Make gamepad vibration work on web export

Input.start_joy_vibration() is a documented engine no-op on Godot's
HTML5 export (never wired to the browser side). Controls.vibrate()
wraps it: native platforms go straight through as before, web drives
the browser's Gamepad Haptic Actuator API directly via JavaScriptBridge.
Gamepad movement/ability input already worked on desktop browsers via
the standard Web Gamepad API, so only vibration needed a fix.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MXBNaEBmrYDSMcv4NgUWtV

actors/player/player.gd

@@ -835,9 +835,8 @@ func take_sword_hit(cause: String = "", hit_pos: Vector3 = Vector3.ZERO) -> void
 	health_changed.emit(_hp, _max_hp)
 	hit_taken.emit(cause)
 	camera_pivot.call(&"trigger_hit", 0.7)
-	# Vibrate controller 0 with half weak strength, full strong strength, for 0.5 seconds
-	if DP.b("gamepad_vibration"):
-		Input.start_joy_vibration(0, 0.5, 1, 0.2)
+	# Vibrate controller 0 with half weak strength, full strong strength, for 0.2 seconds
+	Controls.vibrate(0, 0.5, 1, 0.2)
 
 	# A spear gores a spot — blood spurts from the entry wound (where it struck the
 	# bull). Melee gores pass no position and skip the spurt; gore can be turned off.