Add pagination to search page with configurable items per page

- Added pagination state (currentPage, pageSize) to search.js
- Implemented getPaginatedResults() function to slice filtered results
- Added getTotalPages() and helper functions for pagination math
- Added pagination UI controls to search.html:
  * Items per page dropdown (15, 30, 60 options)
  * Previous/Next navigation buttons
  * Page info display (Page X of Y)
  * Result summary showing item range
- Integrated pagination with search filtering:
  * Resets to page 1 on new search
  * Disables nav buttons at boundaries
  * Updates page info after each action
- Added comprehensive CSS styling for responsive pagination controls
- Updated README with pagination features and usage

Features:
✓ Filter results first, then paginate
✓ Smart button disabling at boundaries
✓ Auto-reset to page 1 on search
✓ Dynamic page count updates
✓ Responsive design on mobile devices

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

search.js

@@ -1,5 +1,9 @@
 // search.js - Search module with inventory data and filtering logic
 
+// Pagination state
+export let currentPage = 1;
+export let pageSize = 15;
+
 // Helper function to create a date string
 function getDate(daysFromNow) {
   const date = new Date();
@@ -116,3 +120,56 @@ export function getLocations() {
   const locations = [...new Set(inventoryData.map(item => item.location))];
   return ['All', ...locations.sort()];
 }
+
+/**
+ * Set the page size for pagination
+ * @param {number} size - Items per page (15, 30, or 60)
+ */
+export function setPageSize(size) {
+  pageSize = size;
+  currentPage = 1;
+}
+
+/**
+ * Set the current page
+ * @param {number} page - Page number
+ */
+export function setCurrentPage(page) {
+  currentPage = page;
+}
+
+/**
+ * Get total number of pages
+ * @param {number} totalItems - Total items to paginate
+ * @returns {number} Number of pages
+ */
+export function getTotalPages(totalItems) {
+  return Math.ceil(totalItems / pageSize);
+}
+
+/**
+ * Get paginated results from filtered items
+ * @param {Array} filteredItems - Filtered inventory items
+ * @returns {Object} Object with paginated items and pagination info
+ */
+export function getPaginatedResults(filteredItems) {
+  const totalItems = filteredItems.length;
+  const totalPages = getTotalPages(totalItems);
+  
+  if (currentPage < 1) currentPage = 1;
+  if (currentPage > totalPages && totalPages > 0) currentPage = totalPages;
+  
+  const startIndex = (currentPage - 1) * pageSize;
+  const endIndex = startIndex + pageSize;
+  const paginatedItems = filteredItems.slice(startIndex, endIndex);
+  
+  return {
+    items: paginatedItems,
+    currentPage,
+    pageSize,
+    totalPages,
+    totalItems,
+    startIndex: totalItems > 0 ? startIndex + 1 : 0,
+    endIndex: Math.min(endIndex, totalItems)
+  };
+}