
         --help|--usage|-h|-?)
             echo "Usage: launcher.sh [OPTIONS]"
             echo ""
             echo "Options:"
             echo "  --detect-only        Show system detection results and exit"
+            echo "  --clear-cache        Clear all cache and temporary files"
             echo "  --help               Show this help message"
             echo ""
+            echo "Examples:"
+            echo "  bash launcher.sh --detect-only      # Check what was detected"
+            echo "  bash launcher.sh --clear-cache      # Clear stale cache data"
+            echo "  bash launcher.sh                    # Normal interactive mode"
+            echo ""
             return 0
             ;;
     esac