docs: Update CLAUDE.md with UX improvement progress

- Added issue tracking table
- Documented Issue #1 completion (inline creation modals)
- Added Issue #2 implementation plan (smart density defaults)
- Added material density reference table

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

CLAUDE.md

@@ -118,5 +118,45 @@ Environment variables (see `.env.example`):
 
 - **URL:** http://192.168.0.5:3022/tonym/spoolman2
 - **API Token:** 8a04b3cb5dbb54e2d895b707305523c3ad83a945
+- **Upstream:** https://github.com/Donkie/Spoolman (remote: `upstream`)
 
 This is a fork with UX improvements. Issues are tracked on the Gitea instance above.
+
+## UX Improvement Issues
+
+| # | Title | Status |
+|---|-------|--------|
+| 1 | Inline Creation Modals | ✅ DONE |
+| 2 | Smart Density Defaults | 🔄 NEXT |
+| 3 | QR Code Sizing Fixes | Open |
+| 4 | Layout Max-Width | Open |
+| 5 | Temperature Ranges | Open |
+| 6 | Spool Adjustment History | Open |
+| 7 | 3dfilamentprofiles Integration | Open |
+
+### Issue #1 Complete - Inline Creation Modals
+
+Added ability to create filament/vendor inline without leaving the page:
+- `client/src/components/vendorCreateModal.tsx` - Quick vendor creation
+- `client/src/components/filamentCreateModal.tsx` - Quick filament creation with nested vendor modal
+- Modified spool create to add "Create Filament" in dropdown
+- Modified filament create to add "Create Manufacturer" in dropdown
+- Uses `dropdownRender` pattern (same as location select)
+- Uses `useInvalidate` to refresh lists after creation
+
+### Issue #2 Next - Smart Density Defaults
+
+Plan: Auto-fill density based on material type
+- Create `client/src/utils/materialDefaults.ts` with density lookup table
+- Convert material field to AutoComplete (dropdown + free text)
+- Fuzzy matching: "PLA Silk" → PLA (1.24 g/cm³)
+- Default diameter: 1.75mm, default density: 1.24 (PLA)
+- Apply to FilamentCreateModal too
+- Do NOT auto-fill on edit page (preserve user customizations)
+
+Material densities:
+```
+PLA: 1.24, ABS: 1.04, PETG: 1.27, NYLON: 1.52, TPU: 1.21
+PC: 1.3, Wood: 1.28, CF: 1.3, PC/ABS: 1.19, HIPS: 1.03
+PVA: 1.23, ASA: 1.05, PP: 0.9, POM: 1.4, PMMA: 1.18, FPE: 2.16
+```