feat: Enhance AI Agent and Channel Management

- Updated labels in the AI Agents dashboard for clarity, changing "流程状态" to "Playbook 状态" and "未发布流程" to "未发布 Playbook".
- Introduced AI Agent rollout percentage management in channel editing, allowing users to set and rollback rollout percentages.
- Added new API endpoints for rolling back AI Agent rollout and fetching agent run metrics.
- Implemented new UI components for displaying agent run details, including status, duration, and input/output tokens.
- Enhanced type definitions for AdminChannel and AIAgent to include rollout percentages and runtime modes.
- Updated navigation to include a section for agent runs.
- Added new translations for agent run features in both English and Chinese.

internal/ai/application/runtime/einoexperiment/mcp_tool.go

@@ -0,0 +1,37 @@
+package einoexperiment
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"agent-desk/internal/ai/mcps"
+	runtimetooling "agent-desk/internal/ai/runtime/tooling"
+	aitooling "agent-desk/internal/ai/tooling"
+)
+
+// MCPToolExecutor is the narrow execution boundary used by the Eino
+// experiment. The production MCP executor remains responsible for dynamic
+// registry resolution, policy enforcement, timeout, and transport lifecycle.
+type MCPToolExecutor interface {
+	Execute(context.Context, string, map[string]any, aitooling.Policy) (aitooling.Definition, *mcps.ToolCallResult, error)
+}
+
+// NewMCPToolHandler adapts a dynamically discovered MCP tool to GuardedTool.
+// Callers must still configure GuardedTool.Definition and Policy so its
+// pre-handler guard provides a deterministic rejection before MCP transport.
+func NewMCPToolHandler(executor MCPToolExecutor, toolCode string, policy aitooling.Policy) ToolHandler {
+	return func(ctx context.Context, arguments map[string]any) (string, error) {
+		if executor == nil {
+			return "", fmt.Errorf("eino experiment MCP executor is required")
+		}
+		definition, result, err := executor.Execute(ctx, strings.TrimSpace(toolCode), arguments, policy)
+		if err != nil {
+			return "", err
+		}
+		if definition.Code == "" {
+			return "", fmt.Errorf("MCP executor returned an empty tool definition")
+		}
+		return runtimetooling.BuildReducedToolResultSummary(result), nil
+	}
+}