help: refresh -h/--help for lectio, lectio-ui, lectio-web

The help text predated this session's changes. Update all three binaries:

- Taglines: drop "(Polish + 4 versions)" -> "offline ... daily readings (OF + EF)".
- Versions: state that only the Latin Vulgate is built in; wuj/grb/drb are
  optional (make build-full, or drop <code>.tsv/.ini into the corpora dir); a
  missing version renders "(not in <code>)".
- --ui-lang: now any code (en, pl, ...), not just pl|en; note names/<code>.ini,
  ui/<code>.ini, custom calendars and the sanctorale override.
- lectio-ui: drop the removed "bt" version and the no-op -o/--offline flag from
  the help (the tool is fully offline; --offline only ever dropped bt).
- lectio-web: drop -o/--offline; add a one-line description of what it serves.

No behaviour change; full suite green.

1 files changed, 6 insertions, 2 deletions

diff --git a/cmd/lectio-web/main.go b/cmd/lectio-web/main.go
index fb7f185..f8d90b1 100644
--- a/cmd/lectio-web/main.go
+++ b/cmd/lectio-web/main.go
@@ -15,18 +15,22 @@ import (
 	"github.com/lukaszkasprzak/lectio/internal/web"
 )
 
-const helpText = `lectio-web — browser daily liturgy reader (Polish + 4 versions)
+const helpText = `lectio-web — browser offline daily-readings reader (OF + EF)
 
 Usage:
   lectio-web [flags]
 
 Flags:
   -p, --port N            port (overrides web_port; 0 = auto)
-  -o, --offline            cache/sigla only, no network
   -l, --lectionary WHICH   new|trad (trad -> traditional)
   -v, --version            print the version and exit
   -h, --help               this help
 
+Serves a local page (default: http://localhost:1099) with the day's readings,
+version compare, a Bible reader and bookmarks. Everything renders offline.
+Versions and display are set in the page's settings; vul (Latin Vulgate) is
+built in, wuj/grb/drb are optional (make build-full, or ~/.config/lectio/corpora/).
+
 Flags override config. Exit codes: 0 ok, 1 runtime error, 2 usage error.
 `