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/components/__tests__/FloatingHelpButton.test.tsx

@@ -84,6 +84,42 @@ describe('FloatingHelpButton', () => {
       const link = screen.getByRole('link');
       expect(link).toHaveAttribute('href', '/dashboard/help/site-builder');
     });
+
+    it('links to /dashboard/help/locations for /dashboard/locations', () => {
+      renderWithRouter('/dashboard/locations');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/dashboard/help/locations');
+    });
+
+    it('links to /dashboard/help/settings/business-hours for /dashboard/settings/business-hours', () => {
+      renderWithRouter('/dashboard/settings/business-hours');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/dashboard/help/settings/business-hours');
+    });
+
+    it('links to /dashboard/help/settings/email-templates for /dashboard/settings/email-templates', () => {
+      renderWithRouter('/dashboard/settings/email-templates');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/dashboard/help/settings/email-templates');
+    });
+
+    it('links to /dashboard/help/settings/embed-widget for /dashboard/settings/embed-widget', () => {
+      renderWithRouter('/dashboard/settings/embed-widget');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/dashboard/help/settings/embed-widget');
+    });
+
+    it('links to /dashboard/help/settings/staff-roles for /dashboard/settings/staff-roles', () => {
+      renderWithRouter('/dashboard/settings/staff-roles');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/dashboard/help/settings/staff-roles');
+    });
+
+    it('links to /dashboard/help/settings/communication for /dashboard/settings/sms-calling', () => {
+      renderWithRouter('/dashboard/settings/sms-calling');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/dashboard/help/settings/communication');
+    });
   });
 
   describe('non-dashboard routes (public/platform)', () => {
@@ -111,6 +147,42 @@ describe('FloatingHelpButton', () => {
       expect(link).toHaveAttribute('href', '/help/settings/general');
     });
 
+    it('links to /help/locations for /locations', () => {
+      renderWithRouter('/locations');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/help/locations');
+    });
+
+    it('links to /help/settings/business-hours for /settings/business-hours', () => {
+      renderWithRouter('/settings/business-hours');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/help/settings/business-hours');
+    });
+
+    it('links to /help/settings/email-templates for /settings/email-templates', () => {
+      renderWithRouter('/settings/email-templates');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/help/settings/email-templates');
+    });
+
+    it('links to /help/settings/embed-widget for /settings/embed-widget', () => {
+      renderWithRouter('/settings/embed-widget');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/help/settings/embed-widget');
+    });
+
+    it('links to /help/settings/staff-roles for /settings/staff-roles', () => {
+      renderWithRouter('/settings/staff-roles');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/help/settings/staff-roles');
+    });
+
+    it('links to /help/settings/communication for /settings/sms-calling', () => {
+      renderWithRouter('/settings/sms-calling');
+      const link = screen.getByRole('link');
+      expect(link).toHaveAttribute('href', '/help/settings/communication');
+    });
+
     it('returns null on /help pages', () => {
       const { container } = renderWithRouter('/help/dashboard');
       expect(container.firstChild).toBeNull();