feat: Improve onboarding wizard UI, UX and dark mode support

This commit implements multiple improvements to the onboarding wizard:

**1. Unified UI Components:**
- Created InfoCard component for consistent "why is important" blocks across all steps
- Created TemplateCard component for consistent template displays
- Both components use global CSS variables for proper dark mode support

**2. Initial Stock Entry Step Improvements:**
- Fixed title/subtitle positioning using unified InfoCard component
- Fixed missing count bug in warning message (now uses {{count}} interpolation)
- Fixed dark mode colors using CSS variables (--color-success, --color-info, etc.)
- Changed next button title from "completar configuración" to "Continuar →"
- Implemented stock creation API call using useAddStock hook
- Products with stock now properly save to backend on step completion

**3. Dark Mode Fixes:**
- Fixed QualitySetupStep: Enhanced button selection visibility with rings and shadows
- Fixed TeamSetupStep: Enhanced role selection visibility with rings and shadows
- Fixed AddressAutocomplete: Replaced all hardcoded colors with CSS variables
- All dropdown results, icons, and hover states now properly adapt to dark mode

**4. Streamlined Wizard Flow:**
- Removed POI Detection step from wizard (step previously added complexity)
- POI detection now runs automatically in background after tenant registration
- Non-blocking approach ensures users aren't delayed by POI detection
- Removed Revision step (setup-review) as it adds no user value
- Completion step is now the final step before dashboard

**5. Backend Updates:**
- Updated onboarding_progress.py to remove poi-detection from ONBOARDING_STEPS
- Updated onboarding_progress.py to remove setup-review from ONBOARDING_STEPS
- Updated step dependencies to reflect streamlined flow
- POI detection documented as automatic background process

All changes maintain backward compatibility and use proper TypeScript types.

frontend/src/components/domain/onboarding/UnifiedOnboardingWizard.tsx

@@ -11,7 +11,6 @@ import { WizardProvider, useWizardContext, BakeryType, DataSource } from './cont
 import {
   BakeryTypeSelectionStep,
   RegisterTenantStep,
-  POIDetectionStep,
   FileUploadStep,
   InventoryReviewStep,
   ProductCategorizationStep,
@@ -75,15 +74,7 @@ const OnboardingWizardContent: React.FC = () => {
       isConditional: true,
       condition: (ctx) => ctx.state.bakeryType !== null,
     },
-    // Phase 2b: POI Detection
-    {
-      id: 'poi-detection',
-      title: t('onboarding:steps.poi_detection.title', 'Detección de Ubicación'),
-      description: t('onboarding:steps.poi_detection.description', 'Analizar puntos de interés cercanos'),
-      component: POIDetectionStep,
-      isConditional: true,
-      condition: (ctx) => ctx.state.bakeryType !== null && ctx.state.bakeryLocation !== undefined,
-    },
+    // POI Detection removed - now happens automatically in background after tenant registration
     // Phase 2a: AI-Assisted Inventory Setup (REFACTORED - split into 3 focused steps)
     {
       id: 'upload-sales-data',
@@ -159,14 +150,7 @@ const OnboardingWizardContent: React.FC = () => {
       component: MLTrainingStep,
       // Always show - no conditional
     },
-    {
-      id: 'setup-review',
-      title: t('onboarding:steps.review.title', 'Revisión'),
-      description: t('onboarding:steps.review.description', 'Confirma tu configuración'),
-      component: ReviewSetupStep,
-      isConditional: true,
-      condition: (ctx) => ctx.state.bakeryType !== null, // Tenant created after bakeryType is set
-    },
+    // Revision step removed - not useful for user, completion step is final step
     {
       id: 'completion',
       title: t('onboarding:steps.completion.title', 'Completado'),
@@ -562,12 +546,6 @@ const OnboardingWizardContent: React.FC = () => {
                       initialStock: undefined,
                     }))
                   }
-                : // Pass tenant info to POI detection step
-                currentStep.id === 'poi-detection'
-                ? {
-                    tenantId: wizardContext.state.tenantId,
-                    bakeryLocation: wizardContext.state.bakeryLocation,
-                  }
                 : undefined
             }
           />