feat(sprint-21): interactive object SFX — 7 new play_sfx wiring calls + AudioManager keys

docs/audio-assets-sprint19.md

@@ -63,3 +63,19 @@ ffmpeg -i input.wav -c:a libvorbis -q:a 4 output.ogg
 - Prefer the primary pick; use the alt only if the primary is unavailable or unsuitable on preview.
 - Keep music loops between 30–60 s to minimize file size on mobile.
 - SFX should be trimmed with a short (~5 ms) fade-out to avoid clicks.
+
+## Sprint 21 — Interactive Object SFX
+
+All CC0 or CC-BY from freesound.org. Replace placeholder 0-byte files with the downloads below.
+
+| File | Description | Freesound suggestion |
+|---|---|---|
+| `assets/audio/sfx/xray_scan.ogg` | electrical hum / machine beep | search "xray machine beep" or "electrical hum short" |
+| `assets/audio/sfx/tea_pour.ogg` | liquid pouring | search "liquid pour short" or "tea pouring" |
+| `assets/audio/sfx/cradle_rock.ogg` | gentle creak / lullaby chime | search "gentle creak wood" or "lullaby chime" |
+| `assets/audio/sfx/gift_open.ogg` | unwrapping / pop | search "gift unwrap" or "pop sound soft" |
+| `assets/audio/sfx/ambulance_siren.ogg` | short siren sting <1.5s child-friendly | search "toy siren short" or "ambulance beep" |
+| `assets/audio/sfx/delivery_cheer.ogg` | happy chime / fanfare | search "happy chime short" or "fanfare child" |
+| `assets/audio/sfx/object_tap.ogg` | soft tap / click | search "soft tap" or "gentle click" |
+
+All files must be <1.5 s, child-friendly (no harsh/loud sounds), mono or stereo, 44100 Hz, OGG Vorbis.

scripts/autoload/AudioManager.gd

@@ -20,6 +20,13 @@ const _SFX_MAP: Dictionary = {
 	"item_drop_outfit":  "res://assets/audio/sfx/item_drop_outfit.ogg",
 	"item_return_chest": "res://assets/audio/sfx/item_return_chest.ogg",
 	"item_drop_floor":   "res://assets/audio/sfx/item_drop_floor.ogg",
+	"xray_scan":         "res://assets/audio/sfx/xray_scan.ogg",
+	"tea_pour":          "res://assets/audio/sfx/tea_pour.ogg",
+	"cradle_rock":       "res://assets/audio/sfx/cradle_rock.ogg",
+	"gift_open":         "res://assets/audio/sfx/gift_open.ogg",
+	"ambulance_siren":   "res://assets/audio/sfx/ambulance_siren.ogg",
+	"delivery_cheer":    "res://assets/audio/sfx/delivery_cheer.ogg",
+	"object_tap":        "res://assets/audio/sfx/object_tap.ogg",
 }
 
 var _current_floor: int = -1

scripts/objects/ambulance.gd

@@ -52,6 +52,7 @@ func _input(event: InputEvent) -> void:
 
 
 func _drive_in() -> void:
+	AudioManager.play_sfx("ambulance_siren")
 	_is_animating = true
 	_is_parked = false
 	var tween: Tween = create_tween()

scripts/objects/cradle.gd

@@ -28,6 +28,7 @@ func _input(event: InputEvent) -> void:
 
 
 func _start_rocking() -> void:
+	AudioManager.play_sfx("cradle_rock")
 	_state = State.ROCKING
 	var tween: Tween = create_tween()
 	tween.set_ease(Tween.EASE_IN_OUT)

scripts/objects/delivery_bed.gd

@@ -44,6 +44,7 @@ func _input(event: InputEvent) -> void:
 
 
 func _start_arrival() -> void:
+	AudioManager.play_sfx("delivery_cheer")
 	_state = State.MAMA_ARRIVING
 	var mama: Node2D = get_node_or_null("Mama") as Node2D
 	if mama == null:

scripts/objects/gift_box.gd

@@ -33,6 +33,7 @@ func _input(event: InputEvent) -> void:
 
 
 func _start_opening() -> void:
+	AudioManager.play_sfx("gift_open")
 	_state = State.OPENING
 	var lid: Node2D = get_node_or_null("Lid") as Node2D
 	if lid == null:

scripts/objects/interactive_object.gd

@@ -39,6 +39,7 @@ func _on_area_input_event(_viewport: Node, event: InputEvent, _shape_idx: int) -
 
 
 func _trigger_interaction() -> void:
+	AudioManager.play_sfx("object_tap")
 	_set_state(State.ACTIVE)
 	object_interacted.emit(self)
 	GameState.set_object_state(object_id, "active")

scripts/objects/tea_pot.gd

@@ -27,6 +27,7 @@ func _input(event: InputEvent) -> void:
 
 
 func _start_pouring() -> void:
+	AudioManager.play_sfx("tea_pour")
 	_state = State.POURING
 	var tween: Tween = create_tween()
 	tween.set_ease(Tween.EASE_IN_OUT)

scripts/objects/xray_machine.gd

@@ -39,6 +39,7 @@ func _input(event: InputEvent) -> void:
 
 
 func _start_scan() -> void:
+	AudioManager.play_sfx("xray_scan")
 	_state = State.SLIDING_IN
 	var plate: Node2D = get_node_or_null("Plate") as Node2D
 	if plate == null:

test/unit/test_audio_manager.gd

@@ -73,3 +73,13 @@ func test_music_map_has_all_four_floors() -> void:
 
 func test_default_music_volume_constant_is_0_6() -> void:
 	assert_eq(AudioManager.DEFAULT_MUSIC_VOLUME, 0.6)
+
+
+func test_sfx_map_has_all_interactive_object_keys() -> void:
+	assert_true(AudioManager._SFX_MAP.has("xray_scan"))
+	assert_true(AudioManager._SFX_MAP.has("tea_pour"))
+	assert_true(AudioManager._SFX_MAP.has("cradle_rock"))
+	assert_true(AudioManager._SFX_MAP.has("gift_open"))
+	assert_true(AudioManager._SFX_MAP.has("ambulance_siren"))
+	assert_true(AudioManager._SFX_MAP.has("delivery_cheer"))
+	assert_true(AudioManager._SFX_MAP.has("object_tap"))