replay ui fix (#56)

* refactor: rename inspect to replay across the codebase

Renames inspect-ui/ to replay-ui/, internal/inspect/ to internal/replay/,
the CLI subcommand from `sanderling inspect` to `sanderling replay`, and
updates all references in docs, Makefile, README, and Go comments.

* feat(replay-ui): show spec filename with full path on hover

RunList and RunDetail now render the basename of spec_path (e.g.
login.spec.ts) with the full path available as a title tooltip.

cmd/sanderling/replay_test.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"strings"
+	"testing"
+)
+
+func TestParseReplayArgs_Defaults(t *testing.T) {
+	options, err := parseReplayArgs(nil, io.Discard)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if options.port != 0 || options.noOpen || options.dev || options.directory != "" {
+		t.Errorf("unexpected defaults: %+v", options)
+	}
+}
+
+func TestParseReplayArgs_AllFlags(t *testing.T) {
+	options, err := parseReplayArgs([]string{"--port", "9090", "--no-open", "--dev", "/tmp/runs"}, io.Discard)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if options.port != 9090 || !options.noOpen || !options.dev || options.directory != "/tmp/runs" {
+		t.Errorf("unexpected options: %+v", options)
+	}
+}
+
+func TestParseReplayArgs_RejectsTooManyPositional(t *testing.T) {
+	_, err := parseReplayArgs([]string{"a", "b"}, io.Discard)
+	if err == nil || !strings.Contains(err.Error(), "at most one") {
+		t.Fatalf("expected too-many-args error, got %v", err)
+	}
+}
+
+func TestRun_HelpListsReplayCommand(t *testing.T) {
+	var stdout bytes.Buffer
+	if err := run([]string{"sanderling"}, &stdout, io.Discard); err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(stdout.String(), "replay") {
+		t.Errorf("usage missing replay command: %q", stdout.String())
+	}
+}