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/pages/Services.tsx

@@ -1,7 +1,6 @@
 import React, { useState, useRef } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Plus, Pencil, Trash2, Clock, DollarSign, X, Loader2, GripVertical, Eye, ChevronRight, Upload, ImagePlus, Image } from 'lucide-react';
-import HelpButton from '../components/HelpButton';
 import { useServices, useCreateService, useUpdateService, useDeleteService, useReorderServices } from '../hooks/useServices';
 import { Service } from '../types';
 
@@ -267,16 +266,13 @@ const Services: React.FC = () => {
   return (
     <div className="p-8 space-y-6">
       <div className="flex items-center justify-between">
-        <div className="flex items-start gap-4">
-          <div>
-            <h2 className="text-2xl font-bold text-gray-900 dark:text-white">
-              {t('services.title', 'Services')}
-            </h2>
-            <p className="text-gray-500 dark:text-gray-400">
-              {t('services.description', 'Manage the services your business offers')}
-            </p>
-          </div>
-          <HelpButton helpPath="/help/services" />
+        <div>
+          <h2 className="text-2xl font-bold text-gray-900 dark:text-white">
+            {t('services.title', 'Services')}
+          </h2>
+          <p className="text-gray-500 dark:text-gray-400">
+            {t('services.description', 'Manage the services your business offers')}
+          </p>
         </div>
         <button
           onClick={openCreateModal}