Refactor keyword handling: Replace 'intent' with 'country' across backend and frontend

- Updated AutomationService to include estimated_word_count.
- Increased stage_1_batch_size from 20 to 50 in AutomationViewSet.
- Changed Keywords model to replace 'intent' property with 'country'.
- Adjusted ClusteringService to allow a maximum of 50 keywords for clustering.
- Modified admin and management commands to remove 'intent' and use 'country' instead.
- Updated serializers to reflect the change from 'intent' to 'country'.
- Adjusted views and filters to use 'country' instead of 'intent'.
- Updated frontend forms, filters, and pages to replace 'intent' with 'country'.
- Added migration to remove 'intent' field and add 'country' field to SeedKeyword model.

backend/igny8_core/auth/admin.py

@@ -548,18 +548,18 @@ class IndustrySectorAdmin(Igny8ModelAdmin):
 @admin.register(SeedKeyword)
 class SeedKeywordAdmin(Igny8ModelAdmin):
     """SeedKeyword admin - Global reference data, no account filtering"""
-    list_display = ['keyword', 'industry', 'sector', 'volume', 'difficulty', 'intent', 'is_active', 'created_at']
-    list_filter = ['is_active', 'industry', 'sector', 'intent']
+    list_display = ['keyword', 'industry', 'sector', 'volume', 'difficulty', 'country', 'is_active', 'created_at']
+    list_filter = ['is_active', 'industry', 'sector', 'country']
     search_fields = ['keyword']
     readonly_fields = ['created_at', 'updated_at']
     actions = ['delete_selected']  # Enable bulk delete
     
     fieldsets = (
         ('Keyword Info', {
-            'fields': ('keyword', 'industry', 'sector', 'is_active')
+            'fields': ('keyword', 'industry', 'sector', 'country', 'is_active')
         }),
         ('SEO Metrics', {
-            'fields': ('volume', 'difficulty', 'intent')
+            'fields': ('volume', 'difficulty')
         }),
         ('Timestamps', {
             'fields': ('created_at', 'updated_at')