test(ui): wrong-body Pending must not touch retry state (PR #193 Hoshe finding 1)

Pins on_response()'s guard ordering: body_id check BEFORE the status
branch, so another body's cold Pending can never burn one of our 30
retries or reschedule our timer (multi-body browsing / shared-broadcast
tile fan-out). Revert-verified: reordering the guards makes this test
fail; final own-body Ready assertion proves the request is genuinely
untouched, not just un-retried. 44/44 in the file.

Tickets: T-1163

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/tests/test_atlas_window_request.gd

@@ -562,6 +562,41 @@ func test_cold_request_error_gives_up_immediately_without_retry() -> void:
 	assert_int(req._retries).is_equal(0)
 
 
+## PR #193 review (Hoshe): a whole-response Pending for a DIFFERENT body
+## must not touch this request's retry state — the body_id guard runs
+## BEFORE the status branch in on_response(), so someone else's cold-body
+## pending can never burn one of OUR 30 retries (or reschedule our timer).
+## Structurally guaranteed by guard ordering today; this test pins the
+## ordering, because a refactor that moves the status branch first would
+## silently cross-wire every concurrent cold descent (multi-body Atlas
+## browsing, or the orbital tile fan-out where all requests share one
+## broadcast signal). The final Ready-for-OUR-body assertion proves the
+## request is genuinely unaffected, not just un-retried.
+func test_pending_for_a_different_body_does_not_touch_retry_state() -> void:
+	var req = _make_request()
+	req.request_now("GJ380c", Vector2i(2, 2), 2)
+	assert_bool(req.is_pending()).is_true()
+
+	req.on_response(_pending_response("OtherBody"))
+
+	assert_int(req._retries).override_failure_message(
+		"a Pending for a DIFFERENT body must not increment OUR retry counter"
+		+ " — the body_id guard must run before the status branch"
+	).is_equal(0)
+	assert_bool(req.is_pending()).override_failure_message(
+		"a wrong-body Pending must leave the request still pending its own"
+		+ " response, neither given up nor retried"
+	).is_true()
+
+	var window: Dictionary = _mock_window(Vector2i(2, 2), 2)
+	req.on_response(_mock_response("GJ380c", window))
+	assert_bool(req.is_pending()).override_failure_message(
+		"after ignoring a wrong-body Pending, our OWN Ready must still be"
+		+ " accepted normally — the request state must be genuinely untouched"
+	).is_false()
+	assert_int(req._retries).is_equal(0)
+
+
 # =============================================================================
 # _retry_delay_for() — deterministic exponential backoff + per-tile stagger
 # (PR #192 cold-start round 3 hardening: 6 tiles retrying in perfect