Refactor AI Agent configuration and workflow handling

- Removed runtime mode handling from AIAgentConfigWorkbench and related components.
- Updated tests to reflect changes in AI Agent policy copy and configuration.
- Changed terminology from "workflow" to "revision" in various components and API responses.
- Simplified agent binding logic in channel editing.
- Cleaned up unused variables and types related to runtime modes.
- Updated localization files for consistency with new terminology.

internal/services/ai_workflow_service_test.go

@@ -103,8 +103,8 @@ func TestAIWorkflowServicePublishCreatesImmutableVersion(t *testing.T) {
 	}
 }
 
-func TestAIWorkflowServicePlaybookTemplatesAreValid(t *testing.T) {
-	templates := AIWorkflowService.ListPlaybookTemplates()
+func TestAIWorkflowServiceWorkflowTemplatesAreValid(t *testing.T) {
+	templates := AIWorkflowService.ListWorkflowTemplates()
 	if len(templates) != 4 {
 		t.Fatalf("template count = %d, want 4", len(templates))
 	}