feat: this session's errors in the status pane, newest first

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/app/app_test.go

@@ -1300,3 +1300,25 @@ func TestExpiringInStatus(t *testing.T) {
 		t.Errorf("enter went to %s/%s\n%s", v, o, d.screen())
 	}
 }
+
+func TestErrorLog(t *testing.T) {
+	t.Parallel()
+	d := newDriverOpts(t, Options{}, fake.Azure(0))
+	d.keys("2", "j", "j", "3") // kv-restricted: its secrets can't be listed
+	d.m.flash = flash{text: "copy failed: no clipboard", isErr: true}
+	d.send(nil)
+	d.send(nil) // still showing: logged once
+	d.keys("0")
+	scr := d.screen()
+	if !strings.Contains(scr, "errors") || !strings.Contains(scr, "copy failed: no clipboard") || !strings.Contains(scr, "kv-restricted: 403 Forbidden") {
+		t.Errorf("errors not listed:\n%s", scr)
+	}
+	if n := len(d.m.errLog); n != 2 || !strings.HasPrefix(d.m.errLog[0].text, "copy failed") {
+		t.Errorf("log %+v", d.m.errLog)
+	}
+	d.m.logErr("403 Forbidden: again") // a new one, and an old one again: on top
+	d.m.logErr(d.m.errLog[2].text)
+	if len(d.m.errLog) != 3 || d.m.errLog[0].text == "403 Forbidden: again" {
+		t.Errorf("log %+v", d.m.errLog)
+	}
+}