fix(recent-imagery): reject absent box edges instead of inventing zero degrees

src/layers/recentImagery/imagery-box-missing-edge.test.mjs

@@ -0,0 +1,16 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import { validateBox, boxCentre } from './model.js';
+test('missing imagery edges do not turn into invented zero coordinates', () => {
+  for (const value of [null, undefined, '', ' ', false, true]) {
+    const box = { west: value, south: 0, east: 1, north: 1 };
+    assert.equal(validateBox(box).ok, false);
+    assert.equal(validateBox(box).reason, 'invalid');
+    assert.equal(boxCentre(box), null);
+  }
+  assert.equal(validateBox({ west: 0, south: 0, east: 1, north: 1 }).ok, true);
+  assert.equal(
+    validateBox({ west: '0', south: '0', east: '1', north: '1' }).ok,
+    true,
+  );
+});

src/layers/recentImagery/model.js

@@ -77,12 +77,17 @@ const pad2 = (value) => String(value).padStart(2, '0');
  */
 function normalizeBox(box) {
   if (!box || typeof box !== 'object') return null;
-  const [west, south, east, north] = [
-    box.west,
-    box.south,
-    box.east,
-    box.north,
-  ].map(Number);
+  const edges = [box.west, box.south, box.east, box.north];
+  if (
+    edges.some(
+      (value) =>
+        value == null ||
+        typeof value === 'boolean' ||
+        (typeof value === 'string' && !value.trim()),
+    )
+  )
+    return null;
+  const [west, south, east, north] = edges.map(Number);
   if (![west, south, east, north].every(Number.isFinite)) return null;
   return {
     west,