diff --git a/backend/src/routes/tasks.ts b/backend/src/routes/tasks.ts
index 1b85948e..8764eefa 100644
--- a/backend/src/routes/tasks.ts
+++ b/backend/src/routes/tasks.ts
@@ -26,6 +26,7 @@
  */
 
 import { Router, Request, Response } from 'express';
+import { authMiddleware } from '../auth/middleware';
 import {
   taskService,
   TaskRole,
@@ -1918,4 +1919,292 @@ router.get('/pools/:id', async (req: Request, res: Response) => {
   }
 });
 
+// ============================================================
+// INVENTORY SNAPSHOTS API
+// Part of Real-Time Inventory Tracking feature
+// ============================================================
+
+/**
+ * GET /inventory-snapshots
+ * Get inventory snapshots with optional filters
+ */
+router.get('/inventory-snapshots', authMiddleware, async (req: Request, res: Response) => {
+  try {
+    const dispensaryId = req.query.dispensary_id ? parseInt(req.query.dispensary_id as string) : undefined;
+    const productId = req.query.product_id as string | undefined;
+    const limit = req.query.limit ? parseInt(req.query.limit as string) : 100;
+    const offset = req.query.offset ? parseInt(req.query.offset as string) : 0;
+
+    let query = `
+      SELECT
+        s.id,
+        s.dispensary_id,
+        d.name as dispensary_name,
+        s.product_id,
+        s.platform,
+        s.quantity_available,
+        s.is_below_threshold,
+        s.status,
+        s.price_rec,
+        s.price_med,
+        s.brand_name,
+        s.category,
+        s.product_name,
+        s.captured_at
+      FROM inventory_snapshots s
+      JOIN dispensaries d ON d.id = s.dispensary_id
+      WHERE 1=1
+    `;
+    const params: any[] = [];
+    let paramIndex = 1;
+
+    if (dispensaryId) {
+      query += ` AND s.dispensary_id = $${paramIndex++}`;
+      params.push(dispensaryId);
+    }
+
+    if (productId) {
+      query += ` AND s.product_id = $${paramIndex++}`;
+      params.push(productId);
+    }
+
+    query += ` ORDER BY s.captured_at DESC LIMIT $${paramIndex++} OFFSET $${paramIndex++}`;
+    params.push(limit, offset);
+
+    const { rows } = await pool.query(query, params);
+
+    // Get total count
+    let countQuery = `SELECT COUNT(*) FROM inventory_snapshots WHERE 1=1`;
+    const countParams: any[] = [];
+    let countParamIndex = 1;
+
+    if (dispensaryId) {
+      countQuery += ` AND dispensary_id = $${countParamIndex++}`;
+      countParams.push(dispensaryId);
+    }
+    if (productId) {
+      countQuery += ` AND product_id = $${countParamIndex++}`;
+      countParams.push(productId);
+    }
+
+    const { rows: countRows } = await pool.query(countQuery, countParams);
+    const total = parseInt(countRows[0].count);
+
+    res.json({
+      success: true,
+      snapshots: rows,
+      count: total,
+      limit,
+      offset,
+    });
+  } catch (err: any) {
+    res.status(500).json({ success: false, error: err.message });
+  }
+});
+
+/**
+ * GET /inventory-snapshots/stats
+ * Get inventory snapshot statistics
+ */
+router.get('/inventory-snapshots/stats', authMiddleware, async (req: Request, res: Response) => {
+  try {
+    const { rows } = await pool.query(`
+      SELECT
+        COUNT(*) as total_snapshots,
+        COUNT(DISTINCT dispensary_id) as stores_tracked,
+        COUNT(DISTINCT product_id) as products_tracked,
+        MIN(captured_at) as oldest_snapshot,
+        MAX(captured_at) as newest_snapshot,
+        COUNT(*) FILTER (WHERE captured_at > NOW() - INTERVAL '24 hours') as snapshots_24h,
+        COUNT(*) FILTER (WHERE captured_at > NOW() - INTERVAL '1 hour') as snapshots_1h
+      FROM inventory_snapshots
+    `);
+
+    res.json({
+      success: true,
+      stats: rows[0],
+    });
+  } catch (err: any) {
+    res.status(500).json({ success: false, error: err.message });
+  }
+});
+
+// ============================================================
+// VISIBILITY EVENTS API
+// Part of Real-Time Inventory Tracking feature
+// ============================================================
+
+/**
+ * GET /visibility-events
+ * Get visibility events with optional filters
+ */
+router.get('/visibility-events', authMiddleware, async (req: Request, res: Response) => {
+  try {
+    const dispensaryId = req.query.dispensary_id ? parseInt(req.query.dispensary_id as string) : undefined;
+    const brand = req.query.brand as string | undefined;
+    const eventType = req.query.event_type as string | undefined;
+    const limit = req.query.limit ? parseInt(req.query.limit as string) : 100;
+    const offset = req.query.offset ? parseInt(req.query.offset as string) : 0;
+
+    let query = `
+      SELECT
+        e.id,
+        e.dispensary_id,
+        d.name as dispensary_name,
+        e.product_id,
+        e.product_name,
+        e.brand_name,
+        e.event_type,
+        e.detected_at,
+        e.previous_quantity,
+        e.previous_price,
+        e.new_price,
+        e.price_change_pct,
+        e.platform,
+        e.notified,
+        e.acknowledged_at
+      FROM product_visibility_events e
+      JOIN dispensaries d ON d.id = e.dispensary_id
+      WHERE 1=1
+    `;
+    const params: any[] = [];
+    let paramIndex = 1;
+
+    if (dispensaryId) {
+      query += ` AND e.dispensary_id = $${paramIndex++}`;
+      params.push(dispensaryId);
+    }
+
+    if (brand) {
+      query += ` AND e.brand_name ILIKE $${paramIndex++}`;
+      params.push(`%${brand}%`);
+    }
+
+    if (eventType) {
+      query += ` AND e.event_type = $${paramIndex++}`;
+      params.push(eventType);
+    }
+
+    query += ` ORDER BY e.detected_at DESC LIMIT $${paramIndex++} OFFSET $${paramIndex++}`;
+    params.push(limit, offset);
+
+    const { rows } = await pool.query(query, params);
+
+    // Get total count
+    let countQuery = `SELECT COUNT(*) FROM product_visibility_events WHERE 1=1`;
+    const countParams: any[] = [];
+    let countParamIndex = 1;
+
+    if (dispensaryId) {
+      countQuery += ` AND dispensary_id = $${countParamIndex++}`;
+      countParams.push(dispensaryId);
+    }
+    if (brand) {
+      countQuery += ` AND brand_name ILIKE $${countParamIndex++}`;
+      countParams.push(`%${brand}%`);
+    }
+    if (eventType) {
+      countQuery += ` AND event_type = $${countParamIndex++}`;
+      countParams.push(eventType);
+    }
+
+    const { rows: countRows } = await pool.query(countQuery, countParams);
+    const total = parseInt(countRows[0].count);
+
+    res.json({
+      success: true,
+      events: rows,
+      count: total,
+      limit,
+      offset,
+    });
+  } catch (err: any) {
+    res.status(500).json({ success: false, error: err.message });
+  }
+});
+
+/**
+ * GET /visibility-events/stats
+ * Get visibility event statistics
+ */
+router.get('/visibility-events/stats', authMiddleware, async (req: Request, res: Response) => {
+  try {
+    const { rows } = await pool.query(`
+      SELECT
+        COUNT(*) as total_events,
+        COUNT(*) FILTER (WHERE event_type = 'oos') as oos_events,
+        COUNT(*) FILTER (WHERE event_type = 'back_in_stock') as back_in_stock_events,
+        COUNT(*) FILTER (WHERE event_type = 'brand_dropped') as brand_dropped_events,
+        COUNT(*) FILTER (WHERE event_type = 'brand_added') as brand_added_events,
+        COUNT(*) FILTER (WHERE event_type = 'price_change') as price_change_events,
+        COUNT(*) FILTER (WHERE detected_at > NOW() - INTERVAL '24 hours') as events_24h,
+        COUNT(*) FILTER (WHERE acknowledged_at IS NOT NULL) as acknowledged_events,
+        COUNT(*) FILTER (WHERE notified = TRUE) as notified_events
+      FROM product_visibility_events
+    `);
+
+    res.json({
+      success: true,
+      stats: rows[0],
+    });
+  } catch (err: any) {
+    res.status(500).json({ success: false, error: err.message });
+  }
+});
+
+/**
+ * POST /visibility-events/:id/acknowledge
+ * Acknowledge a visibility event
+ */
+router.post('/visibility-events/:id/acknowledge', authMiddleware, async (req: Request, res: Response) => {
+  try {
+    const eventId = parseInt(req.params.id);
+    const acknowledgedBy = (req as any).user?.email || 'unknown';
+
+    await pool.query(`
+      UPDATE product_visibility_events
+      SET acknowledged_at = NOW(),
+          acknowledged_by = $2
+      WHERE id = $1
+    `, [eventId, acknowledgedBy]);
+
+    res.json({
+      success: true,
+      message: 'Event acknowledged',
+    });
+  } catch (err: any) {
+    res.status(500).json({ success: false, error: err.message });
+  }
+});
+
+/**
+ * POST /visibility-events/acknowledge-bulk
+ * Acknowledge multiple visibility events
+ */
+router.post('/visibility-events/acknowledge-bulk', authMiddleware, async (req: Request, res: Response) => {
+  try {
+    const { event_ids } = req.body;
+    if (!event_ids || !Array.isArray(event_ids)) {
+      return res.status(400).json({ success: false, error: 'event_ids array required' });
+    }
+
+    const acknowledgedBy = (req as any).user?.email || 'unknown';
+
+    const { rowCount } = await pool.query(`
+      UPDATE product_visibility_events
+      SET acknowledged_at = NOW(),
+          acknowledged_by = $2
+      WHERE id = ANY($1)
+    `, [event_ids, acknowledgedBy]);
+
+    res.json({
+      success: true,
+      message: `${rowCount} events acknowledged`,
+      count: rowCount,
+    });
+  } catch (err: any) {
+    res.status(500).json({ success: false, error: err.message });
+  }
+});
+
 export default router;
diff --git a/backend/src/services/analytics/SalesAnalyticsService.ts b/backend/src/services/analytics/SalesAnalyticsService.ts
new file mode 100644
index 00000000..a05c975a
--- /dev/null
+++ b/backend/src/services/analytics/SalesAnalyticsService.ts
@@ -0,0 +1,589 @@
+/**
+ * SalesAnalyticsService
+ *
+ * Market intelligence and sales velocity analytics using materialized views.
+ * Provides fast queries for dashboards with pre-computed metrics.
+ *
+ * Data Sources:
+ * - mv_daily_sales_estimates: Daily sales from inventory deltas
+ * - mv_brand_market_share: Brand penetration by state
+ * - mv_sku_velocity: SKU velocity rankings
+ * - mv_store_performance: Dispensary performance rankings
+ * - mv_category_weekly_trends: Weekly category trends
+ * - mv_product_intelligence: Per-product Hoodie-style metrics
+ */
+
+import { pool } from '../../db/pool';
+import { TimeWindow, DateRange, getDateRangeFromWindow } from './types';
+
+// ============================================================
+// TYPES
+// ============================================================
+
+export interface DailySalesEstimate {
+  dispensary_id: number;
+  product_id: string;
+  brand_name: string | null;
+  category: string | null;
+  sale_date: string;
+  avg_price: number | null;
+  units_sold: number;
+  units_restocked: number;
+  revenue_estimate: number;
+  snapshot_count: number;
+}
+
+export interface BrandMarketShare {
+  brand_name: string;
+  state_code: string;
+  stores_carrying: number;
+  total_stores: number;
+  penetration_pct: number;
+  sku_count: number;
+  in_stock_skus: number;
+  avg_price: number | null;
+}
+
+export interface SkuVelocity {
+  product_id: string;
+  brand_name: string | null;
+  category: string | null;
+  dispensary_id: number;
+  dispensary_name: string;
+  state_code: string;
+  total_units_30d: number;
+  total_revenue_30d: number;
+  days_with_sales: number;
+  avg_daily_units: number;
+  avg_price: number | null;
+  velocity_tier: 'hot' | 'steady' | 'slow' | 'stale';
+}
+
+export interface StorePerformance {
+  dispensary_id: number;
+  dispensary_name: string;
+  city: string | null;
+  state_code: string;
+  total_revenue_30d: number;
+  total_units_30d: number;
+  total_skus: number;
+  in_stock_skus: number;
+  unique_brands: number;
+  unique_categories: number;
+  avg_price: number | null;
+  last_updated: string | null;
+}
+
+export interface CategoryWeeklyTrend {
+  category: string;
+  state_code: string;
+  week_start: string;
+  sku_count: number;
+  store_count: number;
+  total_units: number;
+  total_revenue: number;
+  avg_price: number | null;
+}
+
+export interface ProductIntelligence {
+  dispensary_id: number;
+  dispensary_name: string;
+  state_code: string;
+  city: string | null;
+  sku: string;
+  product_name: string | null;
+  brand: string | null;
+  category: string | null;
+  is_in_stock: boolean;
+  stock_status: string | null;
+  stock_quantity: number | null;
+  price: number | null;
+  first_seen: string | null;
+  last_seen: string | null;
+  stock_diff_120: number;
+  days_since_oos: number | null;
+  days_until_stock_out: number | null;
+  avg_daily_units: number | null;
+}
+
+export interface ViewRefreshResult {
+  view_name: string;
+  rows_affected: number;
+}
+
+// ============================================================
+// SERVICE CLASS
+// ============================================================
+
+export class SalesAnalyticsService {
+  /**
+   * Get daily sales estimates with filters
+   */
+  async getDailySalesEstimates(options: {
+    stateCode?: string;
+    brandName?: string;
+    category?: string;
+    dispensaryId?: number;
+    dateRange?: DateRange;
+    limit?: number;
+  } = {}): Promise<DailySalesEstimate[]> {
+    const { stateCode, brandName, category, dispensaryId, dateRange, limit = 100 } = options;
+    const params: (string | number | Date)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    if (stateCode) {
+      conditions.push(`d.state = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+    if (brandName) {
+      conditions.push(`dse.brand_name ILIKE $${paramIdx++}`);
+      params.push(`%${brandName}%`);
+    }
+    if (category) {
+      conditions.push(`dse.category = $${paramIdx++}`);
+      params.push(category);
+    }
+    if (dispensaryId) {
+      conditions.push(`dse.dispensary_id = $${paramIdx++}`);
+      params.push(dispensaryId);
+    }
+    if (dateRange) {
+      conditions.push(`dse.sale_date >= $${paramIdx++}`);
+      params.push(dateRange.start);
+      conditions.push(`dse.sale_date <= $${paramIdx++}`);
+      params.push(dateRange.end);
+    }
+
+    params.push(limit);
+
+    const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
+
+    const result = await pool.query(`
+      SELECT dse.*
+      FROM mv_daily_sales_estimates dse
+      JOIN dispensaries d ON d.id = dse.dispensary_id
+      ${whereClause}
+      ORDER BY dse.sale_date DESC, dse.revenue_estimate DESC
+      LIMIT $${paramIdx}
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      dispensary_id: row.dispensary_id,
+      product_id: row.product_id,
+      brand_name: row.brand_name,
+      category: row.category,
+      sale_date: row.sale_date?.toISOString().split('T')[0] || '',
+      avg_price: row.avg_price ? parseFloat(row.avg_price) : null,
+      units_sold: parseInt(row.units_sold) || 0,
+      units_restocked: parseInt(row.units_restocked) || 0,
+      revenue_estimate: parseFloat(row.revenue_estimate) || 0,
+      snapshot_count: parseInt(row.snapshot_count) || 0,
+    }));
+  }
+
+  /**
+   * Get brand market share by state
+   */
+  async getBrandMarketShare(options: {
+    stateCode?: string;
+    brandName?: string;
+    minPenetration?: number;
+    limit?: number;
+  } = {}): Promise<BrandMarketShare[]> {
+    const { stateCode, brandName, minPenetration = 0, limit = 100 } = options;
+    const params: (string | number)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    if (stateCode) {
+      conditions.push(`state_code = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+    if (brandName) {
+      conditions.push(`brand_name ILIKE $${paramIdx++}`);
+      params.push(`%${brandName}%`);
+    }
+    if (minPenetration > 0) {
+      conditions.push(`penetration_pct >= $${paramIdx++}`);
+      params.push(minPenetration);
+    }
+
+    params.push(limit);
+
+    const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
+
+    const result = await pool.query(`
+      SELECT *
+      FROM mv_brand_market_share
+      ${whereClause}
+      ORDER BY penetration_pct DESC, stores_carrying DESC
+      LIMIT $${paramIdx}
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      brand_name: row.brand_name,
+      state_code: row.state_code,
+      stores_carrying: parseInt(row.stores_carrying) || 0,
+      total_stores: parseInt(row.total_stores) || 0,
+      penetration_pct: parseFloat(row.penetration_pct) || 0,
+      sku_count: parseInt(row.sku_count) || 0,
+      in_stock_skus: parseInt(row.in_stock_skus) || 0,
+      avg_price: row.avg_price ? parseFloat(row.avg_price) : null,
+    }));
+  }
+
+  /**
+   * Get SKU velocity rankings
+   */
+  async getSkuVelocity(options: {
+    stateCode?: string;
+    brandName?: string;
+    category?: string;
+    dispensaryId?: number;
+    velocityTier?: 'hot' | 'steady' | 'slow' | 'stale';
+    limit?: number;
+  } = {}): Promise<SkuVelocity[]> {
+    const { stateCode, brandName, category, dispensaryId, velocityTier, limit = 100 } = options;
+    const params: (string | number)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    if (stateCode) {
+      conditions.push(`state_code = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+    if (brandName) {
+      conditions.push(`brand_name ILIKE $${paramIdx++}`);
+      params.push(`%${brandName}%`);
+    }
+    if (category) {
+      conditions.push(`category = $${paramIdx++}`);
+      params.push(category);
+    }
+    if (dispensaryId) {
+      conditions.push(`dispensary_id = $${paramIdx++}`);
+      params.push(dispensaryId);
+    }
+    if (velocityTier) {
+      conditions.push(`velocity_tier = $${paramIdx++}`);
+      params.push(velocityTier);
+    }
+
+    params.push(limit);
+
+    const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
+
+    const result = await pool.query(`
+      SELECT *
+      FROM mv_sku_velocity
+      ${whereClause}
+      ORDER BY total_units_30d DESC
+      LIMIT $${paramIdx}
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      product_id: row.product_id,
+      brand_name: row.brand_name,
+      category: row.category,
+      dispensary_id: row.dispensary_id,
+      dispensary_name: row.dispensary_name,
+      state_code: row.state_code,
+      total_units_30d: parseInt(row.total_units_30d) || 0,
+      total_revenue_30d: parseFloat(row.total_revenue_30d) || 0,
+      days_with_sales: parseInt(row.days_with_sales) || 0,
+      avg_daily_units: parseFloat(row.avg_daily_units) || 0,
+      avg_price: row.avg_price ? parseFloat(row.avg_price) : null,
+      velocity_tier: row.velocity_tier,
+    }));
+  }
+
+  /**
+   * Get dispensary performance rankings
+   */
+  async getStorePerformance(options: {
+    stateCode?: string;
+    sortBy?: 'revenue' | 'units' | 'brands' | 'skus';
+    limit?: number;
+  } = {}): Promise<StorePerformance[]> {
+    const { stateCode, sortBy = 'revenue', limit = 100 } = options;
+    const params: (string | number)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    if (stateCode) {
+      conditions.push(`state_code = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+
+    params.push(limit);
+
+    const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
+
+    const orderByMap: Record<string, string> = {
+      revenue: 'total_revenue_30d DESC',
+      units: 'total_units_30d DESC',
+      brands: 'unique_brands DESC',
+      skus: 'total_skus DESC',
+    };
+    const orderBy = orderByMap[sortBy] || orderByMap.revenue;
+
+    const result = await pool.query(`
+      SELECT *
+      FROM mv_store_performance
+      ${whereClause}
+      ORDER BY ${orderBy}
+      LIMIT $${paramIdx}
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      dispensary_id: row.dispensary_id,
+      dispensary_name: row.dispensary_name,
+      city: row.city,
+      state_code: row.state_code,
+      total_revenue_30d: parseFloat(row.total_revenue_30d) || 0,
+      total_units_30d: parseInt(row.total_units_30d) || 0,
+      total_skus: parseInt(row.total_skus) || 0,
+      in_stock_skus: parseInt(row.in_stock_skus) || 0,
+      unique_brands: parseInt(row.unique_brands) || 0,
+      unique_categories: parseInt(row.unique_categories) || 0,
+      avg_price: row.avg_price ? parseFloat(row.avg_price) : null,
+      last_updated: row.last_updated?.toISOString() || null,
+    }));
+  }
+
+  /**
+   * Get category weekly trends
+   */
+  async getCategoryTrends(options: {
+    stateCode?: string;
+    category?: string;
+    weeks?: number;
+  } = {}): Promise<CategoryWeeklyTrend[]> {
+    const { stateCode, category, weeks = 12 } = options;
+    const params: (string | number)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    if (stateCode) {
+      conditions.push(`state_code = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+    if (category) {
+      conditions.push(`category = $${paramIdx++}`);
+      params.push(category);
+    }
+
+    conditions.push(`week_start >= CURRENT_DATE - INTERVAL '${weeks} weeks'`);
+
+    const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
+
+    const result = await pool.query(`
+      SELECT *
+      FROM mv_category_weekly_trends
+      ${whereClause}
+      ORDER BY week_start DESC, total_revenue DESC
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      category: row.category,
+      state_code: row.state_code,
+      week_start: row.week_start?.toISOString().split('T')[0] || '',
+      sku_count: parseInt(row.sku_count) || 0,
+      store_count: parseInt(row.store_count) || 0,
+      total_units: parseInt(row.total_units) || 0,
+      total_revenue: parseFloat(row.total_revenue) || 0,
+      avg_price: row.avg_price ? parseFloat(row.avg_price) : null,
+    }));
+  }
+
+  /**
+   * Get product intelligence (Hoodie-style per-product metrics)
+   */
+  async getProductIntelligence(options: {
+    stateCode?: string;
+    brandName?: string;
+    category?: string;
+    dispensaryId?: number;
+    inStockOnly?: boolean;
+    lowStock?: boolean; // days_until_stock_out <= 7
+    recentOOS?: boolean; // days_since_oos <= 7
+    limit?: number;
+  } = {}): Promise<ProductIntelligence[]> {
+    const { stateCode, brandName, category, dispensaryId, inStockOnly, lowStock, recentOOS, limit = 100 } = options;
+    const params: (string | number)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    if (stateCode) {
+      conditions.push(`state_code = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+    if (brandName) {
+      conditions.push(`brand ILIKE $${paramIdx++}`);
+      params.push(`%${brandName}%`);
+    }
+    if (category) {
+      conditions.push(`category = $${paramIdx++}`);
+      params.push(category);
+    }
+    if (dispensaryId) {
+      conditions.push(`dispensary_id = $${paramIdx++}`);
+      params.push(dispensaryId);
+    }
+    if (inStockOnly) {
+      conditions.push(`is_in_stock = TRUE`);
+    }
+    if (lowStock) {
+      conditions.push(`days_until_stock_out IS NOT NULL AND days_until_stock_out <= 7`);
+    }
+    if (recentOOS) {
+      conditions.push(`days_since_oos IS NOT NULL AND days_since_oos <= 7`);
+    }
+
+    params.push(limit);
+
+    const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : '';
+
+    const result = await pool.query(`
+      SELECT *
+      FROM mv_product_intelligence
+      ${whereClause}
+      ORDER BY
+        CASE WHEN days_until_stock_out IS NOT NULL THEN 0 ELSE 1 END,
+        days_until_stock_out ASC NULLS LAST,
+        stock_quantity DESC
+      LIMIT $${paramIdx}
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      dispensary_id: row.dispensary_id,
+      dispensary_name: row.dispensary_name,
+      state_code: row.state_code,
+      city: row.city,
+      sku: row.sku,
+      product_name: row.product_name,
+      brand: row.brand,
+      category: row.category,
+      is_in_stock: row.is_in_stock,
+      stock_status: row.stock_status,
+      stock_quantity: row.stock_quantity ? parseInt(row.stock_quantity) : null,
+      price: row.price ? parseFloat(row.price) : null,
+      first_seen: row.first_seen?.toISOString() || null,
+      last_seen: row.last_seen?.toISOString() || null,
+      stock_diff_120: parseInt(row.stock_diff_120) || 0,
+      days_since_oos: row.days_since_oos ? parseInt(row.days_since_oos) : null,
+      days_until_stock_out: row.days_until_stock_out ? parseInt(row.days_until_stock_out) : null,
+      avg_daily_units: row.avg_daily_units ? parseFloat(row.avg_daily_units) : null,
+    }));
+  }
+
+  /**
+   * Get top selling brands by revenue
+   */
+  async getTopBrands(options: {
+    stateCode?: string;
+    window?: TimeWindow;
+    limit?: number;
+  } = {}): Promise<Array<{
+    brand_name: string;
+    total_revenue: number;
+    total_units: number;
+    store_count: number;
+    sku_count: number;
+    avg_price: number | null;
+  }>> {
+    const { stateCode, window = '30d', limit = 50 } = options;
+    const params: (string | number)[] = [];
+    let paramIdx = 1;
+    const conditions: string[] = [];
+
+    const dateRange = getDateRangeFromWindow(window);
+    conditions.push(`dse.sale_date >= $${paramIdx++}`);
+    params.push(dateRange.start.toISOString().split('T')[0]);
+
+    if (stateCode) {
+      conditions.push(`d.state = $${paramIdx++}`);
+      params.push(stateCode);
+    }
+
+    params.push(limit);
+
+    const whereClause = `WHERE ${conditions.join(' AND ')}`;
+
+    const result = await pool.query(`
+      SELECT
+        dse.brand_name,
+        SUM(dse.revenue_estimate) AS total_revenue,
+        SUM(dse.units_sold) AS total_units,
+        COUNT(DISTINCT dse.dispensary_id) AS store_count,
+        COUNT(DISTINCT dse.product_id) AS sku_count,
+        AVG(dse.avg_price) AS avg_price
+      FROM mv_daily_sales_estimates dse
+      JOIN dispensaries d ON d.id = dse.dispensary_id
+      ${whereClause}
+      AND dse.brand_name IS NOT NULL
+      GROUP BY dse.brand_name
+      ORDER BY total_revenue DESC
+      LIMIT $${paramIdx}
+    `, params);
+
+    return result.rows.map((row: any) => ({
+      brand_name: row.brand_name,
+      total_revenue: parseFloat(row.total_revenue) || 0,
+      total_units: parseInt(row.total_units) || 0,
+      store_count: parseInt(row.store_count) || 0,
+      sku_count: parseInt(row.sku_count) || 0,
+      avg_price: row.avg_price ? parseFloat(row.avg_price) : null,
+    }));
+  }
+
+  /**
+   * Refresh all materialized views
+   */
+  async refreshViews(): Promise<ViewRefreshResult[]> {
+    try {
+      const result = await pool.query('SELECT * FROM refresh_sales_analytics_views()');
+      return result.rows.map((row: any) => ({
+        view_name: row.view_name,
+        rows_affected: parseInt(row.rows_affected) || 0,
+      }));
+    } catch (error: any) {
+      // If function doesn't exist yet (migration not run), return empty
+      if (error.code === '42883') {
+        console.warn('[SalesAnalytics] refresh_sales_analytics_views() not found - run migration 121');
+        return [];
+      }
+      throw error;
+    }
+  }
+
+  /**
+   * Get view statistics (row counts)
+   */
+  async getViewStats(): Promise<Record<string, number>> {
+    const views = [
+      'mv_daily_sales_estimates',
+      'mv_brand_market_share',
+      'mv_sku_velocity',
+      'mv_store_performance',
+      'mv_category_weekly_trends',
+      'mv_product_intelligence',
+    ];
+
+    const stats: Record<string, number> = {};
+
+    for (const view of views) {
+      try {
+        const result = await pool.query(`SELECT COUNT(*) FROM ${view}`);
+        stats[view] = parseInt(result.rows[0].count) || 0;
+      } catch {
+        stats[view] = -1; // View doesn't exist yet
+      }
+    }
+
+    return stats;
+  }
+}
+
+export default new SalesAnalyticsService();