feat: Qikink-style product editor with 6-view mockup canvas, color tinting, and per-size pricing

feat: Google OAuth, email notifications, admin users tab, price cap

feat: fix UH24 hoodie colors, print areas, and SKU catalog

feat: extract real PSD mockup PNGs and wire into canvas editor

feat: fix product mockup editor — unique images, color-aware canvas templates

fix: enable upload design for all users + add logout to dashboard

feat: product catalog redesign with real product images and collection grid

merge: resolve conflicts, keep 4-step catalog flow with updated canvas dims

feat: migrate MongoDB to Supabase PostgreSQL + full Qikink catalog + 4-step product selector

fix: replace Unsplash hoodie URL with local hoodie-grey.jpg across all files

fix: replace cloudfront t-shirt URL with local tshirt-whitefront mockup

feat: replace old mockup templates with high-quality Printful placeholder images

feat: Fabric.js canvas design editor + full Qikink UT27/UH24 pipeline

feat: full Qikink-powered upload → review → marketplace flow

feat: add Qikink print-on-demand integration