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/game/ui/radio_panel.gd

@@ -105,6 +105,7 @@ func _init() -> void:
 	action_button.text = "Send request"
 	action_button.button_down.connect(func(): _start_hold())
 	action_button.button_up.connect(func(): _stop_hold(false))
+	action_button.pressed.connect(_on_action_pressed)
 	buttons.add_child(action_button)
 	var cancel_btn := Button.new()
 	cancel_btn.text = "Cancel"
@@ -144,6 +145,12 @@ func open(controller: Object, emergency: bool, truth: Dictionary) -> void:
 	_hold_time = 0.0
 	visible = true
 
+## Non-emergency requests are a normal click. Emergency calls require the
+## press-and-hold path, so the click release must not submit early.
+func _on_action_pressed() -> void:
+	if not _emergency:
+		_submit()
+
 func _start_hold() -> void:
 	_holding = _emergency
 	_hold_time = 0.0