Add comprehensive tenant API documentation and settings help pages

- Create 6 new tenant API documentation pages:
  - HelpApiOverview: Authentication, scopes, rate limits, errors
  - HelpApiAppointments: CRUD operations for appointments
  - HelpApiServices: Read-only service catalog access
  - HelpApiResources: Staff, rooms, equipment endpoints
  - HelpApiCustomers: Customer management endpoints
  - HelpApiWebhooks: Real-time event subscriptions

- Create 6 new settings help pages for granular documentation

- Update HelpComprehensive with API section linking to new docs
- Update platform HelpApiDocs with comprehensive endpoint coverage
- Fix non-clickable /api/v1/docs/ links (now opens in new tab)
- Add routes for all new help pages in App.tsx
- Update FloatingHelpButton with new help page mappings

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/i18n/locales/en.json

@@ -3059,6 +3059,7 @@
       "timeBlocks": "Time Blocks",
       "plugins": "Plugins",
       "contracts": "Contracts",
+      "locations": "Locations",
       "settings": "Settings",
       "servicesSetup": "Services Setup",
       "resourcesSetup": "Resources Setup",
@@ -3070,7 +3071,12 @@
       "billing": "Billing",
       "apiSettings": "API Settings",
       "authentication": "Authentication",
-      "usageQuota": "Usage & Quota"
+      "usageQuota": "Usage & Quota",
+      "businessHours": "Business Hours",
+      "emailTemplates": "Email Templates",
+      "embedWidget": "Embed Widget",
+      "staffRoles": "Staff Roles",
+      "smsCalling": "SMS & Calling"
     },
     "introduction": {
       "title": "Introduction",
@@ -3336,6 +3342,19 @@
       "contractsDocumentation": "Contracts Documentation",
       "contractsDocumentationDesc": "Complete guide to templates, signing, and compliance features"
     },
+    "locations": {
+      "title": "Locations",
+      "description": "Manage multiple business locations, each with their own address, contact info, and assigned resources and services.",
+      "keyFeatures": "Key Features",
+      "primaryLocation": "Primary Location",
+      "primaryLocationDesc": "Designate one location as your primary business address",
+      "activateDeactivate": "Activate/Deactivate",
+      "activateDeactivateDesc": "Temporarily disable locations without deleting them",
+      "addressManagement": "Address Management",
+      "addressManagementDesc": "Full address, phone, email, and timezone for each location",
+      "locationsDocumentation": "Locations Documentation",
+      "locationsDocumentationDesc": "Complete guide to multi-location management"
+    },
     "settings": {
       "title": "Settings",
       "description": "Settings is where business owners configure their scheduling platform. Most settings are owner-only and affect how your business operates.",
@@ -3383,7 +3402,17 @@
       "apiSettingsLink": "API Settings",
       "apiSettingsLinkDesc": "API keys and webhooks",
       "usageQuotaLink": "Usage & Quota",
-      "usageQuotaLinkDesc": "Track usage and limits"
+      "usageQuotaLinkDesc": "Track usage and limits",
+      "businessHoursLink": "Business Hours",
+      "businessHoursLinkDesc": "Configure operating hours for each day",
+      "emailTemplatesFullLink": "Email Templates",
+      "emailTemplatesFullLinkDesc": "Customize automated email content",
+      "embedWidgetLink": "Embed Widget",
+      "embedWidgetLinkDesc": "Add booking to external websites",
+      "staffRolesLink": "Staff Roles",
+      "staffRolesLinkDesc": "Configure permissions for staff members",
+      "smsCallingLink": "SMS & Calling",
+      "smsCallingLinkDesc": "Manage communication credits and phone numbers"
     },
     "footer": {
       "title": "Need More Help?",