fix(ui): address PR review comments

- inputwin.c: improve MB_CUR_MAX error message with actionable advice
- inputwin.c: add log_error when input window pad allocation fails
- statusbar.c: add log_warning for invalid cols values
- window.c: simplify _check_subwin_width using CLAMP macro

src/database.c

@@ -77,8 +77,6 @@ _db_teardown(const char* ctx)
         }
         g_chatlog_database = NULL;
     }
-    // Safe to call unconditionally; no-op if not initialized.
-    // See: https://www.sqlite.org/c3ref/initialize.html
     sqlite3_shutdown();
 }
 

src/ui/statusbar.c

@@ -40,8 +40,6 @@
 #include <string.h>
 #include <stdlib.h>
 
-#include "log.h"
-
 #ifdef HAVE_NCURSESW_NCURSES_H
 #include <ncursesw/ncurses.h>
 #elif HAVE_NCURSES_H