lectio-ui reader: go-to-chapter jump (c)

Inside a book, 'c' opens a centered prompt showing the book's chapter
range (e.g. "1-21: ") and accepts a chapter number to jump straight there,
instead of scrolling (handy for Psalm 119 etc). Digits only, backspace
edits, Enter clamps to the valid range and opens that chapter at its top,
Esc cancels. New modeChapterJump + updateChapterJump/jumpToChapter/
viewChapterJump; i18n ReaderJumpChapter/ReaderJumpChapterKeys (en/pl) and
'c' added to the reading keybar. Only offered when the book has >1 chapter.

1 files changed, 145 insertions, 138 deletions

diff --git a/internal/i18n/i18n.go b/internal/i18n/i18n.go
index 16d489a..36aa288 100644
--- a/internal/i18n/i18n.go
+++ b/internal/i18n/i18n.go
@@ -34,6 +34,9 @@ type UI struct {
 	ReaderMarkPrompt, ReaderBookmarksTitle, ReaderBookmarksKeys, ReaderNoBookmarks string
 	ReaderMarkVerseKeys, ReaderConfirmDelete, ReaderConfirmKeys                    string
 	ReaderMarkNote, ReaderMarkTags, ReaderMarkHelp                                 string
+	// Reader go-to-chapter prompt: the dialog label (rendered after the book
+	// name) and its enter/esc help line.
+	ReaderJumpChapter, ReaderJumpChapterKeys string
 
 	// CLI banner label words and connective: the banner is
 	// "<word> <BannerConnective> <date>" (e.g. "Gospel for 2026-07-22" /
@@ -116,75 +119,77 @@ var enUI = UI{
 		"aklamacja":         "Acclamation",
 		"ewangelia":         "Gospel",
 	},
-	FooterKeys:           "tab/⇧tab version  ←/→ day  d date  j/k scroll  space/b page  g/G top/bottom  r refresh  q quit",
-	Loading:              "loading…",
-	NoReadingsFor:        "no readings for ",
-	ErrorPrefix:          "error: ",
-	ErrorHint:            "change date (←/→) or refresh (r)",
-	JumpPrompt:           "go to date (YYYY-MM-DD)",
-	ReaderTitle:          "reader — pick a book",
-	ReaderPickKeys:       "type to filter  ↑/↓ move  enter open  esc quit",
-	ReaderReadKeys:       "n/p chapter  tab version  j/k scroll  m mark  b bookmarks  esc books  q quit",
-	ReaderNoText:         "(no text in this version)",
-	ReaderNoMatch:        "(no matching books)",
-	ReaderMarkPrompt:     "note (enter to save, esc to cancel)",
-	ReaderBookmarksTitle: "bookmarks",
-	ReaderBookmarksKeys:  "j/k move  enter open  d delete  esc back  q quit",
-	ReaderNoBookmarks:    "no bookmarks yet — press m while reading",
-	ReaderMarkVerseKeys:  "↑/↓ pick verse  enter add note  esc cancel",
-	ReaderConfirmDelete:  "Delete this bookmark?",
-	ReaderConfirmKeys:    "y = delete    n = cancel",
-	ReaderMarkNote:       "note",
-	ReaderMarkTags:       "tags",
-	ReaderMarkHelp:       "enter save · tab switch field · esc cancel",
-	BannerGospel:         "Gospel",
-	BannerReadings:       "Readings",
-	BannerConnective:     "for",
-	Months:               [12]string{"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"},
-	Lectionary:           "lectionary",
-	OptModern:            "modern",
-	OptTraditional:       "traditional",
-	Parts:                "parts",
-	OptGospel:            "Gospel",
-	OptAll:               "all parts",
-	Layout:               "layout",
-	OptHorizontal:        "horizontal",
-	OptColumns:           "columns",
-	OptInterlinear:       "interlinear",
-	Theme:                "theme",
-	Mono:                 "mono",
-	NoInterlinearVerses:  "(no verses to align)",
-	NavReader:            "reader",
-	WebBook:              "book",
-	WebChapter:           "chapter",
-	NavHome:              "home",
-	NavSettings:          "settings",
-	NavBookmarks:         "bookmarks",
-	WebVerseOptional:     "verse (optional)",
-	WebTagsPlaceholder:   "tags, comma-separated",
-	WebAddBookmark:       "bookmark",
-	WebAllTags:           "all",
-	WebNoBookmarks:       "No bookmarks yet.",
-	WebDelete:            "delete",
-	WebSaved:             "Saved.",
-	WebTradLang:          "traditional language",
-	WebUILang:            "UI language",
-	WebSiglaStyle:        "sigla style",
-	WebDefaultVersion:    "default version",
-	WebVersions:          "versions",
-	WebWebVersions:       "web versions",
-	WebOffline:           "offline",
-	WebWidth:             "width",
-	WebPort:              "web port",
-	WebPager:             "pager",
-	WebSave:              "Save",
-	Export:               "download",
-	Calendar:             "month calendar",
-	NoReadingsDay:        "no readings for this day",
-	NoVersion:            "(not in %s)",
-	NoVersionPartial:     "(not in %s: %s)",
-	NoReference:          "(no reference)",
-	NoReferenceErr:       "(no reference: %v)",
+	FooterKeys:            "tab/⇧tab version  ←/→ day  d date  j/k scroll  space/b page  g/G top/bottom  r refresh  q quit",
+	Loading:               "loading…",
+	NoReadingsFor:         "no readings for ",
+	ErrorPrefix:           "error: ",
+	ErrorHint:             "change date (←/→) or refresh (r)",
+	JumpPrompt:            "go to date (YYYY-MM-DD)",
+	ReaderTitle:           "reader — pick a book",
+	ReaderPickKeys:        "type to filter  ↑/↓ move  enter open  esc quit",
+	ReaderReadKeys:        "n/p chapter  c go-to  tab version  j/k scroll  m mark  b bookmarks  esc books  q quit",
+	ReaderNoText:          "(no text in this version)",
+	ReaderNoMatch:         "(no matching books)",
+	ReaderMarkPrompt:      "note (enter to save, esc to cancel)",
+	ReaderBookmarksTitle:  "bookmarks",
+	ReaderBookmarksKeys:   "j/k move  enter open  d delete  esc back  q quit",
+	ReaderNoBookmarks:     "no bookmarks yet — press m while reading",
+	ReaderMarkVerseKeys:   "↑/↓ pick verse  enter add note  esc cancel",
+	ReaderConfirmDelete:   "Delete this bookmark?",
+	ReaderConfirmKeys:     "y = delete    n = cancel",
+	ReaderMarkNote:        "note",
+	ReaderMarkTags:        "tags",
+	ReaderMarkHelp:        "enter save · tab switch field · esc cancel",
+	ReaderJumpChapter:     "go to chapter",
+	ReaderJumpChapterKeys: "enter go · esc cancel",
+	BannerGospel:          "Gospel",
+	BannerReadings:        "Readings",
+	BannerConnective:      "for",
+	Months:                [12]string{"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"},
+	Lectionary:            "lectionary",
+	OptModern:             "modern",
+	OptTraditional:        "traditional",
+	Parts:                 "parts",
+	OptGospel:             "Gospel",
+	OptAll:                "all parts",
+	Layout:                "layout",
+	OptHorizontal:         "horizontal",
+	OptColumns:            "columns",
+	OptInterlinear:        "interlinear",
+	Theme:                 "theme",
+	Mono:                  "mono",
+	NoInterlinearVerses:   "(no verses to align)",
+	NavReader:             "reader",
+	WebBook:               "book",
+	WebChapter:            "chapter",
+	NavHome:               "home",
+	NavSettings:           "settings",
+	NavBookmarks:          "bookmarks",
+	WebVerseOptional:      "verse (optional)",
+	WebTagsPlaceholder:    "tags, comma-separated",
+	WebAddBookmark:        "bookmark",
+	WebAllTags:            "all",
+	WebNoBookmarks:        "No bookmarks yet.",
+	WebDelete:             "delete",
+	WebSaved:              "Saved.",
+	WebTradLang:           "traditional language",
+	WebUILang:             "UI language",
+	WebSiglaStyle:         "sigla style",
+	WebDefaultVersion:     "default version",
+	WebVersions:           "versions",
+	WebWebVersions:        "web versions",
+	WebOffline:            "offline",
+	WebWidth:              "width",
+	WebPort:               "web port",
+	WebPager:              "pager",
+	WebSave:               "Save",
+	Export:                "download",
+	Calendar:              "month calendar",
+	NoReadingsDay:         "no readings for this day",
+	NoVersion:             "(not in %s)",
+	NoVersionPartial:      "(not in %s: %s)",
+	NoReference:           "(no reference)",
+	NoReferenceErr:        "(no reference: %v)",
 }
 
 var plUI = UI{
@@ -202,73 +207,75 @@ var plUI = UI{
 		"aklamacja":         "Aklamacja",
 		"ewangelia":         "Ewangelia",
 	},
-	FooterKeys:           "tab/⇧tab wersja  ←/→ dzień  d data  j/k przewiń  spacja/b strona  g/G góra/dół  r odśwież  q wyjście",
-	Loading:              "ładowanie…",
-	NoReadingsFor:        "brak czytań na ",
-	ErrorPrefix:          "błąd: ",
-	ErrorHint:            "zmień datę (←/→) lub odśwież (r)",
-	JumpPrompt:           "przejdź do daty (RRRR-MM-DD)",
-	ReaderTitle:          "czytnik — wybierz księgę",
-	ReaderPickKeys:       "wpisz, by filtrować  ↑/↓ ruch  enter otwórz  esc wyjście",
-	ReaderReadKeys:       "n/p rozdział  tab wersja  j/k przewiń  m zakładka  b zakładki  esc księgi  q wyjście",
-	ReaderNoText:         "(brak tekstu w tej wersji)",
-	ReaderNoMatch:        "(brak pasujących ksiąg)",
-	ReaderMarkPrompt:     "notatka (enter zapisz, esc anuluj)",
-	ReaderBookmarksTitle: "zakładki",
-	ReaderBookmarksKeys:  "j/k ruch  enter otwórz  d usuń  esc wróć  q wyjście",
-	ReaderNoBookmarks:    "brak zakładek — naciśnij m podczas czytania",
-	ReaderMarkVerseKeys:  "↑/↓ wybierz werset  enter notatka  esc anuluj",
-	ReaderConfirmDelete:  "Usunąć zakładkę?",
-	ReaderConfirmKeys:    "y = usuń    n = anuluj",
-	ReaderMarkNote:       "notatka",
-	ReaderMarkTags:       "tagi",
-	ReaderMarkHelp:       "enter zapisz · tab pole · esc anuluj",
-	BannerGospel:         "Ewangelia",
-	BannerReadings:       "Czytania",
-	BannerConnective:     "na",
-	Months:               [12]string{"Styczeń", "Luty", "Marzec", "Kwiecień", "Maj", "Czerwiec", "Lipiec", "Sierpień", "Wrzesień", "Październik", "Listopad", "Grudzień"},
-	Lectionary:           "lekcjonarz",
-	OptModern:            "nowy",
-	OptTraditional:       "tradycyjny",
-	Parts:                "zakres",
-	OptGospel:            "Ewangelia",
-	OptAll:               "wszystkie części",
-	Layout:               "układ",
-	OptHorizontal:        "poziomo",
-	OptColumns:           "kolumny",
-	OptInterlinear:       "interlinearnie",
-	Theme:                "motyw",
-	Mono:                 "mono",
-	NoInterlinearVerses:  "(brak wersetów do zestawienia interlinearnego)",
-	NavReader:            "czytnik",
-	WebBook:              "księga",
-	WebChapter:           "rozdział",
-	NavHome:              "strona główna",
-	NavSettings:          "ustawienia",
-	NavBookmarks:         "zakładki",
-	WebVerseOptional:     "werset (opcjonalnie)",
-	WebTagsPlaceholder:   "tagi, oddzielone przecinkami",
-	WebAddBookmark:       "zakładka",
-	WebAllTags:           "wszystkie",
-	WebNoBookmarks:       "Brak zakładek.",
-	WebDelete:            "usuń",
-	WebSaved:             "Zapisano.",
-	WebTradLang:          "język tradycyjny",
-	WebUILang:            "język interfejsu",
-	WebSiglaStyle:        "styl sigli",
-	WebDefaultVersion:    "wersja domyślna",
-	WebVersions:          "wersje",
-	WebWebVersions:       "wersje web",
-	WebOffline:           "offline",
-	WebWidth:             "szerokość",
-	WebPort:              "port web",
-	WebPager:             "pager",
-	WebSave:              "Zapisz",
-	Export:               "pobierz",
-	Calendar:             "kalendarz miesiąca",
-	NoReadingsDay:        "brak czytań na ten dzień",
-	NoVersion:            "(brak w „%s”)",
-	NoVersionPartial:     "(brak w „%s”: %s)",
-	NoReference:          "(brak odwołania)",
-	NoReferenceErr:       "(brak odwołania: %w)",
+	FooterKeys:            "tab/⇧tab wersja  ←/→ dzień  d data  j/k przewiń  spacja/b strona  g/G góra/dół  r odśwież  q wyjście",
+	Loading:               "ładowanie…",
+	NoReadingsFor:         "brak czytań na ",
+	ErrorPrefix:           "błąd: ",
+	ErrorHint:             "zmień datę (←/→) lub odśwież (r)",
+	JumpPrompt:            "przejdź do daty (RRRR-MM-DD)",
+	ReaderTitle:           "czytnik — wybierz księgę",
+	ReaderPickKeys:        "wpisz, by filtrować  ↑/↓ ruch  enter otwórz  esc wyjście",
+	ReaderReadKeys:        "n/p rozdział  c skok  tab wersja  j/k przewiń  m zakładka  b zakładki  esc księgi  q wyjście",
+	ReaderNoText:          "(brak tekstu w tej wersji)",
+	ReaderNoMatch:         "(brak pasujących ksiąg)",
+	ReaderMarkPrompt:      "notatka (enter zapisz, esc anuluj)",
+	ReaderBookmarksTitle:  "zakładki",
+	ReaderBookmarksKeys:   "j/k ruch  enter otwórz  d usuń  esc wróć  q wyjście",
+	ReaderNoBookmarks:     "brak zakładek — naciśnij m podczas czytania",
+	ReaderMarkVerseKeys:   "↑/↓ wybierz werset  enter notatka  esc anuluj",
+	ReaderConfirmDelete:   "Usunąć zakładkę?",
+	ReaderConfirmKeys:     "y = usuń    n = anuluj",
+	ReaderMarkNote:        "notatka",
+	ReaderMarkTags:        "tagi",
+	ReaderMarkHelp:        "enter zapisz · tab pole · esc anuluj",
+	ReaderJumpChapter:     "przejdź do rozdziału",
+	ReaderJumpChapterKeys: "enter przejdź · esc anuluj",
+	BannerGospel:          "Ewangelia",
+	BannerReadings:        "Czytania",
+	BannerConnective:      "na",
+	Months:                [12]string{"Styczeń", "Luty", "Marzec", "Kwiecień", "Maj", "Czerwiec", "Lipiec", "Sierpień", "Wrzesień", "Październik", "Listopad", "Grudzień"},
+	Lectionary:            "lekcjonarz",
+	OptModern:             "nowy",
+	OptTraditional:        "tradycyjny",
+	Parts:                 "zakres",
+	OptGospel:             "Ewangelia",
+	OptAll:                "wszystkie części",
+	Layout:                "układ",
+	OptHorizontal:         "poziomo",
+	OptColumns:            "kolumny",
+	OptInterlinear:        "interlinearnie",
+	Theme:                 "motyw",
+	Mono:                  "mono",
+	NoInterlinearVerses:   "(brak wersetów do zestawienia interlinearnego)",
+	NavReader:             "czytnik",
+	WebBook:               "księga",
+	WebChapter:            "rozdział",
+	NavHome:               "strona główna",
+	NavSettings:           "ustawienia",
+	NavBookmarks:          "zakładki",
+	WebVerseOptional:      "werset (opcjonalnie)",
+	WebTagsPlaceholder:    "tagi, oddzielone przecinkami",
+	WebAddBookmark:        "zakładka",
+	WebAllTags:            "wszystkie",
+	WebNoBookmarks:        "Brak zakładek.",
+	WebDelete:             "usuń",
+	WebSaved:              "Zapisano.",
+	WebTradLang:           "język tradycyjny",
+	WebUILang:             "język interfejsu",
+	WebSiglaStyle:         "styl sigli",
+	WebDefaultVersion:     "wersja domyślna",
+	WebVersions:           "wersje",
+	WebWebVersions:        "wersje web",
+	WebOffline:            "offline",
+	WebWidth:              "szerokość",
+	WebPort:               "port web",
+	WebPager:              "pager",
+	WebSave:               "Zapisz",
+	Export:                "pobierz",
+	Calendar:              "kalendarz miesiąca",
+	NoReadingsDay:         "brak czytań na ten dzień",
+	NoVersion:             "(brak w „%s”)",
+	NoVersionPartial:      "(brak w „%s”: %s)",
+	NoReference:           "(brak odwołania)",
+	NoReferenceErr:        "(brak odwołania: %w)",
 }