multi-board files

kiln-tui/src/main.rs

@@ -19,7 +19,7 @@ mod input;
 
 use kiln_core::game::GameState;
 use kiln_core::log::LogLine;
-use kiln_core::map_file;
+use kiln_core::world;
 use ratatui::Frame;
 use ratatui::crossterm::event::{
     self, DisableMouseCapture, EnableMouseCapture, Event, KeyEventKind,
@@ -49,8 +49,14 @@ fn main() -> ExitCode {
     };
 
     // Load before touching the terminal so load errors print to a normal screen.
-    let board = match map_file::load(&path) {
-        Ok(board) => board,
+    let board = match world::load(&path) {
+        Ok(mut w) => match w.boards.remove(&w.start) {
+            Some(b) => b,
+            None => {
+                eprintln!("error: start board '{}' not found", w.start);
+                return ExitCode::FAILURE;
+            }
+        },
         Err(e) => {
             eprintln!("error loading {path}: {e}");
             return ExitCode::FAILURE;