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, 19 deletions

diff --git a/internal/bible/convert_test.go b/internal/bible/convert_test.go
deleted file mode 100644
index 6f16c89..0000000
--- a/internal/bible/convert_test.go
+++ /dev/null
@@ -1,19 +0,0 @@
-package bible
-
-import "testing"
-
-func TestToEnglishRef(t *testing.T) {
-	cases := []struct{ in, system, want string }{
-		{"Mt 7, 1-5", "vulgate", "Mat 7:1-5"},
-		{"J 20, 1. 11-18", "vulgate", "John 20:1,11-18"},
-		{"por. J 20, 11", "vulgate", "John 20:11"},
-		{"Ps 63 (62), 2. 3-4. 5-6. 8-9 (R.: por. 2ab)", "vulgate", "Psalms 62:2,3-4,5-6,8-9"},
-		{"Ps 63 (62), 2. 3-4. 5-6. 8-9 (R.: por. 2ab)", "drb", "Psalms 63:1,2-3,4-5,7-8"},
-	}
-	for _, c := range cases {
-		got, err := ToEnglishRef(c.in, c.system)
-		if err != nil || got != c.want {
-			t.Errorf("ToEnglishRef(%q,%q)=%q,%v want %q", c.in, c.system, got, err, c.want)
-		}
-	}
-}