feat: Multi-role platform expansion, mobile nav redesign, and UI polish

- Add Owner, Contractor, Vendor, Subcontractor dashboards and role-based routing
- Owner now has superuser access to all Admin pages (dashboard, schedule, leaderboard)
- Redesign landing page mobile menu as slide-in sidebar (replaces broken Framer Motion overlay)
- Add body scroll lock to app sidebar for mobile consistency
- Fix Team Schedule to match Admin Dashboard design language (ambient glows, gradient header, SpotlightCard, zinc palette)
- Fix login page tab overflow — use abbreviated labels and grid layout for 6 role tabs
- Fix Recharts ResponsiveContainer warnings — replace height="100%" with fixed pixel heights
- Fix lightbox image viewer — unified nav bar, touch swipe support, no more overlapping text
- Add AI Assistant page, People/Vendor/Document management for Owner role
- Expand mock data store with contractor, vendor, and subcontractor data

src/pages/AiAssistantPage.jsx

@@ -0,0 +1,24 @@
+import React from 'react';
+import Chatbot from '../components/Chatbot';
+
+const AiAssistantPage = () => {
+    return (
+        <div className="h-full bg-zinc-50 dark:bg-black flex flex-col">
+            <div className="h-full flex flex-col">
+                <header className="p-4 md:p-6 border-b border-zinc-200 dark:border-zinc-800 bg-white/50 dark:bg-zinc-900/50 backdrop-blur-sm z-10">
+                    <h1 className="text-2xl font-bold text-zinc-900 dark:text-white flex items-center gap-2">
+                        <span className="w-2 h-6 bg-blue-500 rounded-full"></span>
+                        AI Assistant
+                    </h1>
+                    <p className="text-zinc-500 dark:text-zinc-400 text-sm ml-4">Your dedicated AI concierge for detailed insights and assistance.</p>
+                </header>
+
+                <div className="flex-1 min-h-0 relative">
+                    <Chatbot inline={true} />
+                </div>
+            </div>
+        </div>
+    );
+};
+
+export default AiAssistantPage;