feat(web): Schedule-First redesign

- Top header bar + narrow sidebar layout
- Dashboard: calendar-style schedule with timeline cards
- Clients: card-based layout with avatar initials and pet count
- Services: grid cards with emoji indicators and pricing
- Bookings: timeline cards with time slots, status chips, inline actions
- Invoices: cards with status badges, action buttons
- All pages: search bars, empty states, modal forms
- Consistent color system: indigo primary, amber alerts, gray hierarchy

web/sketches/003-warm-playful/README.md

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+## Variant 3: Warm & Playful
+
+### Design stance
+Friendly and approachable — the CRM that feels like it belongs at a pet-friendly business. Pastel colors, rounded everything, soft shadows, illustrated icons. Makes scheduling feel fun rather than administrative.
+
+### Key choices
+- **Layout:** Centered content, no sidebar (top nav), rounded cards on warm white background
+- **Typography:** Nunito (rounded sans-serif), generous line-height, soft colors
+- **Color:** Warm palette — peach, mint, lavender, lemon. No harsh blacks.
+- **Interaction:** Hover lifts with soft shadows, rounded buttons, emoji-heavy pet indicators
+- **Density:** Low — breathing room between elements, big touch targets
+
+### Trade-offs
+- **Strong at:** Approachability, brand personality, client-facing self-booking, onboarding new staff
+- **Weak at:** Data density, dark mode, quick scanning for power users
+
+### Best for
+- Pet businesses with personality, client self-booking experience, teams that value culture and warmth