feat: add backend caching and pagination for resources

Co-authored-by: aider (openrouter/thinkingmachines/inkling-small:free) <aider@aider.chat>

frontend/index.html

@@ -31,7 +31,8 @@
 
     <section id="search">
       <input type="text" id="search-input" placeholder="Search by name..." />
-      <button id="search-btn">Search / Refresh</button>
+      <button id="search-btn">Search</button>
+      <button id="refresh-btn">Refresh</button>
     </section>
 
     <section id="resources">