feat: ithnk full utf8 support & ui 100% consistent

include/config.h

@@ -14,20 +14,13 @@ enum introspection_type {
   KEY,
   STRING_ARRAY,
 };
-static const char* const intros_tys_names[] = {
+static const char* NNULLABLE const intros_tys_names[] = {
     [STRING] = "STRING",
     [BOOL] = "BOOL",
     [KEY] = "KEY",
     [STRING_ARRAY] = "STRING_ARRAY",
 };
 
-union introspection_variant {
-  char* string;
-  bool boolean;
-  enum keys key;
-  char** string_array;
-};
-
 struct introspection_item {
   char* NNULLABLE name;
   size_t offset;

include/ofield.h

@@ -18,6 +18,6 @@ void ofield_kbd_type(struct opts_field* self, char* typed, char* empty_default);
 bool ofield_opts_seek(struct opts_field* self, char seek);
 bool ofield_seek(struct opts_field* self, char seek);
 
-u_char ofield_display_cursor_col(struct opts_field* self);
+u_char ofield_display_cursor_col(struct opts_field* self, u_char maxlen);
 
 #endif

include/ui.h

@@ -5,13 +5,43 @@
 #include "ofield.h"
 #include "util.h"
 
+//    [box_start]
+//    ↓
+// 0 [┌]───────────────────────────────────────────────┐
+// 1  │                                                │
+// 2  │    the-art                2025-06-20 21:40:44  │
+// 3  │                                             |  │
+// 4  │                                             |  │
+// 5  │       xorg   < Default >                    |  │
+// 6  │                                             |  │
+// 7  │       user   javalsai                       |  │
+// 8  │                                             |  │
+// 9  │   password   ________________________________  │
+// 10 │          |                                  |  │
+// 11 └────────────────────────────────────────────────┘
+//    01234567890123456789012345678901234567890123456789
+//    00000000001111111111222222222233333333334444444444
+//    |--|       |   ↑                              |--|[BOX_HMARGIN]
+//    [BOX_HMARGIN]  [VALUES_COL]                    |
+//               |---|[VALUES_SEPR]                  |
+//                  |--------------------------------|[VALUE_MAXLEN]
+
+#define HEAD_ROW 2
+#define SESSION_ROW 5
+#define USER_ROW 7
+#define PASSWD_ROW 9
+
+#define BOX_WIDTH 50
+#define BOX_HEIGHT 12
+#define BOX_HMARGIN 2
+
+#define VALUES_COL 15
+#define VALUES_SEPR 3
+#define VALUE_MAXLEN (BOX_WIDTH - VALUES_COL + 1 - BOX_HMARGIN - 2)
+
 enum input { SESSION, USER, PASSWD };
 extern const u_char inputs_n;
 
-// not customizable (for now)
-extern const uint boxw;
-extern const uint boxh;
-
 void setup(struct config* config);
 int load(struct Vector* users, struct Vector* sessions);
 void print_err(const char*);

include/util.h

@@ -9,15 +9,16 @@
 
 #include "keys.h"
 
-int find_keyname(enum keys* at, char* name);
-enum keys find_ansi(char*);
+int find_keyname(enum keys* at, const char* name);
+enum keys find_ansi(const char*);
 void read_press(u_char*, char*);
 
 bool utf8_iscont(char byte);
-size_t utf8len(char* str);
-size_t utf8len_until(char* str, char* until);
-char* utf8back(char* str);
-char* utf8seek(char* str);
+size_t utf8len(const char* str);
+size_t utf8len_until(const char* str, const char* until);
+const char* utf8back(const char* str);
+const char* utf8seek(const char* str);
+const char* utf8seekn(const char* str, size_t n);
 
 struct Vector {
   uint32_t length;