fix(imagery): refuse blank box edges at every conversion

Share-link integers and Cesium radians were converted before normalizeBox
checked them, so a blank edge still became 0°. Edges are now accepted only as
numbers or non-blank numeric strings, which also refuses [] and {}. Tests cover
all four edges through validateBox, dequantizeBox, boxFromRectangle and
searchHls.

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

@@ -1,6 +1,13 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
-import { validateBox, boxCentre } from './model.js';
+import {
+  boxCentre,
+  boxFromRectangle,
+  dequantizeBox,
+  validateBox,
+} from './model.js';
+import { searchHls } from './catalog.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 };
@@ -14,3 +21,28 @@ test('missing imagery edges do not turn into invented zero coordinates', () => {
     true,
   );
 });
+
+test('every edge and every box entry point refuses a missing edge', async () => {
+  const blanks = [null, undefined, '', ' ', false, [], {}];
+  for (const edge of ['west', 'south', 'east', 'north']) {
+    for (const value of blanks) {
+      const box = { west: 1, south: 1, east: 2, north: 2, [edge]: value };
+      assert.equal(validateBox(box).ok, false, `${edge}=${String(value)}`);
+      // Share-link integers and Cesium radians are converted per edge.
+      assert.equal(dequantizeBox(box), null, `share ${edge}`);
+      assert.equal(boxFromRectangle(box), null, `radians ${edge}`);
+    }
+  }
+  let fetched = false;
+  await assert.rejects(
+    searchHls({
+      box: { west: ' ', south: 1, east: 2, north: 2 },
+      fetchImpl: async () => {
+        fetched = true;
+      },
+    }),
+    TypeError,
+  );
+  assert.equal(fetched, false);
+  assert.ok(dequantizeBox({ west: 0, south: 0, east: 100000, north: 100000 }));
+});