Fix normal radio report submission

The radio button was connected only to the emergency hold handlers, so a
normal Send request never reached _submit. Connect pressed for non-emergency
calls while keeping hold-to-confirm exclusive to emergencies, and add tests
for click, short-hold rejection and full emergency hold. Headless 249/249,
Python 94/94.

src/test/tests/test_radio_panel.gd

@@ -0,0 +1,39 @@
+extends RefCounted
+## Radio form submission: normal calls send on click; emergency calls require
+## the documented hold and do not submit on a quick release.
+
+const RadioPanel := preload("res://src/game/ui/radio_panel.gd")
+
+func test_normal_radio_sends_on_click() -> bool:
+	var panel: RadioPanel = RadioPanel.new()
+	var got := {}
+	panel.submitted.connect(func(report, emergency):
+		got["report"] = report
+		got["emergency"] = emergency)
+	panel.open(null, false, {})
+	panel.action_button.pressed.emit()
+	var a := TestUtils.check(got.has("report"), "normal click emits a report")
+	var b := TestUtils.check(not bool(got.get("emergency", true)), "normal report is not emergency")
+	var c := TestUtils.check(not panel.visible, "panel closes after sending")
+	var d := TestUtils.check_eq(str(got.get("report", {}).get("location", "")), "front entrance",
+		"default location is included")
+	panel.free()
+	return a and b and c and d
+
+func test_emergency_requires_hold() -> bool:
+	var panel: RadioPanel = RadioPanel.new()
+	var calls := {"count": 0}
+	panel.submitted.connect(func(_report, _emergency):
+		calls["count"] = int(calls["count"]) + 1)
+	panel.open(null, true, {})
+	panel.action_button.pressed.emit()
+	var a := TestUtils.check_eq(int(calls["count"]), 0, "quick emergency click does not send")
+	panel.action_button.button_down.emit()
+	panel._process(0.2)
+	panel.action_button.button_up.emit()
+	var b := TestUtils.check_eq(int(calls["count"]), 0, "short hold does not send")
+	panel.action_button.button_down.emit()
+	panel._process(RadioPanel.HOLD_NEEDED + 0.1)
+	var c := TestUtils.check_eq(int(calls["count"]), 1, "full hold sends exactly once")
+	panel.free()
+	return a and b and c