tui: aligned voucher detail, up/down between vouchers, list sorting

The detail pads every column by display width, blanks zero amounts and
shows row texts and a Summa line. Up/Down step to the previous/next
voucher in the list order; 's' cycles the list sort (number or date,
ascending or descending, saved in tui.conf). The list fetches all pages
of voucher.list instead of stopping at 200.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/clients/vlist.h b/clients/vlist.h
new file mode 100644
index 0000000..8324ade
--- /dev/null
+++ b/clients/vlist.h
@@ -0,0 +1,46 @@
+#ifndef BOKF_VLIST_H
+#define BOKF_VLIST_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* Voucher list ordering and stepping for the Verifikat view. Pure, so it is
+   unit-tested in tests/test_tui.c. */
+
+struct vlist_item {
+    int64_t id;
+    char series[16];
+    int64_t number;
+    char date[16];
+    char *desc; /* owned by the caller */
+    int attachments;
+};
+
+enum {
+    VSORT_NUMBER = 0, /* series, then number, ascending */
+    VSORT_NUMBER_DESC,
+    VSORT_DATE, /* date, then series and number, ascending */
+    VSORT_DATE_DESC,
+    VSORT_COUNT,
+};
+
+/* Sorts in place; ties fall back to the id so the order is stable. An
+   out-of-range mode sorts by number. */
+void vlist_sort(struct vlist_item *v, size_t n, int mode);
+
+/* Swedish label for the list title, e.g. "datum, fallande". */
+const char *vlist_sort_label(int mode);
+
+/* Config value ("number", "number-desc", "date", "date-desc") and back;
+   an unknown name gives VSORT_NUMBER. */
+const char *vlist_sort_name(int mode);
+int vlist_sort_parse(const char *name);
+
+/* Index of the item with this id, or -1. */
+int vlist_index(const struct vlist_item *v, size_t n, int64_t id);
+
+/* Index dir steps from idx, or -1 past either end or when idx is not in
+   the list. */
+int vlist_step(size_t n, int idx, int dir);
+
+#endif