fix(tests): add audit-diff tool to MCP server tool tests (#25006)

Author: Copilot

pkg/cli/mcp_server_tools_test.go

@@ -47,7 +47,7 @@ func TestMCPServer_ListTools(t *testing.T) {
 	}
 
 	// Verify expected tools are present
-	expectedTools := []string{"status", "compile", "logs", "audit", "checks", "mcp-inspect", "add", "update", "fix"}
+	expectedTools := []string{"status", "compile", "logs", "audit", "audit-diff", "checks", "mcp-inspect", "add", "update", "fix"}
 	toolNames := make(map[string]bool)
 	for _, tool := range result.Tools {
 		toolNames[tool.Name] = true
@@ -264,6 +264,7 @@ func TestMCPServer_ToolIcons(t *testing.T) {
 		"compile":     "🔨",
 		"logs":        "📜",
 		"audit":       "🔍",
+		"audit-diff":  "🔍",
 		"checks":      "✅",
 		"mcp-inspect": "🔎",
 		"add":         "➕",