refactor: 使用flutter对原先的web项目重构，正在进行中

tmp/tools/reach-diag.mjs

@@ -0,0 +1,31 @@
+// 诊断：打印可达站立点范围（按行），找出断连位置
+// 用法: node reach-diag.mjs <levelId>
+import { setupGlobals, reach, TILE } from './lib-reach.mjs';
+setupGlobals();
+
+const { LEVELS } = await import('../js/levels/index.js');
+const { Level } = await import('../js/level.js');
+
+const id = process.argv[2] || 'j6';
+const d = LEVELS.find(l => l.id === id);
+const L = new Level(d);
+
+const byRow = new Map();
+const DJSET = (process.env.DJ || '0,6,12,18,24,30').split(',').map(Number);
+const RELSET = (process.env.REL || '0,4,5,6,8,14').split(',').map(Number);
+const r = reach(L, {
+  DJSET, RELSET,
+  onState: s => {
+    const row = Math.round(s.fy / TILE);
+    const cur = byRow.get(row) || { max: -1, min: 1e9 };
+    byRow.set(row, { max: Math.max(cur.max, s.fx), min: Math.min(cur.min, s.fx) });
+  },
+});
+
+console.log(`${id} ${d.name}  ${L.w}x${L.h}  状态=${r.states}${r.err ? '  ERR:' + r.err : ''}`);
+[...byRow.keys()].sort((a, b) => b - a).forEach(row => {
+  const v = byRow.get(row);
+  console.log(`  row ${String(row).padStart(2)} (y=${row * TILE}): x ${(v.min / TILE).toFixed(1)} .. ${(v.max / TILE).toFixed(1)} 格`);
+});
+for (const e of L.entities) if (e.type === 'goal' || e.type === 'save')
+  console.log(`  ${e.type}#${e.no ?? ''} at col ${e.tx}, row ${e.ty}`);