diff --git a/docs/frontend/shared/ui-components-quick-reference.md b/docs/frontend/shared/ui-components-quick-reference.md
index d2e30d38..e6968221 100644
--- a/docs/frontend/shared/ui-components-quick-reference.md
+++ b/docs/frontend/shared/ui-components-quick-reference.md
@@ -484,6 +484,141 @@ Reusable macros for shop/storefront functionality. Located in `app/templates/sha
 
 **Tab options:** `description`, `specifications`, `reviews`, `shipping`, `warranty`
 
+### 📂 Category Navigation (Priority 4)
+```html
+{% from 'shared/macros/shop/category-nav.html' import category_nav, category_tree, category_menu %}
+
+{# Sidebar with nested categories #}
+{{ category_nav(categories_var='categories', current_var='currentCategory', show_count=true) }}
+
+{# Horizontal pills #}
+{{ category_tree(categories_var='categories', layout='horizontal') }}
+
+{# Header dropdown menu #}
+{{ category_menu(categories_var='mainCategories') }}
+```
+
+**Macros:** `category_nav()`, `category_tree()`, `category_menu()`, `category_drawer()`
+
+### 🍞 Breadcrumbs (Priority 4)
+```html
+{% from 'shared/macros/shop/breadcrumbs.html' import shop_breadcrumbs, compact_breadcrumbs %}
+
+{# Static breadcrumbs #}
+{{ shop_breadcrumbs(items=[
+    {'label': 'Electronics', 'url': '/electronics'},
+    {'label': 'Audio', 'url': '/audio'},
+    {'label': 'Headphones'}
+]) }}
+
+{# Mobile-friendly compact #}
+{{ compact_breadcrumbs(parent={'label': 'Audio', 'url': '/audio'}, current='Headphones') }}
+```
+
+**Macros:** `shop_breadcrumbs()`, `auto_breadcrumbs()`, `compact_breadcrumbs()`
+
+### 🔍 Search Bar (Priority 4)
+```html
+{% from 'shared/macros/shop/search-bar.html' import search_bar, search_autocomplete %}
+
+{# Basic search #}
+{{ search_bar(placeholder='Search products...') }}
+
+{# With search button #}
+{{ search_bar(placeholder='Search...', show_button=true, size='lg') }}
+
+{# Autocomplete with suggestions #}
+{{ search_autocomplete(search_endpoint='/api/search', show_recent=true, show_popular=true) }}
+```
+
+**Macros:** `search_bar()`, `search_autocomplete()`, `mobile_search()`, `search_trigger()`
+
+### 🎛️ Filter Sidebar (Priority 4)
+```html
+{% from 'shared/macros/shop/filter-sidebar.html' import filter_sidebar, price_filter, sort_dropdown %}
+
+{# Complete filter panel #}
+{{ filter_sidebar(filters_var='filters', active_filters_var='activeFilters', on_change='filterProducts()') }}
+
+{# Standalone price filter #}
+{{ price_filter(min=0, max=500, on_change='updateFilters()') }}
+
+{# Sort dropdown #}
+{{ sort_dropdown(value_var='sortBy', on_change='sortProducts()') }}
+```
+
+**Macros:** `filter_sidebar()`, `price_filter()`, `rating_filter()`, `sort_dropdown()`, `mobile_filter_drawer()`
+
+### ⭐ Star Rating (Priority 5)
+```html
+{% from 'shared/macros/shop/star-rating.html' import star_rating, rating_input, rating_summary, compact_rating %}
+
+{# Static star rating with half-star support #}
+{{ star_rating(rating=4.5, show_value=true, show_count=true, count=127) }}
+
+{# Dynamic rating from Alpine.js #}
+{{ star_rating(rating_var='product.rating', show_count=true, count_var='product.review_count') }}
+
+{# Interactive rating input #}
+{{ rating_input(model='userRating', size='lg', allow_half=true) }}
+
+{# Rating summary with distribution bars #}
+{{ rating_summary(rating_var='rating', count_var='reviewCount', distribution_var='ratingDistribution') }}
+
+{# Compact rating for lists/cards #}
+{{ compact_rating(rating=4.5, count=127, size='sm') }}
+```
+
+**Macros:** `star_rating()`, `rating_input()`, `rating_summary()`, `compact_rating()`
+
+### 💬 Reviews (Priority 5)
+```html
+{% from 'shared/macros/shop/reviews.html' import review_card, review_list, review_form, review_summary_section %}
+
+{# Single review card with helpful buttons #}
+{{ review_card(review_var='review', on_helpful='markHelpful(review.id)') }}
+
+{# Review list with sorting #}
+{{ review_list(reviews_var='reviews', sort_var='reviewSort', on_helpful='markHelpful') }}
+
+{# Review submission form #}
+{{ review_form(rating_model='rating', title_model='title', content_model='content', on_submit='submitReview()') }}
+
+{# Complete review summary section #}
+{{ review_summary_section(rating_var='rating', count_var='count', distribution_var='dist', on_write='openForm()') }}
+```
+
+**Macros:** `review_card()`, `review_list()`, `review_form()`, `review_summary_section()`
+
+### 🛡️ Trust Badges (Priority 5)
+```html
+{% from 'shared/macros/shop/trust-badges.html' import trust_badges, trust_banner, payment_icons, guarantee_badge, security_seals, checkout_trust_section %}
+
+{# Trust badges grid #}
+{{ trust_badges(badges=['secure_payment', 'free_shipping', 'easy_returns', 'support_24_7'], layout='grid') }}
+
+{# Trust banner variants #}
+{{ trust_banner() }}
+{{ trust_banner(variant='compact') }}
+{{ trust_banner(variant='detailed') }}
+
+{# Payment method icons #}
+{{ payment_icons(methods=['visa', 'mastercard', 'paypal', 'apple_pay']) }}
+{{ payment_icons(methods=['visa', 'mastercard'], size='lg') }}
+
+{# Guarantee badges #}
+{{ guarantee_badge(type='money_back', days=30) }}
+{{ guarantee_badge(type='satisfaction', variant='filled') }}
+
+{# Security seals #}
+{{ security_seals(seals=['ssl', 'verified']) }}
+
+{# Complete checkout trust section #}
+{{ checkout_trust_section() }}
+```
+
+**Macros:** `trust_badges()`, `trust_banner()`, `payment_icons()`, `guarantee_badge()`, `security_seals()`, `checkout_trust_section()`
+
 ### E-commerce Alpine.js State
 ```javascript
 // Required state variables for e-commerce components
@@ -512,6 +647,44 @@ Reusable macros for shop/storefront functionality. Located in `app/templates/sha
     selectedColor: null,
     activeProductTab: 'description',
 
+    // Navigation & Discovery (Priority 4)
+    categories: [],
+    currentCategory: null,
+    breadcrumbs: [],
+
+    // Filters (Priority 4)
+    filters: {
+        categories: [],
+        brands: [],
+        priceRange: { min: 0, max: 1000 },
+        attributes: {},
+        ratings: []
+    },
+    activeFilters: {
+        categories: [],
+        brands: [],
+        priceMin: undefined,
+        priceMax: undefined,
+        rating: undefined,
+        attributes: {},
+        inStock: false
+    },
+    sortBy: 'relevance',
+
+    // Mobile UI (Priority 4)
+    showMobileSearch: false,
+    showMobileFilters: false,
+    showCategoryDrawer: false,
+
+    // Reviews & Ratings (Priority 5)
+    reviews: [],
+    reviewSort: 'newest',
+    userRating: 0,
+    ratingDistribution: { 5: 0, 4: 0, 3: 0, 2: 0, 1: 0 },
+    newReview: { rating: 0, title: '', content: '' },
+    submittingReview: false,
+    showReviewForm: false,
+
     // Wishlist
     toggleWishlist(product) {
         product.in_wishlist = !product.in_wishlist;
@@ -524,6 +697,23 @@ Reusable macros for shop/storefront functionality. Located in `app/templates/sha
     },
     removeFromCart(itemId) {
         this.cart.items = this.cart.items.filter(i => i.id !== itemId);
+    },
+
+    // Filter actions (Priority 4)
+    filterProducts() {
+        // Apply filters and update products...
+    },
+    sortProducts() {
+        // Sort products by sortBy value...
+    },
+
+    // Review actions (Priority 5)
+    submitReview() {
+        this.submittingReview = true;
+        // API call to submit review...
+    },
+    markHelpful(reviewId, helpful) {
+        // Mark review as helpful/not helpful...
     }
 }
 ```