Feature: Add customer reviews system with admin management

- Add Review model to database with approval workflow
- Customers can submit reviews with 1-5 star ratings
- Admin can approve, reject, or delete reviews
- Public reviews page showing all approved reviews with rating stats
- ReviewForm component for easy integration on product pages
- Bulk gallery upload now properly tracked

Chore: Add expected delivery date for design approvals

- Add expectedDeliveryDate field to DesignApproval model
- Admin can set delivery date when approving designs
- Improves customer communication and expectations

Chore: Add welcome back message for logged-in customers

- Display personalized greeting on account page after login
- Shows customer's name if available

Chore: Add color difference disclaimer to product pages

- Added to StandardProductView (ready-made products)
- Added to DesignCanvas (personalized products)
- Informs customers about lighting-based color variations
- Helps manage customer expectations

Feature: Add image identification in design specifications

- Images now clearly labeled as "Image 1", "Image 2", etc.
- Images marked with purple circles in specification diagrams
- Improves clarity for production team

Documentation: Add comprehensive database optimization guide

- DATABASE_OPTIMIZATION.md - Full optimization strategies
- DATABASE_OPTIMIZATION_QUICK_START.md - Implementation examples
- DATABASE_OPTIMIZATION_MIGRATION.sql - Ready-to-run indexes
- Covers indexing, pagination, caching, and monitoring

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

prisma/migrations/20260719165224_add_expected_delivery_date/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "DesignApproval" ADD COLUMN     "expectedDeliveryDate" TIMESTAMP(3);

prisma/migrations/20260719165812_add_customer_reviews/migration.sql

@@ -0,0 +1,22 @@
+-- CreateTable
+CREATE TABLE "Review" (
+    "id" TEXT NOT NULL,
+    "customerId" TEXT,
+    "customerEmail" TEXT NOT NULL,
+    "customerName" TEXT,
+    "productId" TEXT NOT NULL,
+    "rating" INTEGER NOT NULL,
+    "title" TEXT NOT NULL,
+    "comment" TEXT NOT NULL,
+    "approved" BOOLEAN NOT NULL DEFAULT false,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Review_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "Review" ADD CONSTRAINT "Review_customerId_fkey" FOREIGN KEY ("customerId") REFERENCES "Customer"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Review" ADD CONSTRAINT "Review_productId_fkey" FOREIGN KEY ("productId") REFERENCES "Product"("id") ON DELETE CASCADE ON UPDATE CASCADE;