Add list tools; normalize tool names and paths in transcript

internal/agents/antigravity.go

@@ -1,6 +1,7 @@
 package agents
 
 import (
+	"cmp"
 	"context"
 	"encoding/json"
 	"fmt"
@@ -132,6 +133,13 @@ func agyToolCall(name string, params json.RawMessage) (string, any, error) {
 		}{}
 		err := json.Unmarshal(params, &p)
 		return "Bash", map[string]any{"command": p.CommandLine}, err
+	case "read_file", "view_file":
+		p := struct {
+			Path         string
+			AbsolutePath string
+		}{}
+		err := json.Unmarshal(params, &p)
+		return "Read", map[string]any{"file_path": cmp.Or(p.Path, p.AbsolutePath)}, err
 	case "call_mcp_tool":
 		p := struct {
 			ServerName string