Rename the factory to Robot Market, fix GPS search and add GPS test points

- The factory company is now "شرکت روبات مارکت" on signs, dialogue,
  briefing, map label, manifest and README
- Real-world mode no longer shows "location not found" for every
  problem: it takes a quick coarse Wi-Fi/network fix first, keeps
  searching after a GPS timeout, and reports permission denied (1),
  location off (2), still searching (3) or a non-HTTPS page separately
- Three GPS test machines at real coordinates beside the factory, only
  present in real-world mode; the closest machine within reach is used
  and the arrival radius is twice the GPS error (12–40 m)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/realworld.test.js

@@ -15,8 +15,8 @@ test('GPS fixes blend by accuracy and a stale estimate is replaced', () => {
 });
 
 test('Arrival radius widens with poor GPS and bounds check the world', () => {
-    assert.equal(arrivalRadius(5), 20);
-    assert.equal(arrivalRadius(20), 30);
+    assert.equal(arrivalRadius(4), 12);
+    assert.equal(arrivalRadius(10), 20);
     assert.equal(arrivalRadius(100), 40);
     const bounds = {minX: -10, minZ: -10, maxX: 10, maxZ: 10};
     assert.ok(insideWorld(bounds, 0, 0));