fix(chrome): record console levels on the logcat scale

Claude-Session: https://claude.ai/code/session_01ShuAy8q8ZfPi8KHxwc8JpQ

internal/driver/chrome/driver.go

@@ -79,14 +79,10 @@ func New() *Driver {
 				}
 			}
 		}
-		level := strings.ToUpper(string(e.Type))
-		if level == "LOG" {
-			level = "I"
-		}
 		d.logsMu.Lock()
 		d.logs = append(d.logs, driver.LogEntry{
 			UnixMillis: int64(e.Timestamp.Time().UnixMilli()),
-			Level:      level,
+			Level:      consoleLevel(e.Type),
 			Tag:        "console",
 			Message:    strings.Join(parts, " "),
 		})
@@ -712,6 +708,22 @@ func (d *Driver) Metrics(ctx context.Context, _ string) (driver.Metrics, error)
 	}, nil
 }
 
+// consoleLevel places a console call on driver.LogEntry's logcat scale. The
+// verbs a spec acts on are all named here; the rest are info rather than "E"
+// because promoting them would convict an app of an error it never logged.
+func consoleLevel(apiType runtime.APIType) string {
+	switch apiType {
+	case runtime.APITypeError, runtime.APITypeAssert:
+		return "E"
+	case runtime.APITypeWarning:
+		return "W"
+	case runtime.APITypeDebug:
+		return "D"
+	default:
+		return "I"
+	}
+}
+
 // meetsLevel keeps an entry whose level the scale cannot rank. Ranking an
 // unknown level below every threshold drops it, and a dropped entry is
 // indistinguishable from a quiet app: the caller sees silence and reports it as

internal/driver/chrome/logs_test.go

@@ -1,6 +1,33 @@
 package chrome
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/chromedp/cdproto/runtime"
+)
+
+// Every console verb has to land on the logcat scale driver.LogEntry declares:
+// the runner fetches at "E" and the default properties count entries whose
+// level equals "E", so a level spelled any other way is an error the spec never
+// sees. A verb with no mapping is info, which is honest about severity without
+// fabricating an error the page never logged.
+func TestConsoleLevel(t *testing.T) {
+	cases := map[runtime.APIType]string{
+		runtime.APITypeError:          "E",
+		runtime.APITypeAssert:         "E",
+		runtime.APITypeWarning:        "W",
+		runtime.APITypeDebug:          "D",
+		runtime.APITypeLog:            "I",
+		runtime.APITypeInfo:           "I",
+		runtime.APITypeTable:          "I",
+		runtime.APIType("countReset"): "I",
+	}
+	for apiType, want := range cases {
+		if got := consoleLevel(apiType); got != want {
+			t.Errorf("consoleLevel(%q) = %q, want %q", apiType, got, want)
+		}
+	}
+}
 
 // A level the scale does not name is unknown, not verbose. Ranking it below
 // every threshold is what silently emptied the web log channel: the entries