test(bible): skip corpus-dependent tests when optional corpora aren't embedded

Since 51c0f4e split the corpora (only vul embedded by default; wuj/drb/grb
behind -tags fullbible), `go test ./...` on the default build was red across six
packages -- every failure was a test assuming an optional corpus is present.

Guard those assertions with a skip keyed on bible.Meta(code), so they run under
-tags fullbible and skip -- not fail -- on the default vul-only build. Mixed
tests are split into subtests so the always-embedded vul assertions and pure
logic (pl->vul fallback, explicit passthrough, bt-rejection, i18n labels) keep
running on both builds. Test-only change; no product code or corpora touched.

- internal/bible: TestVerses, TestLookup, TestCorpusBooks, TestChapters,
  TestGrbNoApparatusMarkers, TestCrossChapterRange* (requireCorpus helper).
- internal/cli, config, render, tui, web: the same pattern for their
  corpus-dependent tests.
- Fixes an index-out-of-range panic in internal/tui's reader tests that was
  aborting the package binary and masking 3 further corpus-absence failures
  (TestReaderBookmarkFlow, TestReaderChapterJump, TestReaderRemembersPlace).

Verified: `go test ./...` and `go test -tags fullbible ./...` both green (0 FAIL);
guards active only on the default build (29 skips vs 1 unrelated pre-existing);
gofmt and go vet clean.

1 files changed, 2 insertions, 0 deletions

diff --git a/internal/bible/crosschapter_test.go b/internal/bible/crosschapter_test.go
index 7fb61eb..20074fb 100644
--- a/internal/bible/crosschapter_test.go
+++ b/internal/bible/crosschapter_test.go
@@ -8,6 +8,7 @@ import "testing"
 // both chapters via Lookup, and format back to the clean "N:M-P:Q" form via
 // FormatRef (no sentinel, no mangled chapter).
 func TestCrossChapterRanges(t *testing.T) {
+	requireCorpus(t, "drb")
 	tbl, err := LoadBookTable(nil)
 	if err != nil {
 		t.Fatal(err)
@@ -90,6 +91,7 @@ func TestCrossChapterRanges(t *testing.T) {
 // "Malachi 1:14-2:2,8-10" (Ordinary Sunday 31 A): a cross-chapter range
 // followed by a plain verse group in the new (second) chapter.
 func TestCrossChapterRangeWithTrailingGroup(t *testing.T) {
+	requireCorpus(t, "drb")
 	tbl, err := LoadBookTable(nil)
 	if err != nil {
 		t.Fatal(err)