Add dashboard redesign, custom section builder, and enhanced search functionality

Features:
- Complete dashboard redesign with improved UI components and layout
- Implement custom section builder for personalized book organization
- Add new events tracking system for user interactions
- Enhance search functionality with better static search.js
- Update TypeScript type definitions for API responses

Backend:
- Update Go dependencies in go.mod
- Add new frontend routes in router

Templates:
- Update admin and dashboard templates with new components

Frontend:
- Refactor analytics, collections, conflicts, and queue modules
- Add new documentation features in docs.ts
- Implement linking between books and collections
- Add toast notifications for user feedback
- Include placeholder book SVG asset

This commit consolidates multiple feature additions and improvements
across the entire stack including backend, templates, and frontend.

web/src/docs.ts

@@ -15,13 +15,13 @@ function initializeDocsSearch(): void {
 
     if (!searchInput || !searchResults) return;
 
-    let searchTimeout: ReturnType<typeof setTimeout> | null = null;
+    let docsSearchTimeout: ReturnType<typeof setTimeout> | null = null;
 
     searchInput.addEventListener('input', () => {
         const query = searchInput.value.trim();
 
-        if (searchTimeout) {
-            clearTimeout(searchTimeout);
+        if (docsSearchTimeout) {
+            clearTimeout(docsSearchTimeout);
         }
 
         if (query.length < 2) {
@@ -30,7 +30,7 @@ function initializeDocsSearch(): void {
             return;
         }
 
-        searchTimeout = setTimeout(() => {
+        docsSearchTimeout = setTimeout(() => {
             performDocsSearch(query);
         }, 300);
     });