web: horizontal/vertical/interlinear display modes + web_display config

Adds a display-layout option to lectio-web alongside the existing colour
themes:

- config: WebDisplay field (toml web_display), default "horizontal",
  normalized on load via the new exported config.NormalizeDisplay
  (unknown -> "horizontal", same lenient style as the other web_* fields).
- render: extracts the citation/ToEnglishRef resolution shared by
  GatherVersion into an unexported resolveRef helper (GatherVersion's
  signature/behavior unchanged) and adds GatherVerses(version, sec,
  lectionary) returning raw bible.Verse structs plus a versified flag, for
  column/interlinear alignment.
- web/render: RenderReadings gains a display parameter. "horizontal" is
  the original stacked layout, byte-for-byte the same code path as
  before. "vertical" reuses the same per-version column data in a
  .display-vertical/.vcol grid (the CLI compare view, browser-side).
  "interlinear" maps versions through render.OfflineVersions' pl->wuj
  substitution (pl has no verse numbers), gathers GatherVerses per
  version, and interleaves them by chapter:verse into .ilverse/.illine
  blocks (ordered union of keys, first versified version's order first).
- server: adds a display <select> to the top bar wired into the existing
  #controls HTMX form; a resolveQuery(cfg, r) helper replaces the
  duplicated date/lectionary/all/versions(+now display) resolution in
  indexHandler and readingsHandler.
- fold-in from the B2 review: indexHandler now populates indexData.Lookup
  via a shared renderLookup(ref, versions) helper (also used by
  lookupHandler), so a bookmarked "/?ref=...&v=..." link shows its
  lookup result instead of an empty pane.
- base.css: layout-only rules for the two new modes (no colours; themes
  stay colour-only).

go test ./..., go vet ./..., gofmt clean; go build ./cmd/lectio-web ok.

1 files changed, 31 insertions, 0 deletions

diff --git a/internal/render/render_test.go b/internal/render/render_test.go
index 87f9ed2..1b338a0 100644
--- a/internal/render/render_test.go
+++ b/internal/render/render_test.go
@@ -51,3 +51,34 @@ func TestOfflineVersions(t *testing.T) {
 		}
 	}
 }
+
+func TestGatherVersesBible(t *testing.T) {
+	sec := liturgy.Section{Heading: "Ewangelia (J 20, 1. 11-18)"}
+	label, verses, versified := GatherVerses("wuj", sec, "new")
+	if !strings.Contains(label, "Wujek") {
+		t.Errorf("label = %q", label)
+	}
+	if !versified {
+		t.Error("versified = false, want true for wuj with a resolvable citation")
+	}
+	if len(verses) == 0 {
+		t.Fatal("verses empty")
+	}
+	if verses[0].Chapter != 20 || verses[0].Verse != 1 || verses[0].Text == "" {
+		t.Errorf("verses[0] = %+v", verses[0])
+	}
+}
+
+func TestGatherVersesPL(t *testing.T) {
+	sec := liturgy.Section{
+		Heading:    "Psalm (Ps 1)",
+		Paragraphs: [][]string{{"stanza one"}},
+	}
+	_, verses, versified := GatherVerses("pl", sec, "new")
+	if versified {
+		t.Error("versified = true, want false for pl (paragraph text, no verse numbers)")
+	}
+	if verses != nil {
+		t.Errorf("verses = %+v, want nil for pl", verses)
+	}
+}