i18n: ui_language config (default en) for UI chrome across cli/tui/web; version labels localised

2 files changed, 66 insertions, 10 deletions

diff --git a/internal/tui/tui.go b/internal/tui/tui.go
index 1e3b948..bcfb3c1 100644
--- a/internal/tui/tui.go
+++ b/internal/tui/tui.go
@@ -13,6 +13,7 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 
 	"github.com/lukaszkasprzak/lectio/internal/config"
+	"github.com/lukaszkasprzak/lectio/internal/i18n"
 	"github.com/lukaszkasprzak/lectio/internal/liturgy"
 	"github.com/lukaszkasprzak/lectio/internal/readings"
 	"github.com/lukaszkasprzak/lectio/internal/render"
@@ -42,8 +43,6 @@ type errMsg struct {
 	err error
 }
 
-const footerKeys = "tab/⇧tab wersja  ←/→ dzień  j/k przewiń  spacja/b strona  g/G góra/dół  r odśwież  q wyjście"
-
 // New builds the initial model: cfg.Offline drops "pl" from the version
 // list (render.OfflineVersions), the active version starts at
 // cfg.DefaultVersion (falling back to the first version if not found, or
@@ -256,7 +255,7 @@ func (m Model) View() string {
 	}
 
 	header := headerStyle.Width(w).Render(m.headerText())
-	footer := footerStyle.Width(w).Render(footerKeys)
+	footer := footerStyle.Width(w).Render(i18n.Get(m.cfg.UILanguage).FooterKeys)
 
 	bodyLines := m.bodyLines(innerW)
 
@@ -276,7 +275,7 @@ func (m Model) View() string {
 func (m Model) headerText() string {
 	label := m.version()
 	if len(m.sections) > 0 {
-		if l, _ := render.GatherVersion(m.version(), m.sections[0], m.cfg.Lectionary); l != "" {
+		if l, _ := render.GatherVersion(m.version(), m.sections[0], m.cfg.Lectionary, m.cfg.UILanguage); l != "" {
 			label = l
 		}
 	}
@@ -287,17 +286,19 @@ func (m Model) headerText() string {
 // through: a loading/error/empty notice, or each section's heading +
 // render.GatherVersion blocks for the active version.
 func (m Model) bodyLines(w int) []string {
+	ui := i18n.Get(m.cfg.UILanguage)
+
 	switch {
 	case m.err != nil:
 		return []string{
-			errStyle.Render("błąd: " + m.err.Error()),
+			errStyle.Render(ui.ErrorPrefix + m.err.Error()),
 			"",
-			citationStyle.Render("zmień datę (←/→) lub odśwież (r)"),
+			citationStyle.Render(ui.ErrorHint),
 		}
 	case m.loading:
-		return []string{citationStyle.Render("ładowanie…")}
+		return []string{citationStyle.Render(ui.Loading)}
 	case len(m.sections) == 0:
-		return []string{citationStyle.Render("brak czytań na " + m.date)}
+		return []string{citationStyle.Render(ui.NoReadingsFor + m.date)}
 	}
 
 	ver := m.version()
@@ -306,13 +307,14 @@ func (m Model) bodyLines(w int) []string {
 		if i > 0 {
 			lines = append(lines, "")
 		}
-		lines = append(lines, headingStyle.Render(sec.Heading))
+		heading := render.LocalizeHeading(sec.Heading, sec.PartID, m.cfg.UILanguage)
+		lines = append(lines, headingStyle.Render(heading))
 		if sec.Subtitle != "" {
 			lines = append(lines, citationStyle.Render(sec.Subtitle))
 		}
 		lines = append(lines, "")
 
-		_, blocks := render.GatherVersion(ver, sec, m.cfg.Lectionary)
+		_, blocks := render.GatherVersion(ver, sec, m.cfg.Lectionary, m.cfg.UILanguage)
 		isPsalm := sec.PartID == "psalm"
 		for bi, b := range blocks {
 			refrain := isPsalm && bi == 0
diff --git a/internal/tui/tui_test.go b/internal/tui/tui_test.go
index 2aa7b84..baa5c05 100644
--- a/internal/tui/tui_test.go
+++ b/internal/tui/tui_test.go
@@ -1,9 +1,11 @@
 package tui
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/lukaszkasprzak/lectio/internal/config"
+	"github.com/lukaszkasprzak/lectio/internal/liturgy"
 )
 
 func TestVersionCycle(t *testing.T) {
@@ -29,3 +31,55 @@ func TestOfflineDropsPL(t *testing.T) {
 		}
 	}
 }
+
+// TestBodyLinesLocalisesMessages checks that the loading/no-readings/error
+// messages follow cfg.UILanguage.
+func TestBodyLinesLocalisesMessages(t *testing.T) {
+	en := Model{cfg: config.Config{UILanguage: "en"}, loading: true}
+	if lines := en.bodyLines(80); len(lines) == 0 || !strings.Contains(lines[0], "loading") {
+		t.Errorf("en loading bodyLines = %v, want it to contain %q", lines, "loading")
+	}
+
+	pl := Model{cfg: config.Config{UILanguage: "pl"}, loading: true}
+	if lines := pl.bodyLines(80); len(lines) == 0 || !strings.Contains(lines[0], "ładowanie") {
+		t.Errorf("pl loading bodyLines = %v, want it to contain %q", lines, "ładowanie")
+	}
+
+	enEmpty := Model{cfg: config.Config{UILanguage: "en"}, date: "2026-07-22"}
+	if lines := enEmpty.bodyLines(80); len(lines) == 0 || !strings.Contains(lines[0], "no readings for") {
+		t.Errorf("en no-readings bodyLines = %v, want it to contain %q", lines, "no readings for")
+	}
+}
+
+// TestBodyLinesLocalisesHeading checks that a modern-lectionary section
+// heading's label word follows cfg.UILanguage while the citation stays
+// exactly as scraped (render.LocalizeHeading, brief §3b).
+func TestBodyLinesLocalisesHeading(t *testing.T) {
+	sec := liturgy.Section{Heading: "Ewangelia (J 20, 1. 11-18)", PartID: "ewangelia"}
+
+	en := Model{cfg: config.Config{UILanguage: "en", Lectionary: "new"}, sections: []liturgy.Section{sec}}
+	body := strings.Join(en.bodyLines(80), "\n")
+	if !strings.Contains(body, "Gospel (J 20, 1. 11-18)") {
+		t.Errorf("en bodyLines missing localised heading: %q", body)
+	}
+
+	pl := Model{cfg: config.Config{UILanguage: "pl", Lectionary: "new"}, sections: []liturgy.Section{sec}}
+	body = strings.Join(pl.bodyLines(80), "\n")
+	if !strings.Contains(body, "Ewangelia (J 20, 1. 11-18)") {
+		t.Errorf("pl bodyLines missing unchanged heading: %q", body)
+	}
+}
+
+// TestFooterKeysLocalised checks the footer keybar text follows
+// cfg.UILanguage.
+func TestFooterKeysLocalised(t *testing.T) {
+	en := Model{cfg: config.Config{UILanguage: "en"}, date: "2026-07-22"}
+	if out := en.View(); !strings.Contains(out, "q quit") {
+		t.Errorf("en View() footer missing %q: %q", "q quit", out)
+	}
+
+	pl := Model{cfg: config.Config{UILanguage: "pl"}, date: "2026-07-22"}
+	if out := pl.View(); !strings.Contains(out, "q wyjście") {
+		t.Errorf("pl View() footer missing %q: %q", "q wyjście", out)
+	}
+}