refactor: remove the niedziela/missalemeum scrapers, bt, traditional_lang

The daily view now computes entirely offline (previous commit), so retire the
network path and everything that served it:

- Delete internal/tradlit (missalemeum) and the niedziela scraper from
  internal/liturgy (fetch/store/parse + fixtures); keep Section, DayInfo and
  ExtractCitation.
- Remove the "bt" version everywhere (render gatherBT + branches, config,
  i18n, web form, TUI) and bible.ToEnglishRef (Polish citation converter).
  A legacy config carrying "bt" migrates to "wuj" on load (config.migrateBT).
- Remove the traditional_lang config field and the -g/--lang flag from all
  three binaries.
- Drop the now-dead flags -R/--refresh, -o/--offline, -u/--update,
  -C/--clean and the harvest/clean commands.
- New defaults: versions = wuj,vul,grb,drb; default_version = vul.

Update the README (offline-by-design, no harvest/update), help text, and
stale niedziela/bt doc comments. Tests updated for the offline reality;
go test ./... and go vet ./... are clean, all three binaries build and run
offline (OF + EF, compare, web).

1 files changed, 0 insertions, 86 deletions

diff --git a/internal/tradlit/parse_test.go b/internal/tradlit/parse_test.go
deleted file mode 100644
index 58cc66f..0000000
--- a/internal/tradlit/parse_test.go
+++ /dev/null
@@ -1,86 +0,0 @@
-package tradlit
-
-import (
-	"os"
-	"strings"
-	"testing"
-
-	"github.com/lukaszkasprzak/lectio/internal/liturgy"
-)
-
-func TestParse(t *testing.T) {
-	body, err := os.ReadFile("testdata/2026-07-22.json")
-	if err != nil {
-		t.Fatal(err)
-	}
-	secs, _, err := Parse(body)
-	if err != nil {
-		t.Fatal(err)
-	}
-	var gospel, epistle bool
-	for _, s := range secs {
-		if s.PartID == "evangelium" {
-			gospel = true
-			if s.Citation != "Luke 7:36-50" {
-				t.Errorf("gospel citation = %q", s.Citation)
-			}
-			if len(s.Paragraphs) == 0 {
-				t.Error("gospel has no vernacular text")
-			}
-		}
-		if s.PartID == "lectio" {
-			epistle = true
-		}
-	}
-	if !gospel || !epistle {
-		t.Errorf("missing parts: gospel=%v epistle=%v", gospel, epistle)
-	}
-}
-
-// TestParseDayInfo checks the traditional (missalemeum) day-info
-// extraction against the fixture's "info" object: Name from info.title,
-// Season from info.tempora, Colour from info.colors[0] ("w" -> "white").
-func TestParseDayInfo(t *testing.T) {
-	body, err := os.ReadFile("testdata/2026-07-22.json")
-	if err != nil {
-		t.Fatal(err)
-	}
-	_, info, err := Parse(body)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if info.Name != "St. Mary Magdalene" {
-		t.Errorf("Name = %q, want %q", info.Name, "St. Mary Magdalene")
-	}
-	if !strings.Contains(info.Season, "Pentecost") {
-		t.Errorf("Season = %q, want it to contain %q", info.Season, "Pentecost")
-	}
-	if info.Colour != "white" {
-		t.Errorf("Colour = %q, want %q", info.Colour, "white")
-	}
-}
-
-// TestParseDayInfoMissingInfo checks that a response with no (or empty)
-// info object yields a zero DayInfo rather than an error.
-func TestParseDayInfoMissingInfo(t *testing.T) {
-	_, info, err := Parse([]byte(`[{"sections":[]}]`))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if info != (liturgy.DayInfo{}) {
-		t.Errorf("info = %+v, want zero value for a response with no info object", info)
-	}
-}
-
-// TestParseDayInfoUnknownColourCode checks an unrecognised colour code maps
-// to "" rather than passing the raw code through.
-func TestParseDayInfoUnknownColourCode(t *testing.T) {
-	body := []byte(`[{"info":{"title":"Test","tempora":"","colors":["z"]},"sections":[]}]`)
-	_, info, err := Parse(body)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if info.Colour != "" {
-		t.Errorf("Colour = %q, want empty for unknown code %q", info.Colour, "z")
-	}
-}