Add T1 Empty States & Onboarding section

Home.md

@@ -19,6 +19,17 @@ Mobile-first web app for tracking physical assets via barcode scanning, OCR stic
 - **More popover** — 'More' tab opens popover with Customers, Reports, Activity, Settings (replaces drawer open)
 - **Slide transitions** — Smooth slide animations when switching between tab pages
 
+### T1 Empty States & Onboarding — May 2026
+- **Consistent design pattern** across all pages: `renderEmptyState(icon, heading, desc, btnLabel, btnAction)`
+- **Customers:** "No Customers Yet" with 🏢 icon, description, "Add Customer" CTA
+- **Locations (customer detail):** "No Locations Yet" with 📍 icon, "Add Location" CTA
+- **Dashboard:** Per-section empty states with descriptive hints of what would appear (categories, status bars, visit data, activity)
+- **Reports:** All 4 sections (Service Summary, Visit Frequency, Time-on-Site per Tech, Time-on-Site per Asset) use empty state cards with guidance
+- **Activity Feed:** "No Activity Yet" with CTA when no events exist
+- **Onboarding:** Welcome overlay on first login with localStorage `canteen_onboarded` flag
+- **Accessibility:** Modal overlay toggles `aria-hidden` on open/close for screen readers
+- Commits: 6c1d5c3 (main), 1a87427 (geofence fix), 845523c (aria-hidden)
+
 ### T9 Modal/Dialog System — May 2026
 - **Custom modal system** replaced all native browser `prompt()`, `alert()`, `confirm()` calls
 - Supports 4 modal types: **confirm** (yes/no), **alert** (OK only), **prompt** (text input), **form** (multi-field)