Add park and ride card components with advanced search functionality

- Implemented park card component with image, status badge, favorite button, and quick stats overlay.
- Developed ride card component featuring thrill level badge, status badge, favorite button, and detailed stats.
- Created advanced search page with filters for parks and rides, including location, type, status, and thrill level.
- Added dynamic quick search functionality with results display.
- Enhanced user experience with JavaScript for filter toggling, range slider updates, and view switching.
- Included custom CSS for improved styling of checkboxes and search results layout.

static/js/backup/theme.js

@@ -0,0 +1,16 @@
+/**
+ * Theme management script
+ * Prevents flash of wrong theme by setting theme class immediately
+ */
+(function() {
+  let theme = localStorage.getItem("theme");
+  if (!theme) {
+    theme = window.matchMedia("(prefers-color-scheme: dark)").matches
+      ? "dark"
+      : "light";
+    localStorage.setItem("theme", theme);
+  }
+  if (theme === "dark") {
+    document.documentElement.classList.add("dark");
+  }
+})();