feat: initial commit — HermesMessages SaaS platform

Backend (FastAPI + Python 3.12):
- Multi-tenant auth with JWT: login, register, refresh, Meta OAuth
- Business & BusinessConfig management
- WhatsApp webhook with HMAC signature verification
- Bot engine powered by Claude AI
- Calendar availability with Redis caching
- Reservations CRUD with status management
- Dashboard analytics (stats, agenda, peak hours)
- Billing & plan management
- Admin panel with platform-wide stats
- Async bcrypt via asyncio.to_thread
- IntegrityError handling for concurrent registration race conditions

Frontend (React 18 + Vite + Tailwind CSS):
- Multi-step guided registration form with helper text on every field
- Login page with show/hide password toggle
- Protected routes with AuthContext
- Dashboard with stats cards, bar chart, and daily agenda
- Reservations list with search, filters, and inline status actions
- Calendar with weekly view, slot availability, and date blocking
- Config page: business info, schedules, bot personality
- Billing page with plan comparison and usage bar

Design system:
- Bricolage Grotesque + DM Sans typography
- Emerald primary palette with semantic color tokens
- scale(0.97) button press feedback, ease-out animations
- Skeleton loaders, stagger animations, prefers-reduced-motion support
- Accessible: aria-labels, visible focus rings, 4.5:1 contrast

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/tailwind.config.js

@@ -0,0 +1,93 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: ['./index.html', './src/**/*.{js,jsx,ts,tsx}'],
+  theme: {
+    extend: {
+      fontFamily: {
+        display: ['"Bricolage Grotesque"', 'sans-serif'],
+        body: ['"DM Sans"', 'sans-serif'],
+      },
+      colors: {
+        bg: '#f7f8fc',
+        surface: '#ffffff',
+        border: '#e1e7ef',
+        primary: {
+          DEFAULT: '#059669',
+          50: '#ecfdf5',
+          100: '#d1fae5',
+          200: '#a7f3d0',
+          500: '#10b981',
+          600: '#059669',
+          700: '#047857',
+          900: '#064e3b',
+        },
+        slate: {
+          50: '#f8fafc',
+          100: '#f1f5f9',
+          200: '#e2e8f0',
+          300: '#cbd5e1',
+          400: '#94a3b8',
+          500: '#64748b',
+          600: '#475569',
+          700: '#334155',
+          800: '#1e293b',
+          900: '#0f172a',
+        },
+        danger: {
+          DEFAULT: '#dc2626',
+          50: '#fef2f2',
+          100: '#fee2e2',
+          500: '#ef4444',
+          600: '#dc2626',
+        },
+        warning: {
+          DEFAULT: '#d97706',
+          50: '#fffbeb',
+          100: '#fef3c7',
+          500: '#f59e0b',
+          600: '#d97706',
+        },
+      },
+      boxShadow: {
+        card: '0 1px 3px 0 rgb(0 0 0 / 0.06), 0 1px 2px -1px rgb(0 0 0 / 0.04)',
+        'card-hover': '0 4px 12px 0 rgb(0 0 0 / 0.08), 0 2px 4px -1px rgb(0 0 0 / 0.04)',
+        dialog: '0 20px 60px -10px rgb(0 0 0 / 0.15)',
+      },
+      borderRadius: {
+        DEFAULT: '0.5rem',
+        lg: '0.75rem',
+        xl: '1rem',
+        '2xl': '1.25rem',
+      },
+      animation: {
+        'fade-in': 'fadeIn 0.2s ease-out',
+        'slide-up': 'slideUp 0.25s cubic-bezier(0.23, 1, 0.32, 1)',
+        'stagger-1': 'fadeSlideUp 0.3s cubic-bezier(0.23, 1, 0.32, 1) 0ms both',
+        'stagger-2': 'fadeSlideUp 0.3s cubic-bezier(0.23, 1, 0.32, 1) 50ms both',
+        'stagger-3': 'fadeSlideUp 0.3s cubic-bezier(0.23, 1, 0.32, 1) 100ms both',
+        'stagger-4': 'fadeSlideUp 0.3s cubic-bezier(0.23, 1, 0.32, 1) 150ms both',
+        'stagger-5': 'fadeSlideUp 0.3s cubic-bezier(0.23, 1, 0.32, 1) 200ms both',
+        'skeleton': 'skeleton 1.5s ease-in-out infinite',
+      },
+      keyframes: {
+        fadeIn: {
+          from: { opacity: '0' },
+          to: { opacity: '1' },
+        },
+        slideUp: {
+          from: { opacity: '0', transform: 'translateY(8px)' },
+          to: { opacity: '1', transform: 'translateY(0)' },
+        },
+        fadeSlideUp: {
+          from: { opacity: '0', transform: 'translateY(6px)' },
+          to: { opacity: '1', transform: 'translateY(0)' },
+        },
+        skeleton: {
+          '0%, 100%': { opacity: '1' },
+          '50%': { opacity: '0.4' },
+        },
+      },
+    },
+  },
+  plugins: [],
+}