🎯 [FIX] Exclude search box from Many2Many/One2Many fields within forms

- Enhanced _shouldAddSearchBox logic to detect relational field contexts
- Added comprehensive DOM traversal to identify form-embedded lists
- Prevents search box appearance in o_field_widget, o_field_many2many, o_field_one2many
- Maintains search functionality for standalone list views only
- Added size-based filtering for small embedded lists
- Preserves all existing functionality for main list views

odex25_base/fims_general_search_tree_view/static/src/js/list_search.js

@@ -390,11 +390,54 @@ odoo.define('fims_general_search_tree_view.list_search', function (require) {
         },
         
         _shouldAddSearchBox: function() {
-            return this.arch && 
-                   this.arch.tag === 'tree' && 
-                   this.$el && 
-                   this.$el.hasClass('o_list_view') &&
-                   !this.$el.find('.oe_search_container').length;
+            // Basic requirements check
+            if (!this.arch || 
+                this.arch.tag !== 'tree' || 
+                !this.$el || 
+                !this.$el.hasClass('o_list_view') ||
+                this.$el.find('.oe_search_container').length > 0) {
+                return false;
+            }
+
+            // Check if this is inside a relational field (Many2Many/One2Many)
+            // Look for parent containers that indicate we're inside a form field
+            var $parent = this.$el.parent();
+            
+            // Check for various indicators that we're inside a relational field
+            while ($parent.length > 0) {
+                // Check if parent has classes that indicate it's a field widget
+                if ($parent.hasClass('o_field_widget') || 
+                    $parent.hasClass('o_field_many2many') || 
+                    $parent.hasClass('o_field_one2many') ||
+                    $parent.hasClass('o_field_x2many_list') ||
+                    $parent.hasClass('o_x2many_control_panel') ||
+                    $parent.attr('name') && $parent.closest('.o_form_view').length > 0) {
+                    return false; // Don't show search box in relational fields
+                }
+                
+                // Check if we're inside a form view (not a standalone list view)
+                if ($parent.hasClass('o_form_view') && 
+                    this.$el.closest('.o_content').find('.o_form_view').length > 0) {
+                    return false; // Don't show in embedded lists within forms
+                }
+                
+                // Stop at main content area
+                if ($parent.hasClass('o_content') || 
+                    $parent.hasClass('o_action_manager') ||
+                    $parent.hasClass('o_main_content')) {
+                    break;
+                }
+                
+                $parent = $parent.parent();
+            }
+
+            // Additional check: if the list is very small (likely embedded), don't show
+            if (this.$el.find('tbody tr').length <= 5 && 
+                this.$el.closest('.o_form_view').length > 0) {
+                return false;
+            }
+
+            return true; // Show search box for standalone list views
         },
         
         _addCustomSearchBox: function() {