test: share the first-page and clock helpers

writeFirstPage answers paged listings in app and services tests,
testNow replaces the copied clock, withoutANSI the second color
stripper, and the single-entry table test becomes a plain test.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/helpers_test.go

@@ -19,6 +19,7 @@ import (
 	"regexp"
 	"strings"
 	"testing"
+	"time"
 
 	"gitea.dev/tea/internal/auth"
 	"gitea.dev/tea/internal/clierr"
@@ -336,3 +337,14 @@ func plainOutput(t *testing.T, deps Dependencies) {
 		return nil
 	}))
 }
+
+// writeFirstPage answers the first page of a listing with page and every later page with [].
+func writeFirstPage(w http.ResponseWriter, r *http.Request, page string) {
+	if r.URL.Query().Get("page") != "1" {
+		page = `[]`
+	}
+	_, _ = w.Write([]byte(page))
+}
+
+// testNow is the clock of tests that show relative times.
+var testNow = time.Date(2026, 10, 11, 20, 0, 0, 0, time.UTC)