docs: consolidate project tracking into PROGRESS.md

- Create PROGRESS.md as single source of truth for status
- Slim ROADMAP.md to vision only (~100 lines, down from ~500)
- Expand CLAUDE.md with streams, auth routing, forms, workflow
- Convert AGENTS.md to stub pointing to CLAUDE.md
- Update plan files with status headers, remove progress trackers

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

PROGRESS.md

@@ -0,0 +1,106 @@
+# SimpleShop Progress
+
+> Single source of truth for project status and task tracking.
+
+## Current Status
+
+**Working:**
+- Theme editor with 8 presets, instant switching, full customization
+- Image optimization pipeline (AVIF/WebP/JPEG responsive variants)
+- Shop pages (home, collections, products, cart, about, contact)
+- Mobile-first design with bottom navigation
+- 100% PageSpeed score
+
+**In Progress:**
+- Products context with provider integration (Phase 1 complete)
+
+## Next Up
+
+1. Wire Products context to shop LiveViews (replace PreviewData)
+2. Add Printify product sync worker
+3. Session-based cart with real variants
+
+---
+
+## Feature Areas
+
+### Theme System
+**Status:** Complete
+
+- 8 theme presets (Gallery, Studio, Boutique, etc.)
+- Three-layer CSS architecture (primitives, attributes, semantic)
+- Instant theme switching via CSS custom property injection
+- Logo/header image uploads with SVG recoloring
+- Self-hosted fonts (10 typefaces, GDPR compliant)
+- ETS-cached CSS generation
+
+### Image Optimization
+**Status:** Complete
+
+- Oban background job processing
+- Responsive `<picture>` element (AVIF/WebP/JPEG)
+- Only generates sizes <= source dimensions
+- Disk cache for variants (regenerable from DB)
+- `mix optimize_images` task for mockups
+- On-demand JPEG fallback generation
+
+See: [docs/plans/image-optimization.md](docs/plans/image-optimization.md) for implementation details
+
+### Products & Provider Integration
+**Status:** In Progress
+
+#### Completed
+- [x] Products context with schemas (c5c06d9)
+- [x] Provider abstraction layer
+- [x] Printify client integration
+- [x] Product/variant/image schemas
+
+#### Remaining Tasks
+- [ ] Add `list_products/1` to Printify client (~1hr)
+- [ ] Create ProductSyncWorker (Oban) (~1hr)
+- [ ] Wire shop LiveViews to Products context (~2hr)
+- [ ] Add variant selector component (~2hr)
+- [ ] Implement product sync mix task (~1hr)
+
+See: [docs/plans/products-context.md](docs/plans/products-context.md) for implementation details
+
+### Cart & Checkout
+**Status:** Planned
+
+- [ ] Session-based cart module
+- [ ] Cart LiveView with real variants
+- [ ] Stripe Checkout integration
+- [ ] Order creation and persistence
+
+See: [ROADMAP.md](ROADMAP.md) for design notes
+
+### Orders & Fulfillment
+**Status:** Planned
+
+- [ ] Orders context with schemas
+- [ ] Order submission to Printify
+- [ ] Order status tracking
+- [ ] Customer notifications
+
+See: [docs/plans/products-context.md](docs/plans/products-context.md) for schema design
+
+### Page Builder
+**Status:** Future
+
+Database-driven pages with drag-and-drop sections.
+
+See: [docs/plans/page-builder.md](docs/plans/page-builder.md) for design
+
+---
+
+## Completed Work Reference
+
+| Feature | Commit | Notes |
+|---------|--------|-------|
+| Products context Phase 1 | c5c06d9 | Schemas, provider abstraction |
+| Oban Lifeline plugin | c1e1988 | Rescue orphaned jobs |
+| Image optimization | Multiple | Full pipeline complete |
+| Self-hosted fonts | - | 10 typefaces, 728KB |
+| Mobile bottom nav | - | Fixed tab bar |
+| PageSpeed 100% | - | All optimizations |
+| Theme presets (8) | - | Gallery, Studio, etc. |