feat(help): Add floating help button to all pages

Replaced inline HelpButton components with a global FloatingHelpButton
that appears fixed in the top-right corner of all pages. The button:
- Automatically detects the current route and links to the appropriate help page
- Uses a consistent position across all pages (fixed, top-right)
- Is hidden on help pages themselves
- Works on both business and platform layouts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

frontend/src/components/FloatingHelpButton.tsx

@@ -0,0 +1,94 @@
+/**
+ * FloatingHelpButton Component
+ *
+ * A floating help button fixed in the top-right corner of the screen.
+ * Automatically determines the help path based on the current route.
+ */
+
+import React from 'react';
+import { Link, useLocation } from 'react-router-dom';
+import { HelpCircle } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
+
+// Map routes to their help paths
+const routeToHelpPath: Record<string, string> = {
+  '/': '/help/dashboard',
+  '/dashboard': '/help/dashboard',
+  '/scheduler': '/help/scheduler',
+  '/tasks': '/help/tasks',
+  '/customers': '/help/customers',
+  '/services': '/help/services',
+  '/resources': '/help/resources',
+  '/staff': '/help/staff',
+  '/messages': '/help/messages',
+  '/tickets': '/help/ticketing',
+  '/payments': '/help/payments',
+  '/plugins': '/help/plugins',
+  '/plugins/marketplace': '/help/plugins',
+  '/plugins/my-plugins': '/help/plugins',
+  '/plugins/create': '/help/plugins/create',
+  '/settings': '/help/settings/general',
+  '/settings/general': '/help/settings/general',
+  '/settings/resource-types': '/help/settings/resource-types',
+  '/settings/booking': '/help/settings/booking',
+  '/settings/appearance': '/help/settings/appearance',
+  '/settings/email': '/help/settings/email',
+  '/settings/domains': '/help/settings/domains',
+  '/settings/api': '/help/settings/api',
+  '/settings/auth': '/help/settings/auth',
+  '/settings/billing': '/help/settings/billing',
+  '/settings/quota': '/help/settings/quota',
+  // Platform routes
+  '/platform/dashboard': '/help/dashboard',
+  '/platform/businesses': '/help/dashboard',
+  '/platform/users': '/help/staff',
+  '/platform/tickets': '/help/ticketing',
+};
+
+const FloatingHelpButton: React.FC = () => {
+  const { t } = useTranslation();
+  const location = useLocation();
+
+  // Get the help path for the current route
+  const getHelpPath = (): string => {
+    // Exact match first
+    if (routeToHelpPath[location.pathname]) {
+      return routeToHelpPath[location.pathname];
+    }
+
+    // Try matching with a prefix (for dynamic routes like /customers/:id)
+    const pathSegments = location.pathname.split('/').filter(Boolean);
+    if (pathSegments.length > 0) {
+      // Try progressively shorter paths
+      for (let i = pathSegments.length; i > 0; i--) {
+        const testPath = '/' + pathSegments.slice(0, i).join('/');
+        if (routeToHelpPath[testPath]) {
+          return routeToHelpPath[testPath];
+        }
+      }
+    }
+
+    // Default to the main help guide
+    return '/help';
+  };
+
+  const helpPath = getHelpPath();
+
+  // Don't show on help pages themselves
+  if (location.pathname.startsWith('/help')) {
+    return null;
+  }
+
+  return (
+    <Link
+      to={helpPath}
+      className="fixed top-20 right-4 z-50 inline-flex items-center justify-center w-10 h-10 bg-white dark:bg-gray-800 text-gray-500 dark:text-gray-400 hover:text-brand-600 dark:hover:text-brand-400 hover:bg-gray-100 dark:hover:bg-gray-700 rounded-full shadow-lg border border-gray-200 dark:border-gray-700 transition-all duration-200 hover:scale-110"
+      title={t('common.help', 'Help')}
+      aria-label={t('common.help', 'Help')}
+    >
+      <HelpCircle size={20} />
+    </Link>
+  );
+};
+
+export default FloatingHelpButton;