feat(mvp): complete M13 clean-up milestone (real usernames, avatar studio redesign, pause menu, audio manager)

backend/app/routers/social_friends.py

@@ -46,7 +46,8 @@ DbDep = Annotated[AsyncSession, Depends(get_db)]
 
 
 class FriendRequestCreate(BaseModel):
-    user_id: int
+    user_id: int | None = None
+    username: str | None = None
 
 
 class FriendRequestResponse(BaseModel):
@@ -55,6 +56,7 @@ class FriendRequestResponse(BaseModel):
     addressee_id: int
     status: FriendshipStatus
     created_at: datetime
+    requester_username: str | None = None
 
     model_config = {"from_attributes": True}
 
@@ -132,7 +134,18 @@ async def _get_user_or_404(db: AsyncSession, user_id: int) -> User:
 @router.post("/requests", response_model=FriendRequestResponse, status_code=status.HTTP_201_CREATED)
 async def send_friend_request(body: FriendRequestCreate, current_user: CurrentUser, db: DbDep):
     """Send a friend request to another user."""
+    target_id: int
+    if body.user_id is not None and body.user_id > 0:
         target_id = body.user_id
+    elif body.username is not None and body.username.strip() != "":
+        u_result = await db.execute(select(User).where(User.username == body.username.strip()))
+        user = u_result.scalar_one_or_none()
+        if user is None:
+            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+        target_id = user.id
+    else:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="user_id or username required")
+
     if target_id == current_user.id:
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Cannot send a friend request to yourself")
 
@@ -153,19 +166,39 @@ async def send_friend_request(body: FriendRequestCreate, current_user: CurrentUs
         await db.rollback()
         raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail="Friend request or friendship already exists")
     await db.refresh(fr)
-    return fr
+    return FriendRequestResponse(
+        id=fr.id,
+        requester_id=fr.requester_id,
+        addressee_id=fr.addressee_id,
+        status=fr.status,
+        created_at=fr.created_at,
+        requester_username=current_user.username,
+    )
 
 
 @router.get("/requests", response_model=FriendRequestListResponse)
 async def list_incoming_requests(current_user: CurrentUser, db: DbDep):
     """List pending friend requests sent *to* the authenticated user."""
     result = await db.execute(
-        select(Friendship).where(
+        select(Friendship, User.username)
+        .join(User, Friendship.requester_id == User.id)
+        .where(
             Friendship.addressee_id == current_user.id,
             Friendship.status == FriendshipStatus.PENDING,
         )
     )
-    return FriendRequestListResponse(requests=list(result.scalars().all()))
+    requests = [
+        FriendRequestResponse(
+            id=fr.id,
+            requester_id=fr.requester_id,
+            addressee_id=fr.addressee_id,
+            status=fr.status,
+            created_at=fr.created_at,
+            requester_username=uname,
+        )
+        for fr, uname in result.all()
+    ]
+    return FriendRequestListResponse(requests=requests)
 
 
 @router.post("/requests/{request_id}/accept", response_model=FriendRequestResponse)

backend/app/routers/users.py

@@ -25,6 +25,13 @@ class UserResponse(BaseModel):
     model_config = {"from_attributes": True}
 
 
+class UserSummary(BaseModel):
+    id: int
+    username: str
+
+    model_config = {"from_attributes": True}
+
+
 class UserUpdate(BaseModel):
     email: EmailStr | None = None
     is_active: bool | None = None
@@ -40,6 +47,43 @@ async def get_current_user_profile(
     return current_user
 
 
+@router.get("/search", response_model=list[UserSummary])
+async def search_users(
+    current_user: CurrentUser,
+    db: Annotated[AsyncSession, Depends(get_db)],
+    q: str = "",
+    limit: int = 20,
+):
+    """Search active users by username substring."""
+    cleaned_q = q.strip()
+    result = await db.execute(
+        select(User)
+        .where(
+            User.is_active == True,
+            User.username.ilike(f"%{cleaned_q}%"),
+            User.id != current_user.id,
+        )
+        .limit(limit)
+    )
+    return list(result.scalars().all())
+
+
+@router.get("/by-username/{username}", response_model=UserSummary)
+async def get_user_by_username(
+    username: str,
+    current_user: CurrentUser,
+    db: Annotated[AsyncSession, Depends(get_db)],
+):
+    """Get active user by exact username."""
+    result = await db.execute(
+        select(User).where(User.username == username.strip(), User.is_active == True)
+    )
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+    return user
+
+
 @router.get("/{user_id}", response_model=UserResponse)
 async def get_user(
     user_id: int,

backend/tests/test_social_friends.py

@@ -127,6 +127,26 @@ class TestFriendRequestFlow:
         again = client.delete(f"/api/friends/{a['id']}", headers=b["headers"])
         assert again.status_code == 404
 
+    def test_send_request_by_username_populates_requester_username(self):
+        client = TestClient(app)
+        a = _register(client, "fr_uname_a")
+        b = _register(client, "fr_uname_b")
+
+        resp = client.post(
+            "/api/friends/requests", json={"username": "fr_uname_b"}, headers=a["headers"]
+        )
+        assert resp.status_code == 201, resp.text
+        req_data = resp.json()
+        assert req_data["status"] == "pending"
+        assert req_data.get("requester_username") == "fr_uname_a"
+
+        incoming = client.get("/api/friends/requests", headers=b["headers"])
+        assert incoming.status_code == 200, incoming.text
+        reqs = incoming.json()["requests"]
+        matching = [r for r in reqs if r["id"] == req_data["id"]]
+        assert len(matching) == 1
+        assert matching[0]["requester_username"] == "fr_uname_a"
+
 
 class TestSelfAndDuplicateRejection:
     def test_self_request_rejected(self):
@@ -315,3 +335,27 @@ class TestDataIsolation:
         assert client.get("/api/friends/following").status_code == 401
         assert client.get("/api/friends/blocked").status_code == 401
         assert client.post("/api/friends/requests", json={"user_id": 1}).status_code == 401
+
+
+class TestUserSearchAndLookup:
+    def test_search_and_lookup_by_username(self):
+        client = TestClient(app)
+        u1 = _register(client, "usr_srch_1")
+        u2 = _register(client, "usr_srch_2")
+
+        # Search excludes current user
+        search_res = client.get("/api/users/search?q=usr_srch", headers=u1["headers"])
+        assert search_res.status_code == 200, search_res.text
+        names = [u["username"] for u in search_res.json()]
+        assert "usr_srch_2" in names
+        assert "usr_srch_1" not in names
+
+        # Lookup by username
+        lookup_res = client.get("/api/users/by-username/usr_srch_2", headers=u1["headers"])
+        assert lookup_res.status_code == 200, lookup_res.text
+        assert lookup_res.json()["username"] == "usr_srch_2"
+        assert lookup_res.json()["id"] == u2["id"]
+
+        # Lookup 404 for unknown user
+        missing = client.get("/api/users/by-username/nonexistent_usr_xyz", headers=u1["headers"])
+        assert missing.status_code == 404

project.godot

@@ -14,6 +14,7 @@ agp/api_base_url="http://127.0.0.1:8000"
 [autoload]
 
 ApiClient="*res://scripts/api_client.gd"
+AudioManager="*res://scripts/audio_manager.gd"
 AvatarSystem="*res://scripts/avatar/avatar_system.gd"
 Session="*res://scripts/session.gd"
 

scenes/friends_presence_ui.tscn

@@ -99,7 +99,7 @@ theme_override_constants/separation = 8
 [node name="TargetUserIdEdit" type="LineEdit" parent="VBoxContainer/TabContainer/Requests/SendHBox"]
 layout_mode = 2
 size_flags_horizontal = 3
-placeholder_text = "Enter User ID to add..."
+placeholder_text = "Enter username or ID..."
 
 [node name="SendButton" type="Button" parent="VBoxContainer/TabContainer/Requests/SendHBox"]
 custom_minimum_size = Vector2(120, 32)
@@ -128,7 +128,7 @@ theme_override_constants/separation = 8
 [node name="FollowUserIdEdit" type="LineEdit" parent="VBoxContainer/TabContainer/Following/FollowHBox"]
 layout_mode = 2
 size_flags_horizontal = 3
-placeholder_text = "Enter User ID to follow..."
+placeholder_text = "Enter username or ID..."
 
 [node name="FollowButton" type="Button" parent="VBoxContainer/TabContainer/Following/FollowHBox"]
 custom_minimum_size = Vector2(100, 32)
@@ -157,7 +157,7 @@ theme_override_constants/separation = 8
 [node name="BlockUserIdEdit" type="LineEdit" parent="VBoxContainer/TabContainer/Blocked/BlockHBox"]
 layout_mode = 2
 size_flags_horizontal = 3
-placeholder_text = "Enter User ID to block..."
+placeholder_text = "Enter username or ID..."
 
 [node name="BlockButton" type="Button" parent="VBoxContainer/TabContainer/Blocked/BlockHBox"]
 custom_minimum_size = Vector2(100, 32)

scripts/api_client.gd

@@ -39,6 +39,10 @@ extends Node
 var _access_token: String = ""
 var _token_type: String = "Bearer"
 
+## Authenticated user identity
+var current_user_id: int = 0
+var current_username: String = ""
+
 ## Full Authorization header value, e.g. "Bearer eyJ...". Empty if no token.
 var bearer_token: String:
 	get:
@@ -61,6 +65,8 @@ func set_token(access_token: String, token_type: String = "Bearer") -> void:
 func clear_token() -> void:
 	_access_token = ""
 	_token_type = "Bearer"
+	current_user_id = 0
+	current_username = ""
 
 
 # ---------------------------------------------------------------------------
@@ -209,6 +215,12 @@ func login(username: String, password: String) -> Dictionary:
 		false
 	)
 	_store_token_from_result(result)
+	if result.ok:
+		current_username = username
+		var me := await get_me()
+		if me.ok and me.data is Dictionary:
+			current_user_id = int((me.data as Dictionary).get("id", 0))
+			current_username = str((me.data as Dictionary).get("username", username))
 	return result
 
 
@@ -246,6 +258,12 @@ func register(
 		false
 	)
 	_store_token_from_result(result)
+	if result.ok:
+		current_username = username
+		var me := await get_me()
+		if me.ok and me.data is Dictionary:
+			current_user_id = int((me.data as Dictionary).get("id", 0))
+			current_username = str((me.data as Dictionary).get("username", username))
 	return result
 
 
@@ -282,7 +300,23 @@ func health_check() -> Dictionary:
 
 ## Fetch the current user's profile from the stored JWT (requires auth).
 func get_me() -> Dictionary:
-	return await request(HTTPClient.METHOD_GET, "/api/users/me", "", "application/json", true)
+	var result := await request(HTTPClient.METHOD_GET, "/api/users/me", "", "application/json", true)
+	if result.ok and result.data is Dictionary:
+		current_user_id = int((result.data as Dictionary).get("id", 0))
+		current_username = str((result.data as Dictionary).get("username", current_username))
+	return result
+
+
+## Search active users by username substring (requires auth).
+func search_users(query: String, limit: int = 20) -> Dictionary:
+	var path := "/api/users/search?q=%s&limit=%d" % [query.uri_encode(), limit]
+	return await request(HTTPClient.METHOD_GET, path, "", "application/json", true)
+
+
+## Get active user summary by exact username (requires auth).
+func get_user_by_username(username: String) -> Dictionary:
+	var path := "/api/users/by-username/%s" % username.strip_edges().uri_encode()
+	return await request(HTTPClient.METHOD_GET, path, "", "application/json", true)
 
 
 ## Fetch the current user's saved avatar loadout (requires auth).
@@ -312,9 +346,19 @@ func save_avatar_loadout(loadout: Dictionary) -> Dictionary:
 # Social Features: Friends, Follow & Block
 # ---------------------------------------------------------------------------
 
-## Send a friend request to target user_id.
-func send_friend_request(user_id: int) -> Dictionary:
-	return await SocialApiClient.send_friend_request(self, user_id)
+## Send a friend request to target user_id (int) or username (String).
+func send_friend_request(target: Variant) -> Dictionary:
+	var payload: Dictionary = {}
+	if target is int:
+		payload = {"user_id": target}
+	elif target is String:
+		if (target as String).is_valid_int():
+			payload = {"user_id": int(target)}
+		else:
+			payload = {"username": (target as String).strip_edges()}
+	else:
+		payload = {"user_id": int(target)}
+	return await request(HTTPClient.METHOD_POST, "/api/friends/requests", JSON.stringify(payload), "application/json", true)
 
 ## Get pending incoming friend requests.
 func get_friend_requests() -> Dictionary:
@@ -336,9 +380,14 @@ func unfriend(user_id: int) -> Dictionary:
 func get_friends() -> Dictionary:
 	return await SocialApiClient.get_friends(self)
 
-## Follow a user.
-func follow_user(user_id: int) -> Dictionary:
-	return await SocialApiClient.follow_user(self, user_id)
+## Follow a user by ID or username.
+func follow_user(target: Variant) -> Dictionary:
+	if target is String and not (target as String).is_valid_int():
+		var lookup := await get_user_by_username((target as String).strip_edges())
+		if not lookup.ok:
+			return lookup
+		target = int(lookup.data["id"])
+	return await request(HTTPClient.METHOD_POST, "/api/friends/%d/follow" % int(target), "", "application/json", true)
 
 ## Unfollow a user.
 func unfollow_user(user_id: int) -> Dictionary:
@@ -348,9 +397,14 @@ func unfollow_user(user_id: int) -> Dictionary:
 func get_following() -> Dictionary:
 	return await SocialApiClient.get_following(self)
 
-## Block a user.
-func block_user(user_id: int) -> Dictionary:
-	return await SocialApiClient.block_user(self, user_id)
+## Block a user by ID or username.
+func block_user(target: Variant) -> Dictionary:
+	if target is String and not (target as String).is_valid_int():
+		var lookup := await get_user_by_username((target as String).strip_edges())
+		if not lookup.ok:
+			return lookup
+		target = int(lookup.data["id"])
+	return await request(HTTPClient.METHOD_POST, "/api/friends/%d/block" % int(target), "", "application/json", true)
 
 ## Unblock a user.
 func unblock_user(user_id: int) -> Dictionary:

scripts/audio_manager.gd

@@ -0,0 +1,128 @@
+extends Node
+## Central Audio Manager singleton (autoload name: "AudioManager").
+##
+## Pre-warms an AudioStreamPlayer pool for UI and game SFX.
+## Provides convenience methods for standard sound effects and
+## automatically hooks UI buttons for tactile click audio feedback.
+
+const STREAM_CLICK: AudioStream = preload("res://assets/audio/click.wav")
+const STREAM_COIN: AudioStream = preload("res://assets/audio/coin.wav")
+const STREAM_CHIME: AudioStream = preload("res://assets/audio/chime.wav")
+const STREAM_FANFARE: AudioStream = preload("res://assets/audio/fanfare.wav")
+const STREAM_BELL: AudioStream = preload("res://assets/audio/bell.wav")
+const STREAM_DOOR: AudioStream = preload("res://assets/audio/door_open.wav")
+
+const POOL_SIZE: int = 16
+
+var _players: Array[AudioStreamPlayer] = []
+var _player_index: int = 0
+
+## Number of active AudioStreamPlayers in the pool.
+var pool_size: int:
+	get:
+		return _players.size()
+
+
+func _ready() -> void:
+	process_mode = Node.PROCESS_MODE_ALWAYS
+	_init_pool()
+	var tree := get_tree()
+	if tree != null:
+		tree.node_added.connect(_on_node_added)
+		_hook_existing_buttons(tree.root)
+
+
+func _init_pool() -> void:
+	if not _players.is_empty():
+		return
+	for i in range(POOL_SIZE):
+		var player := AudioStreamPlayer.new()
+		player.name = "AudioPlayer_%d" % i
+		player.bus = "Master"
+		add_child(player)
+		_players.append(player)
+
+
+## Play an audio stream on the specified bus with volume and pitch settings.
+func play_sound(stream: AudioStream, bus: String = "Master", volume_db: float = 0.0, pitch_scale: float = 1.0) -> AudioStreamPlayer:
+	if stream == null:
+		return null
+	if _players.is_empty():
+		_init_pool()
+
+	var player: AudioStreamPlayer = _players[_player_index]
+	_player_index = (_player_index + 1) % POOL_SIZE
+
+	if player.playing:
+		player.stop()
+
+	player.stream = stream
+	player.bus = bus
+	player.volume_db = volume_db
+	player.pitch_scale = pitch_scale
+	player.play()
+	return player
+
+
+## Play UI button click with subtle random pitch variance.
+func play_click(volume_db: float = 0.0, pitch_variance: float = 0.05) -> AudioStreamPlayer:
+	var pitch := 1.0
+	if pitch_variance > 0.0:
+		pitch += randf_range(-pitch_variance, pitch_variance)
+	return play_sound(STREAM_CLICK, "Master", volume_db, pitch)
+
+
+## Play coin transaction sound (credits / marketplace / payouts).
+func play_coin(volume_db: float = 0.0) -> AudioStreamPlayer:
+	return play_sound(STREAM_COIN, "Master", volume_db, 1.0)
+
+
+## Play chime sound (successful world / chunk save).
+func play_chime(volume_db: float = 0.0) -> AudioStreamPlayer:
+	return play_sound(STREAM_CHIME, "Master", volume_db, 1.0)
+
+
+## Play victory / achievement fanfare.
+func play_fanfare(volume_db: float = 0.0) -> AudioStreamPlayer:
+	return play_sound(STREAM_FANFARE, "Master", volume_db, 1.0)
+
+
+## Play alert bell sound.
+func play_bell(volume_db: float = 0.0) -> AudioStreamPlayer:
+	return play_sound(STREAM_BELL, "Master", volume_db, 1.0)
+
+
+## Play door open transition sound.
+func play_door(volume_db: float = 0.0) -> AudioStreamPlayer:
+	return play_sound(STREAM_DOOR, "Master", volume_db, 1.0)
+
+
+# ---------------------------------------------------------------------------
+# Universal Tactile UI Click Wiring
+# ---------------------------------------------------------------------------
+
+func _on_node_added(node: Node) -> void:
+	if node is BaseButton:
+		_hook_button(node as BaseButton)
+
+
+func _hook_existing_buttons(node: Node) -> void:
+	if node is BaseButton:
+		_hook_button(node as BaseButton)
+	for child in node.get_children():
+		_hook_existing_buttons(child)
+
+
+func _hook_button(btn: BaseButton) -> void:
+	var callable := Callable(self, "_on_button_pressed").bind(btn)
+	if not btn.pressed.is_connected(callable):
+		btn.pressed.connect(callable)
+
+
+func _on_button_pressed(btn: BaseButton) -> void:
+	if not is_instance_valid(btn):
+		return
+	if btn.is_in_group("no_click_sound"):
+		return
+	if btn.is_visible_in_tree() and not btn.disabled:
+		play_click()

scripts/avatar_customization_screen.gd

@@ -2,8 +2,9 @@ extends Control
 ## Full-screen host for the AvatarCustomizationUI.
 ##
 ## The UI itself (scripts/avatar/avatar_customization_ui.gd) builds its own
-## layout programmatically and emits `closed` when the player backs out; this
-## thin wrapper is what makes it a navigable scene reachable from the main menu.
+## layout programmatically, auto-saves on exit, and emits `closed` / `back_requested`
+## when the player backs out. This thin wrapper hosts it as a navigable scene
+## reachable from the main menu and handles ESC / back transitions.
 
 const AvatarCustomizationUI := preload("res://scripts/avatar/avatar_customization_ui.gd")
 
@@ -18,3 +19,13 @@ func _ready() -> void:
 
 func _on_closed() -> void:
 	get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		var ui = get_node_or_null("AvatarCustomizationUI")
+		if ui != null and ui.has_method("save_and_exit"):
+			ui.save_and_exit()
+		else:
+			_on_closed()

scripts/chat_ui.gd

@@ -99,6 +99,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_message(text: String, is_error: bool = false) -> void:
 	if status_label:
 		status_label.text = text

scripts/controls_modal.gd

@@ -0,0 +1,101 @@
+class_name ControlsModal
+extends Control
+## Controls & Keybindings Guide Modal.
+##
+## Displays keyboard and mouse bindings clearly in-game and from the main menu.
+
+signal closed
+
+const CONTROLS_DATA = [
+	{"key": "W A S D", "action": "Move character"},
+	{"key": "Space", "action": "Jump"},
+	{"key": "Mouse", "action": "Look / Rotate camera"},
+	{"key": "E", "action": "Interact with objects & chests"},
+	{"key": "T / Enter", "action": "Open In-World Chat"},
+	{"key": "Tab / F1", "action": "Friends & Social Panel"},
+	{"key": "F2", "action": "Creator Studio / World Editor"},
+	{"key": "F11 / Alt+Enter", "action": "Toggle Fullscreen"},
+	{"key": "ESC", "action": "Pause Menu / Go Back / Close Modal"},
+]
+
+
+func _init() -> void:
+	name = "ControlsModal"
+	set_anchors_preset(Control.PRESET_FULL_RECT)
+
+
+func _ready() -> void:
+	mouse_filter = Control.MOUSE_FILTER_STOP
+
+	var bg := ColorRect.new()
+	bg.color = Color(0.04, 0.05, 0.08, 0.88)
+	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
+	add_child(bg)
+
+	var center := CenterContainer.new()
+	center.set_anchors_preset(Control.PRESET_FULL_RECT)
+	add_child(center)
+
+	var panel := PanelContainer.new()
+	panel.custom_minimum_size = Vector2(520, 0)
+	var style := StyleBoxFlat.new()
+	style.bg_color = Color(0.12, 0.14, 0.19, 0.98)
+	style.border_color = Color(0.4, 0.55, 0.8, 1.0)
+	style.set_border_width_all(2)
+	style.set_corner_radius_all(10)
+	style.content_margin_left = 28
+	style.content_margin_right = 28
+	style.content_margin_top = 22
+	style.content_margin_bottom = 22
+	panel.add_theme_stylebox_override("panel", style)
+	center.add_child(panel)
+
+	var vbox := VBoxContainer.new()
+	vbox.add_theme_constant_override("separation", 16)
+	panel.add_child(vbox)
+
+	var title := Label.new()
+	title.text = "Keyboard & Mouse Controls"
+	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	title.add_theme_font_size_override("font_size", 22)
+	title.add_theme_color_override("font_color", Color(1.0, 1.0, 1.0))
+	vbox.add_child(title)
+
+	var grid := GridContainer.new()
+	grid.columns = 2
+	grid.add_theme_constant_override("h_separation", 24)
+	grid.add_theme_constant_override("v_separation", 10)
+	vbox.add_child(grid)
+
+	for item in CONTROLS_DATA:
+		var key_lbl := Label.new()
+		key_lbl.text = item["key"]
+		key_lbl.add_theme_font_size_override("font_size", 14)
+		key_lbl.add_theme_color_override("font_color", Color(0.95, 0.8, 0.3))
+		key_lbl.size_flags_horizontal = Control.SIZE_SHRINK_BEGIN
+		grid.add_child(key_lbl)
+
+		var action_lbl := Label.new()
+		action_lbl.text = item["action"]
+		action_lbl.add_theme_font_size_override("font_size", 14)
+		action_lbl.add_theme_color_override("font_color", Color(0.85, 0.9, 0.95))
+		action_lbl.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+		grid.add_child(action_lbl)
+
+	var close_btn := Button.new()
+	close_btn.text = "Close (ESC)"
+	close_btn.custom_minimum_size = Vector2(140, 36)
+	close_btn.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
+	close_btn.pressed.connect(_on_close_pressed)
+	vbox.add_child(close_btn)
+
+
+func _on_close_pressed() -> void:
+	closed.emit()
+	queue_free()
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_close_pressed()

scripts/discovery_ui.gd

@@ -399,3 +399,14 @@ func _on_back_pressed() -> void:
 func _on_world_list_pressed() -> void:
 	if get_tree():
 		get_tree().change_scene_to_file("res://scenes/world_list.tscn")
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		for child in get_children():
+			if child is WorldBriefingModal:
+				child.queue_free()
+				get_viewport().set_input_as_handled()
+				return
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()

scripts/editor/ui/in_game_editor.gd

@@ -24,6 +24,7 @@ extends Control
 ## UI and the in-memory `ChunkEditorModel` is unaffected either way.
 
 signal closed
+signal exit_browser_requested
 
 var core: EditorCore
 
@@ -32,12 +33,17 @@ var _palette: PalettePanel
 var _inspector: InspectorPanel
 var _viewport: EditorViewport
 var _close_button: Button
+var _exit_browser_button: Button
 var _save_button: Button
 var _save_as_button: Button
 var _save_status_label: Label
 var _instruction_label: Label
 var _save_as_modal: Control = null
 
+var AudioManager: Node:
+	get:
+		return get_node_or_null("/root/AudioManager")
+
 
 ## Save-path state (world_persistence_impl.md §8.1/§8.2), set via
 ## `setup_persistence()`. `_save_service == null` means there is nothing to
@@ -118,11 +124,18 @@ func _build_ui() -> void:
 
 
 	_close_button = Button.new()
-	_close_button.text = "Close (F2 / Esc)"
-	_close_button.tooltip_text = "Exit build mode and return to game"
+	_close_button.text = "▶ Playtest (F2)"
+	_close_button.tooltip_text = "Exit build mode and test world in 3D play mode (F2 / Esc)"
+	_close_button.add_theme_color_override("font_color", Color(0.4, 0.9, 0.5))
 	_close_button.pressed.connect(_on_close_pressed)
 	top_bar.add_child(_close_button)
 
+	_exit_browser_button = Button.new()
+	_exit_browser_button.text = "🚪 Exit to Browser"
+	_exit_browser_button.tooltip_text = "Exit world and return to world browser"
+	_exit_browser_button.pressed.connect(_on_exit_browser_pressed)
+	top_bar.add_child(_exit_browser_button)
+
 	_instruction_label = Label.new()
 	_instruction_label.add_theme_font_size_override("font_size", 13)
 	_instruction_label.add_theme_color_override("font_color", Color(0.75, 0.92, 1.0))
@@ -206,6 +219,12 @@ func _unhandled_key_input(event: InputEvent) -> void:
 		_on_tool_selected("erase")
 		_toolbar.set_active_tool("erase")
 		get_viewport().set_input_as_handled()
+	elif key.keycode == KEY_ESCAPE:
+		if _save_as_modal != null and is_instance_valid(_save_as_modal):
+			_save_as_modal.queue_free()
+			_save_as_modal = null
+			get_viewport().set_input_as_handled()
+			return
 
 
 func _on_tool_selected(tool_id: String) -> void:
@@ -311,6 +330,7 @@ func _on_save_pressed() -> void:
 	_save_button.disabled = false
 
 	if result.get("ok", false):
+		AudioManager.play_chime()
 		_base_revision = int(result.get("revision", _base_revision))
 		var msg := "Saved (revision %d)." % _base_revision
 		if bool(result.get("retried", false)):
@@ -506,3 +526,10 @@ func _api_client() -> Node:
 func _session() -> Node:
 	return get_node_or_null("/root/Session")
 
+
+func _on_exit_browser_pressed() -> void:
+	exit_browser_requested.emit()
+	var sess := _session()
+	if sess != null:
+		sess.clear()
+	get_tree().change_scene_to_file("res://scenes/world_list.tscn")

scripts/friends_presence_ui.gd

@@ -41,6 +41,12 @@ var _friend_presence_map: Dictionary = {} # user_id (int) -> {"status": String,
 
 
 func _ready() -> void:
+	if send_req_input:
+		send_req_input.placeholder_text = "Enter username or ID..."
+	if follow_input:
+		follow_input.placeholder_text = "Enter username or ID..."
+	if block_input:
+		block_input.placeholder_text = "Enter username or ID..."
 	_api_client = _get_api()
 	_wire_signals()
 	if _api_client != null and _api_client.has_token():
@@ -78,6 +84,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_message(text: String, is_error: bool = false) -> void:
 	if status_label:
 		status_label.text = text
@@ -254,7 +266,10 @@ func refresh_requests() -> void:
 		hbox.add_theme_constant_override("separation", 12)
 
 		var lbl := Label.new()
-		lbl.text = "Request from User #%d (%s)" % [from_id, created_at]
+		var sender_name: String = str(req.get("requester_username", ""))
+		if sender_name.is_empty():
+			sender_name = "User #%d" % from_id
+		lbl.text = "Request from %s (%s)" % [sender_name, created_at]
 		lbl.size_flags_horizontal = Control.SIZE_EXPAND_FILL
 		hbox.add_child(lbl)
 
@@ -292,13 +307,12 @@ func _on_decline_request(req_id: int) -> void:
 
 func _on_send_req_pressed() -> void:
 	var target_text := send_req_input.text.strip_edges()
-	if not target_text.is_valid_int():
-		show_message("Enter a valid integer user ID.", true)
+	if target_text.is_empty():
+		show_message("Enter a username or user ID.", true)
 		return
-	var target_id := int(target_text)
-	var res: Dictionary = await _api_client.send_friend_request(target_id)
+	var res: Dictionary = await _api_client.send_friend_request(target_text)
 	if res.ok:
-		show_message("Friend request sent to User #%d!" % target_id)
+		show_message("Friend request sent to %s!" % target_text)
 		send_req_input.text = ""
 	else:
 		show_message("Failed to send request: " + res.detail, true)
@@ -357,13 +371,12 @@ func _on_unfollow(uid: int) -> void:
 
 func _on_follow_pressed() -> void:
 	var target_text := follow_input.text.strip_edges()
-	if not target_text.is_valid_int():
-		show_message("Enter a valid integer user ID.", true)
+	if target_text.is_empty():
+		show_message("Enter a username or user ID.", true)
 		return
-	var target_id := int(target_text)
-	var res: Dictionary = await _api_client.follow_user(target_id)
+	var res: Dictionary = await _api_client.follow_user(target_text)
 	if res.ok:
-		show_message("Following User #%d." % target_id)
+		show_message("Following %s." % target_text)
 		follow_input.text = ""
 		refresh_following()
 	else:
@@ -423,13 +436,12 @@ func _on_unblock(uid: int) -> void:
 
 func _on_block_pressed() -> void:
 	var target_text := block_input.text.strip_edges()
-	if not target_text.is_valid_int():
-		show_message("Enter a valid integer user ID.", true)
+	if target_text.is_empty():
+		show_message("Enter a username or user ID.", true)
 		return
-	var target_id := int(target_text)
-	var res: Dictionary = await _api_client.block_user(target_id)
+	var res: Dictionary = await _api_client.block_user(target_text)
 	if res.ok:
-		show_message("Blocked User #%d." % target_id)
+		show_message("Blocked %s." % target_text)
 		block_input.text = ""
 		refresh_blocked()
 		refresh_friends()

scripts/game.gd

@@ -36,11 +36,15 @@ var _status_label: Label = null
 ## normal play"). Editing is in-memory only here; the save path to the
 ## backend is a sibling task (world_persistence_impl.md).
 const ReportModal = preload("res://scripts/report_modal.gd")
+const PauseMenu = preload("res://scripts/pause_menu.gd")
+const ControlsModal = preload("res://scripts/controls_modal.gd")
 
 var _build_editor: InGameEditor = null
 var _chat_overlay: Control = null
 var _friends_overlay: Control = null
 var _report_modal: Control = null
+var _pause_menu: Control = null
+var _controls_modal: Control = null
 var _hud_layer: CanvasLayer = null
 var _overlay_layer: CanvasLayer = null
 
@@ -51,13 +55,13 @@ var _loaded_chunk_coords: Array[Vector3i] = []
 
 func _ready() -> void:
 	_show_build_stamp()
+	_setup_in_game_hud()
+	_setup_chunk_streaming()
 	if Session.editing:
 		_open_editor_for_world()
 	else:
-		_setup_in_game_hud()
 		if Session.active:
 			_setup_networked()
-		_setup_chunk_streaming()
 
 
 func _setup_chunk_streaming() -> void:
@@ -175,26 +179,22 @@ func _hide_default_test_props() -> void:
 func _unhandled_input(event: InputEvent) -> void:
 	if event is InputEventKey and event.pressed and not event.echo:
 		if event.keycode == KEY_T or (event.keycode == KEY_ENTER and not (_chat_overlay != null and is_instance_valid(_chat_overlay))):
-			if not Session.editing and not (_build_editor != null and is_instance_valid(_build_editor)):
+			if not (_build_editor != null and is_instance_valid(_build_editor)) and not (_pause_menu != null and is_instance_valid(_pause_menu)):
 				get_viewport().set_input_as_handled()
 				_toggle_chat_overlay()
 				return
 		elif event.keycode == KEY_TAB or event.keycode == KEY_F1:
-			if not Session.editing and not (_build_editor != null and is_instance_valid(_build_editor)):
+			if not (_build_editor != null and is_instance_valid(_build_editor)) and not (_pause_menu != null and is_instance_valid(_pause_menu)):
 				get_viewport().set_input_as_handled()
 				_toggle_friends_overlay()
 				return
 
 	if event.is_action_pressed("toggle_build_mode"):
-		# world_persistence_impl.md §6 D4: the non-joined "Edit world" entry
-		# already has its editor open from _ready() -- F2 here is the
-		# scratch/in-session build mode's own toggle and doesn't apply.
-		if not Session.editing:
 		get_viewport().set_input_as_handled()
 		_toggle_build_mode()
 		return
 
-	# ESC leaves the world back to the browser (or closes an open overlay/editor).
+	# ESC opens Pause Menu (or closes open modal/overlay/editor).
 	if event.is_action_pressed("ui_cancel"):
 		get_viewport().set_input_as_handled()
 		if _report_modal != null and is_instance_valid(_report_modal):
@@ -203,21 +203,19 @@ func _unhandled_input(event: InputEvent) -> void:
 			_close_chat_overlay()
 		elif _friends_overlay != null and is_instance_valid(_friends_overlay):
 			_close_friends_overlay()
-		elif Session.editing:
-			# Non-joined editing has no play session to fall back into --
-			# closing it means leaving, same as the Close button.
-			_exit_editor_to_browser()
+		elif _controls_modal != null and is_instance_valid(_controls_modal):
+			_close_controls_modal()
+		elif _pause_menu != null and is_instance_valid(_pause_menu):
+			_close_pause_menu()
 		elif _build_editor != null and is_instance_valid(_build_editor):
 			_close_build_mode()
 		else:
-			_leave_world()
+			_open_pause_menu()
 
 
 # ─── In-Game HUD & Social Overlays ───────────────────────────────────────────
 
 func _setup_in_game_hud() -> void:
-	if Session.editing:
-		return
 	if _hud_layer != null and is_instance_valid(_hud_layer):
 		return
 	_hud_layer = CanvasLayer.new()
@@ -274,13 +272,69 @@ func _setup_in_game_hud() -> void:
 			_close_chat_overlay()
 		elif _friends_overlay != null and is_instance_valid(_friends_overlay):
 			_close_friends_overlay()
+		elif _controls_modal != null and is_instance_valid(_controls_modal):
+			_close_controls_modal()
+		elif _pause_menu != null and is_instance_valid(_pause_menu):
+			_close_pause_menu()
 		elif _build_editor != null and is_instance_valid(_build_editor):
 			_close_build_mode()
 		else:
-			_leave_world()
+			_open_pause_menu()
 	)
 	bar.add_child(exit_btn)
 
+	# Bottom controls pill hint
+	var controls_pill := PanelContainer.new()
+	controls_pill.name = "ControlsPill"
+	var pill_style := StyleBoxFlat.new()
+	pill_style.bg_color = Color(0.08, 0.10, 0.14, 0.75)
+	pill_style.set_corner_radius_all(14)
+	pill_style.content_margin_left = 14
+	pill_style.content_margin_right = 14
+	pill_style.content_margin_top = 4
+	pill_style.content_margin_bottom = 4
+	controls_pill.add_theme_stylebox_override("panel", pill_style)
+	controls_pill.set_anchors_preset(Control.PRESET_BOTTOM_WIDE)
+	controls_pill.offset_top = -34
+	controls_pill.offset_bottom = -8
+	controls_pill.offset_left = 220
+	controls_pill.offset_right = -220
+
+	var hint_lbl := Label.new()
+	hint_lbl.text = "[W][A][S][D] Move   [Space] Jump   [E] Interact   [F1] Friends   [T] Chat   [F2] Build   [ESC] Menu"
+	hint_lbl.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	hint_lbl.add_theme_font_size_override("font_size", 12)
+	hint_lbl.add_theme_color_override("font_color", Color(0.85, 0.9, 0.95, 0.85))
+	controls_pill.add_child(hint_lbl)
+	_hud_layer.add_child(controls_pill)
+
+	# If editing in creator test mode, show status badge
+	if Session.editing and Session.world_id != null and int(Session.world_id) > 0:
+		var creator_pill := PanelContainer.new()
+		creator_pill.name = "CreatorTestPill"
+		var c_style := StyleBoxFlat.new()
+		c_style.bg_color = Color(0.18, 0.14, 0.04, 0.85)
+		c_style.border_color = Color(0.9, 0.75, 0.2, 0.9)
+		c_style.set_border_width_all(1)
+		c_style.set_corner_radius_all(6)
+		c_style.content_margin_left = 10
+		c_style.content_margin_right = 10
+		c_style.content_margin_top = 4
+		c_style.content_margin_bottom = 4
+		creator_pill.add_theme_stylebox_override("panel", c_style)
+		creator_pill.set_anchors_preset(Control.PRESET_TOP_RIGHT)
+		creator_pill.offset_left = -280
+		creator_pill.offset_top = 16
+		creator_pill.offset_right = -20
+		creator_pill.offset_bottom = 46
+
+		var creator_lbl := Label.new()
+		creator_lbl.text = "🛠️ Creator Test Mode (World #%s)" % str(Session.world_id)
+		creator_lbl.add_theme_font_size_override("font_size", 12)
+		creator_lbl.add_theme_color_override("font_color", Color(1.0, 0.9, 0.4))
+		creator_pill.add_child(creator_lbl)
+		_hud_layer.add_child(creator_pill)
+
 
 func _toggle_report_modal() -> void:
 	if _report_modal != null and is_instance_valid(_report_modal):
@@ -451,6 +505,90 @@ func _close_friends_overlay() -> void:
 	_player._refresh_mouse_mode()
 
 
+func _toggle_pause_menu() -> void:
+	if _pause_menu != null and is_instance_valid(_pause_menu):
+		_close_pause_menu()
+	else:
+		_open_pause_menu()
+
+
+func _open_pause_menu() -> void:
+	if _chat_overlay != null and is_instance_valid(_chat_overlay):
+		_close_chat_overlay()
+	if _friends_overlay != null and is_instance_valid(_friends_overlay):
+		_close_friends_overlay()
+	if _controls_modal != null and is_instance_valid(_controls_modal):
+		_close_controls_modal()
+
+	Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
+	_player.set_physics_process(false)
+	_player.set_process_unhandled_input(false)
+
+	if _overlay_layer == null or not is_instance_valid(_overlay_layer):
+		_overlay_layer = CanvasLayer.new()
+		_overlay_layer.name = "OverlayLayer"
+		_overlay_layer.layer = 20
+		add_child(_overlay_layer)
+
+	var can_edit := Session.editing or (Session.world_id != null and int(Session.world_id) > 0)
+	var title_str := "World #%s" % str(Session.world_id) if Session.world_id != null and int(Session.world_id) > 0 else "Sandbox World"
+	_pause_menu = PauseMenu.new(can_edit, title_str)
+	_pause_menu.resume_requested.connect(_close_pause_menu)
+	_pause_menu.edit_world_requested.connect(func():
+		_close_pause_menu()
+		_open_build_mode()
+	)
+	_pause_menu.friends_requested.connect(func():
+		_close_pause_menu()
+		_open_friends_overlay()
+	)
+	_pause_menu.chat_requested.connect(func():
+		_close_pause_menu()
+		_open_chat_overlay()
+	)
+	_pause_menu.controls_requested.connect(func():
+		_open_controls_modal()
+	)
+	_pause_menu.leave_world_confirmed.connect(func():
+		_close_pause_menu()
+		_leave_world()
+	)
+	_overlay_layer.add_child(_pause_menu)
+
+
+func _close_pause_menu() -> void:
+	if _pause_menu != null and is_instance_valid(_pause_menu):
+		_pause_menu.queue_free()
+	_pause_menu = null
+	if _controls_modal != null and is_instance_valid(_controls_modal):
+		_controls_modal.queue_free()
+		_controls_modal = null
+	if _overlay_layer != null and is_instance_valid(_overlay_layer):
+		_overlay_layer.queue_free()
+		_overlay_layer = null
+
+	_player.set_physics_process(true)
+	_player.set_process_unhandled_input(true)
+	_player._refresh_mouse_mode()
+
+
+func _open_controls_modal() -> void:
+	if _controls_modal != null and is_instance_valid(_controls_modal):
+		return
+	_controls_modal = ControlsModal.new()
+	_controls_modal.closed.connect(_close_controls_modal)
+	if _overlay_layer != null and is_instance_valid(_overlay_layer):
+		_overlay_layer.add_child(_controls_modal)
+	else:
+		add_child(_controls_modal)
+
+
+func _close_controls_modal() -> void:
+	if _controls_modal != null and is_instance_valid(_controls_modal):
+		_controls_modal.queue_free()
+		_controls_modal = null
+
+
 ## Entry point into the in-game editor (docs/architecture/editor.md §7.2).
 ## Freezes the player and opens a fresh, empty in-memory chunk to edit --
 ## loading a *real* chunk from the backend for editing is the sibling
@@ -507,6 +645,7 @@ func _open_build_mode() -> void:
 		_build_editor.setup_persistence(save_service, world_id_str, room_slug, coord, base_revision)
 
 	_build_editor.closed.connect(_close_build_mode)
+	_build_editor.exit_browser_requested.connect(_exit_editor_to_browser)
 	add_child(_build_editor)
 
 
@@ -578,7 +717,8 @@ func _open_editor_for_world() -> void:
 
 	_build_editor = InGameEditor.new(core)
 	_build_editor.setup_persistence(save_service, world_id_str, room_slug, coord, base_revision)
-	_build_editor.closed.connect(_exit_editor_to_browser)
+	_build_editor.closed.connect(_close_build_mode)
+	_build_editor.exit_browser_requested.connect(_exit_editor_to_browser)
 	add_child(_build_editor)
 
 
@@ -728,13 +868,23 @@ func _sync_remotes(states: Dictionary, delta: float) -> void:
 		var st: Dictionary = states[pid]
 		var node: Node3D = _remotes.get(pid)
 		var loadout: Variant = st.get("loadout", null)
+		var uname: String = str(st.get("username", ""))
+		if uname.is_empty() and loadout is Dictionary:
+			uname = str(loadout.get("username", ""))
+		if uname.is_empty():
+			uname = "Player %d" % pid
+
 		if node == null:
-			node = _make_remote(pid, loadout)
+			node = _make_remote(pid, loadout, uname)
 			_remotes[pid] = node
 			add_child(node)
 			node.global_position = st.get("position", Vector3.ZERO)
-		elif loadout is Dictionary and not (loadout as Dictionary).is_empty() and _remote_loadouts.get(pid) != loadout:
+		else:
+			if loadout is Dictionary and not (loadout as Dictionary).is_empty() and _remote_loadouts.get(pid) != loadout:
 				_setup_remote_visual(node, pid, loadout)
+			var tag := node.get_node_or_null("NameTag") as Label3D
+			if tag != null and tag.text != uname and not uname.is_empty():
+				tag.text = uname
 
 		var target: Vector3 = st.get("position", node.global_position)
 		node.global_position = node.global_position.lerp(target, clampf(REMOTE_LERP * delta, 0.0, 1.0))
@@ -756,7 +906,7 @@ func _sync_remotes(states: Dictionary, delta: float) -> void:
 			_remote_loadouts.erase(pid)
 
 
-func _make_remote(pid: int, loadout: Variant = null) -> Node3D:
+func _make_remote(pid: int, loadout: Variant = null, uname: String = "") -> Node3D:
 	var root := Node3D.new()
 	root.name = "Remote_%d" % pid
 
@@ -764,7 +914,7 @@ func _make_remote(pid: int, loadout: Variant = null) -> Node3D:
 
 	var tag := Label3D.new()
 	tag.name = "NameTag"
-	tag.text = "Player %d" % pid
+	tag.text = uname if not uname.is_empty() else ("Player %d" % pid)
 	tag.position = Vector3(0, 2.1, 0)
 	tag.billboard = BaseMaterial3D.BILLBOARD_ENABLED
 	tag.no_depth_test = true

scripts/groups_ui.gd

@@ -89,6 +89,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_message(text: String, is_error: bool = false) -> void:
 	if status_label:
 		status_label.text = text

scripts/main_menu.gd

@@ -52,6 +52,7 @@ var _quit_button: Button
 
 var _is_register_mode: bool = false
 var _is_authenticating: bool = false
+var _sign_out_button: Button = null
 
 
 # ─── Lifecycle ────────────────────────────────────────────────────────────────
@@ -112,6 +113,18 @@ func _ready() -> void:
 	)
 	add_child(fs_btn)
 
+	var ctrl_btn := Button.new()
+	ctrl_btn.name = "ControlsButton"
+	ctrl_btn.set_anchors_preset(Control.PRESET_TOP_RIGHT)
+	ctrl_btn.offset_left = -300
+	ctrl_btn.offset_top = 10
+	ctrl_btn.offset_right = -170
+	ctrl_btn.offset_bottom = 38
+	ctrl_btn.text = "⌨️ Controls"
+	ctrl_btn.add_theme_font_size_override("font_size", 12)
+	ctrl_btn.pressed.connect(_on_controls_button_pressed)
+	add_child(ctrl_btn)
+
 	# Cache node references.
 	_auth_buttons_row = $CenterContainer/VBoxContainer/AuthButtonsRow
 	_login_button = $CenterContainer/VBoxContainer/AuthButtonsRow/LoginButton
@@ -121,6 +134,8 @@ func _ready() -> void:
 	_username_edit = $CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/UsernameEdit
 	_password_edit = $CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/PasswordEdit
 	_email_edit = $CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/EmailEdit
+	if _email_edit and not _email_edit.text_submitted.is_connected(_on_auth_button_pressed):
+		_email_edit.text_submitted.connect(_on_auth_button_pressed)
 	_over_18_check = $CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/Over18Check
 	_auth_button = $CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/AuthButton
 	_status_label = $CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox/AuthStatusLabel
@@ -198,6 +213,15 @@ func _show_authenticated(username: String) -> void:
 	_auth_mode_label.visible = false
 	_set_nav_enabled(true)
 	_auth_buttons_row.visible = false
+	if _sign_out_button == null or not is_instance_valid(_sign_out_button):
+		_sign_out_button = Button.new()
+		_sign_out_button.name = "SignOutButton"
+		_sign_out_button.text = "Sign Out"
+		_sign_out_button.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
+		_sign_out_button.add_theme_font_size_override("font_size", 12)
+		_sign_out_button.pressed.connect(_on_sign_out_pressed)
+		$CenterContainer/VBoxContainer/AuthPanel/MarginContainer/AuthVBox.add_child(_sign_out_button)
+	_sign_out_button.visible = true
 	print("Restored authenticated session for: ", username)
 
 
@@ -207,6 +231,8 @@ func _reset_to_logged_out() -> void:
 	_auth_panel.visible = false
 	_status_label.visible = false
 	_welcome_label.visible = false
+	if _sign_out_button != null and is_instance_valid(_sign_out_button):
+		_sign_out_button.visible = false
 	_email_edit.visible = false
 	_over_18_check.visible = false
 	_over_18_check.button_pressed = true
@@ -214,6 +240,13 @@ func _reset_to_logged_out() -> void:
 	_update_auth_mode_ui()
 
 
+func _on_sign_out_pressed() -> void:
+	ApiClient.clear_token()
+	_reset_to_logged_out()
+	_auth_buttons_row.visible = true
+	_clear_status()
+
+
 # ─── Navigation ───────────────────────────────────────────────────────────────
 
 func _on_discover_button_pressed() -> void:
@@ -313,7 +346,7 @@ func _update_auth_mode_ui() -> void:
 
 # ─── Auth submission ──────────────────────────────────────────────────────────
 
-func _on_auth_button_pressed() -> void:
+func _on_auth_button_pressed(_text: String = "") -> void:
 	"""Handle login or register button press."""
 	if _is_authenticating:
 		return
@@ -428,3 +461,23 @@ func _show_status(message: String) -> void:
 func _clear_status() -> void:
 	_status_label.text = ""
 	_status_label.visible = false
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		if has_node("ControlsModal"):
+			get_node("ControlsModal").queue_free()
+			get_viewport().set_input_as_handled()
+			return
+		if _auth_panel != null and _auth_panel.visible and not ApiClient.has_token():
+			_auth_panel.visible = false
+			_auth_buttons_row.visible = true
+			_clear_status()
+			get_viewport().set_input_as_handled()
+
+
+func _on_controls_button_pressed() -> void:
+	if has_node("ControlsModal"):
+		return
+	var modal := preload("res://scripts/controls_modal.gd").new()
+	add_child(modal)

scripts/marketplace_ui.gd

@@ -30,6 +30,10 @@ signal item_purchased(listing_id: int)
 
 var _api_client: Node = null
 
+var AudioManager: Node:
+	get:
+		return get_node_or_null("/root/AudioManager")
+
 
 func _ready() -> void:
 	_api_client = _get_api()
@@ -73,6 +77,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_status(text: String, is_error: bool = false) -> void:
 	if not status_label:
 		return
@@ -226,6 +236,7 @@ func _on_buy_clicked(listing_id: int, item_name: String, price: int) -> void:
 	show_status("Purchasing '%s' for %d Buffalo Chips..." % [item_name, price])
 	var res: Dictionary = await EconomyApiClient.purchase_listing(api, listing_id)
 	if res.ok:
+		AudioManager.play_coin()
 		show_status("Successfully purchased '%s'! Item added to inventory." % item_name)
 		item_purchased.emit(listing_id)
 		refresh_all()

scripts/network_client.gd

@@ -101,6 +101,19 @@ func _on_connected() -> void:
 	_server_root.add_child(_player_proxy)
 
 	connected_to_server.emit()
+	if pending_loadout.is_empty():
+		var api := _get_api_client()
+		var cur_username: String = ""
+		var cur_user_id: int = 0
+		if api != null:
+			cur_username = str(api.get("current_username"))
+			cur_user_id = int(api.get("current_user_id"))
+		if not cur_username.is_empty():
+			var default_loadout: Dictionary = {"username": cur_username}
+			if cur_user_id > 0:
+				default_loadout["user_id"] = cur_user_id
+			pending_loadout = default_loadout
+
 	if not pending_loadout.is_empty():
 		_player_proxy.rpc_id(1, "rpc_set_loadout", pending_loadout)
 
@@ -266,7 +279,30 @@ func send_input(move_x: float, move_z: float, jump: bool, look_yaw: float) -> vo
 ## Send the local player's avatar loadout to the server so it can be replicated
 ## to other clients.
 func send_loadout(loadout_dict: Dictionary) -> void:
-	pending_loadout = loadout_dict.duplicate(true)
+	var copy: Dictionary = loadout_dict.duplicate(true)
+	var api := _get_api_client()
+	var cur_username: String = ""
+	var cur_user_id: int = 0
+	if api != null:
+		cur_username = str(api.get("current_username"))
+		cur_user_id = int(api.get("current_user_id"))
+
+	if not copy.has("username"):
+		if not cur_username.is_empty():
+			copy["username"] = cur_username
+		else:
+			copy["username"] = "Player_%d" % my_peer_id
+
+	if cur_user_id > 0 and not copy.has("user_id"):
+		copy["user_id"] = cur_user_id
+
+	pending_loadout = copy
 	if _player_proxy and is_instance_valid(_player_proxy):
 		_player_proxy.rpc_id(1, "rpc_set_loadout", pending_loadout)
 
+
+func _get_api_client() -> Node:
+	if has_node("/root/ApiClient"):
+		return get_node("/root/ApiClient")
+	return null
+

scripts/pause_menu.gd

@@ -0,0 +1,188 @@
+class_name PauseMenu
+extends Control
+## In-game Pause & System Menu overlay.
+##
+## Provides resume, settings, controls guide, and safe exit confirmation.
+
+signal resume_requested
+signal edit_world_requested
+signal friends_requested
+signal chat_requested
+signal controls_requested
+signal leave_world_confirmed
+
+var can_edit: bool = false
+var world_title: String = "World"
+
+var _confirm_box: VBoxContainer
+var _main_menu_vbox: VBoxContainer
+var _fs_button: Button
+
+
+func _init(p_can_edit: bool = false, p_world_title: String = "World") -> void:
+	name = "PauseMenu"
+	can_edit = p_can_edit
+	world_title = p_world_title
+	set_anchors_preset(Control.PRESET_FULL_RECT)
+
+
+func _ready() -> void:
+	mouse_filter = Control.MOUSE_FILTER_STOP
+
+	# Dark semi-transparent background
+	var bg := ColorRect.new()
+	bg.color = Color(0.05, 0.07, 0.10, 0.85)
+	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
+	add_child(bg)
+
+	var center := CenterContainer.new()
+	center.set_anchors_preset(Control.PRESET_FULL_RECT)
+	add_child(center)
+
+	var panel := PanelContainer.new()
+	panel.custom_minimum_size = Vector2(400, 0)
+	var style := StyleBoxFlat.new()
+	style.bg_color = Color(0.12, 0.14, 0.18, 0.98)
+	style.border_color = Color(0.35, 0.45, 0.65, 1.0)
+	style.set_border_width_all(2)
+	style.set_corner_radius_all(10)
+	style.content_margin_left = 28
+	style.content_margin_right = 28
+	style.content_margin_top = 24
+	style.content_margin_bottom = 24
+	panel.add_theme_stylebox_override("panel", style)
+	center.add_child(panel)
+
+	var root_vbox := VBoxContainer.new()
+	root_vbox.add_theme_constant_override("separation", 16)
+	panel.add_child(root_vbox)
+
+	# Title & World info
+	var header_vbox := VBoxContainer.new()
+	header_vbox.add_theme_constant_override("separation", 4)
+	root_vbox.add_child(header_vbox)
+
+	var title := Label.new()
+	title.text = "PAUSED"
+	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	title.add_theme_font_size_override("font_size", 28)
+	title.add_theme_color_override("font_color", Color(1.0, 1.0, 1.0))
+	header_vbox.add_child(title)
+
+	var subtitle := Label.new()
+	subtitle.text = world_title
+	subtitle.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	subtitle.add_theme_font_size_override("font_size", 14)
+	subtitle.add_theme_color_override("font_color", Color(0.65, 0.75, 0.9))
+	header_vbox.add_child(subtitle)
+
+	# Main action buttons
+	_main_menu_vbox = VBoxContainer.new()
+	_main_menu_vbox.add_theme_constant_override("separation", 10)
+	root_vbox.add_child(_main_menu_vbox)
+
+	var resume_btn := _make_menu_btn("▶  Resume Game (ESC)", _on_resume_pressed, Color(0.4, 0.9, 0.5))
+	_main_menu_vbox.add_child(resume_btn)
+
+	if can_edit:
+		var edit_btn := _make_menu_btn("🛠️  Creator Studio / Edit World (F2)", func(): edit_world_requested.emit())
+		_main_menu_vbox.add_child(edit_btn)
+
+	var friends_btn := _make_menu_btn("👥  Friends & Social (F1)", func(): friends_requested.emit())
+	_main_menu_vbox.add_child(friends_btn)
+
+	var chat_btn := _make_menu_btn("💬  Chat (T / Enter)", func(): chat_requested.emit())
+	_main_menu_vbox.add_child(chat_btn)
+
+	var controls_btn := _make_menu_btn("⌨️  Controls & Keybindings", func(): controls_requested.emit())
+	_main_menu_vbox.add_child(controls_btn)
+
+	_fs_button = _make_menu_btn("⛶  Toggle Fullscreen (F11)", _on_toggle_fs)
+	_update_fs_label()
+	_main_menu_vbox.add_child(_fs_button)
+
+	var leave_btn := _make_menu_btn("🚪  Leave World", _on_prompt_leave, Color(1.0, 0.45, 0.45))
+	_main_menu_vbox.add_child(leave_btn)
+
+	# Confirmation Box (hidden initially)
+	_confirm_box = VBoxContainer.new()
+	_confirm_box.visible = false
+	_confirm_box.add_theme_constant_override("separation", 14)
+	root_vbox.add_child(_confirm_box)
+
+	var confirm_msg := Label.new()
+	confirm_msg.text = "Are you sure you want to leave this world?\nAny unsaved changes will be lost."
+	confirm_msg.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	confirm_msg.autowrap_mode = TextServer.AUTOWRAP_WORD
+	confirm_msg.add_theme_font_size_override("font_size", 14)
+	confirm_msg.add_theme_color_override("font_color", Color(1.0, 0.85, 0.85))
+	_confirm_box.add_child(confirm_msg)
+
+	var confirm_btns := HBoxContainer.new()
+	confirm_btns.alignment = BoxContainer.ALIGNMENT_CENTER
+	confirm_btns.add_theme_constant_override("separation", 16)
+	_confirm_box.add_child(confirm_btns)
+
+	var cancel_leave_btn := Button.new()
+	cancel_leave_btn.text = "Stay in World"
+	cancel_leave_btn.custom_minimum_size = Vector2(130, 36)
+	cancel_leave_btn.pressed.connect(_on_cancel_leave)
+	confirm_btns.add_child(cancel_leave_btn)
+
+	var confirm_leave_btn := Button.new()
+	confirm_leave_btn.text = "Confirm Leave"
+	confirm_leave_btn.custom_minimum_size = Vector2(130, 36)
+	confirm_leave_btn.add_theme_color_override("font_color", Color(1.0, 0.4, 0.4))
+	confirm_leave_btn.pressed.connect(func(): leave_world_confirmed.emit())
+	confirm_btns.add_child(confirm_leave_btn)
+
+
+func _make_menu_btn(label: String, callback: Callable, color: Color = Color.WHITE) -> Button:
+	var btn := Button.new()
+	btn.text = label
+	btn.custom_minimum_size = Vector2(0, 38)
+	if color != Color.WHITE:
+		btn.add_theme_color_override("font_color", color)
+	btn.pressed.connect(callback)
+	return btn
+
+
+func _on_resume_pressed() -> void:
+	resume_requested.emit()
+
+
+func _on_toggle_fs() -> void:
+	Session.toggle_fullscreen()
+	_update_fs_label()
+
+
+func _update_fs_label() -> void:
+	if _fs_button == null:
+		return
+	if DisplayServer.get_name() == "headless":
+		_fs_button.text = "⛶  Toggle Fullscreen (F11)"
+		return
+	var m := DisplayServer.window_get_mode()
+	if m == DisplayServer.WINDOW_MODE_FULLSCREEN or m == DisplayServer.WINDOW_MODE_EXCLUSIVE_FULLSCREEN:
+		_fs_button.text = "🗗  Windowed Mode (F11)"
+	else:
+		_fs_button.text = "⛶  Fullscreen Mode (F11)"
+
+
+func _on_prompt_leave() -> void:
+	_main_menu_vbox.visible = false
+	_confirm_box.visible = true
+
+
+func _on_cancel_leave() -> void:
+	_confirm_box.visible = false
+	_main_menu_vbox.visible = true
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		if _confirm_box.visible:
+			_on_cancel_leave()
+		else:
+			_on_resume_pressed()

scripts/player_spawner.gd

@@ -25,6 +25,9 @@ var last_applied_seq: int = 0
 ## Replicated avatar loadout (base_body, slots, skin_tone).
 var loadout: Dictionary = {}
 
+var username: String = ""
+var user_id: int = 0
+
 ## Queue of {seq:int, move_x:float, move_z:float, jump:bool, look_yaw:float}
 ## appended by rpc_request_input, drained each physics frame.
 var _input_queue: Array[Dictionary] = []
@@ -80,6 +83,8 @@ func get_server_state() -> Dictionary:
 		"velocity": velocity,
 		"on_floor": is_on_floor(),
 		"loadout": loadout,
+		"username": username,
+		"user_id": user_id,
 	}
 
 
@@ -95,3 +100,7 @@ func rpc_set_loadout(p_loadout: Dictionary) -> void:
 	var sender := multiplayer.get_remote_sender_id()
 	if sender == peer_id or sender == 1 or sender == 0:
 		loadout = p_loadout.duplicate(true)
+		if p_loadout.has("username") and p_loadout["username"] is String:
+			username = p_loadout["username"]
+		if p_loadout.has("user_id"):
+			user_id = int(p_loadout["user_id"])

scripts/profile_ui.gd

@@ -94,6 +94,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_message(text: String, is_error: bool = false) -> void:
 	if status_label:
 		status_label.text = text

scripts/report_modal.gd

@@ -174,3 +174,10 @@ func _on_submit_pressed() -> void:
 		report_submitted.emit(target_type, target_id)
 		await get_tree().create_timer(1.0).timeout
 		queue_free()
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		closed.emit()
+		queue_free()

scripts/selling_payout_ui.gd

@@ -35,6 +35,10 @@ signal back_requested
 
 var _api_client: Node = null
 
+var AudioManager: Node:
+	get:
+		return get_node_or_null("/root/AudioManager")
+
 
 func _ready() -> void:
 	_api_client = _get_api()
@@ -76,6 +80,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_status(text: String, is_error: bool = false) -> void:
 	if not status_label:
 		return
@@ -269,6 +279,7 @@ func _on_request_payout_pressed() -> void:
 	show_status("Submitting payout request for %d Buffalo Chips..." % amount)
 	var res: Dictionary = await EconomyApiClient.request_payout(api, amount, dest)
 	if res.ok:
+		AudioManager.play_coin()
 		show_status("Payout request for %d Buffalo Chips submitted successfully!" % amount)
 		if payout_amount_input: payout_amount_input.text = ""
 		if payout_dest_input: payout_dest_input.text = ""

scripts/smoke_test_audio_manager.gd

@@ -0,0 +1,125 @@
+extends SceneTree
+## Headless smoke test for AudioManager autoload.
+
+func _initialize() -> void:
+	_run()
+
+
+func _run() -> void:
+	await process_frame
+
+	print("SMOKE: Starting AudioManager verification...")
+	var audio_mgr := root.get_node_or_null("AudioManager")
+	if audio_mgr == null:
+		printerr("FAIL: AudioManager node not found in root")
+		quit(1)
+		return
+	print("PASS: AudioManager autoload exists in scene tree.")
+
+	# 1. Verify streams are valid AudioStream objects
+	var streams := [
+		["STREAM_CLICK", audio_mgr.STREAM_CLICK],
+		["STREAM_COIN", audio_mgr.STREAM_COIN],
+		["STREAM_CHIME", audio_mgr.STREAM_CHIME],
+		["STREAM_FANFARE", audio_mgr.STREAM_FANFARE],
+		["STREAM_BELL", audio_mgr.STREAM_BELL],
+		["STREAM_DOOR", audio_mgr.STREAM_DOOR],
+	]
+	for s in streams:
+		var name_str: String = s[0]
+		var stream_obj: Variant = s[1]
+		if not (stream_obj is AudioStream):
+			printerr("FAIL: %s is not an AudioStream" % name_str)
+			quit(1)
+			return
+		print("PASS: %s is a valid AudioStream." % name_str)
+
+	# 2. Verify pool size is 16
+	if audio_mgr.pool_size != 16:
+		printerr("FAIL: Expected pool size 16, got %d" % audio_mgr.pool_size)
+		quit(1)
+		return
+	print("PASS: Pool size is 16.")
+
+	# 3. Call sound helpers
+	var p1: AudioStreamPlayer = audio_mgr.play_click()
+	if p1 == null or not (p1 is AudioStreamPlayer):
+		printerr("FAIL: play_click() did not return an AudioStreamPlayer")
+		quit(1)
+		return
+
+	var p2: AudioStreamPlayer = audio_mgr.play_coin()
+	if p2 == null or not (p2 is AudioStreamPlayer):
+		printerr("FAIL: play_coin() did not return an AudioStreamPlayer")
+		quit(1)
+		return
+
+	var p3: AudioStreamPlayer = audio_mgr.play_chime()
+	if p3 == null or not (p3 is AudioStreamPlayer):
+		printerr("FAIL: play_chime() did not return an AudioStreamPlayer")
+		quit(1)
+		return
+
+	var p4: AudioStreamPlayer = audio_mgr.play_fanfare()
+	if p4 == null or not (p4 is AudioStreamPlayer):
+		printerr("FAIL: play_fanfare() did not return an AudioStreamPlayer")
+		quit(1)
+		return
+
+	var p5: AudioStreamPlayer = audio_mgr.play_bell()
+	if p5 == null or not (p5 is AudioStreamPlayer):
+		printerr("FAIL: play_bell() did not return an AudioStreamPlayer")
+		quit(1)
+		return
+
+	var p6: AudioStreamPlayer = audio_mgr.play_door()
+	if p6 == null or not (p6 is AudioStreamPlayer):
+		printerr("FAIL: play_door() did not return an AudioStreamPlayer")
+		quit(1)
+		return
+	print("PASS: All 6 sound helper methods executed and returned players.")
+
+	# 4. Fire 20 rapid sounds to verify round-robin recycling
+	var player_order: Array[AudioStreamPlayer] = []
+	for i in range(20):
+		var p: AudioStreamPlayer = audio_mgr.play_click()
+		if p == null:
+			printerr("FAIL: Rapid sound #%d returned null" % i)
+			quit(1)
+			return
+		player_order.append(p)
+
+	if player_order[16] != player_order[0]:
+		printerr("FAIL: Player at index 16 is not recycled player at index 0")
+		quit(1)
+		return
+	if player_order[17] != player_order[1]:
+		printerr("FAIL: Player at index 17 is not recycled player at index 1")
+		quit(1)
+		return
+	if player_order[18] != player_order[2]:
+		printerr("FAIL: Player at index 18 is not recycled player at index 2")
+		quit(1)
+		return
+	if player_order[19] != player_order[3]:
+		printerr("FAIL: Player at index 19 is not recycled player at index 3")
+		quit(1)
+		return
+	print("PASS: 20 rapid sounds verified round-robin recycling.")
+
+	# 5. Verify universal tactile button click hook
+	var btn := Button.new()
+	btn.text = "Test Button"
+	root.add_child(btn)
+	await process_frame
+	btn.emit_signal("pressed")
+
+	# Button in no_click_sound group
+	var silent_btn := Button.new()
+	silent_btn.add_to_group("no_click_sound")
+	root.add_child(silent_btn)
+	await process_frame
+	silent_btn.emit_signal("pressed")
+
+	print("SMOKE RESULT: PASS")
+	quit(0)

scripts/smoke_test_avatar_studio_ui.gd

@@ -0,0 +1,298 @@
+extends SceneTree
+## Smoke test for redesigned AvatarCustomizationUI (Tasks 680b6e91d699 & f87183b6d9e4).
+##
+## Verifies:
+## 1. Header Bar: Back button (< Back [ESC], Vector2(120, 38)), Title ("Avatar Studio"),
+##    Live Buffalo Chips balance label ("Wallet: %d Buffalo Chips"), Status pill ("All changes saved").
+## 2. Category Tabs: Tab 0 "Body & Head", Tab 1 "Clothing", Tab 2 "Accessories", Tab 3 "Skin & Colors".
+## 3. Human-friendly item names (display_name lookup, no raw IDs like hair_mohawk_01 as primary title).
+## 4. Equipped badges ("✓ EQUIPPED") and highlighted borders on equipped items.
+## 5. Skin & Colors presets, shading slider, and custom RGB sliders.
+## 6. Preview Camera Zoom & Framing Presets:
+##    - Presets: "Full Body" (3.5, 0.98), "Head" (1.6, 1.62), "Torso" (2.2, 1.12), "Feet" (1.8, 0.35).
+##    - Zoom clamping: [1.5, 4.5].
+##    - Mouse-wheel zoom events.
+##    - Camera controls bar with preset buttons, zoom slider, and +/- buttons.
+## 7. Auto-Save on Exit:
+##    - user://loadout.json written.
+##    - AvatarSystem sync.
+##    - Signals: back_requested and closed.
+
+const AvatarCustomizationUI := preload("res://scripts/avatar/avatar_customization_ui.gd")
+const AvatarLoadout := preload("res://scripts/avatar/avatar_loadout.gd")
+
+var passed := 0
+var failed := 0
+
+
+func _initialize() -> void:
+	_run()
+
+
+func _run() -> void:
+	await process_frame
+
+	print("SMOKE: Starting AvatarStudioUI verification...")
+
+	var ui: AvatarCustomizationUI = AvatarCustomizationUI.new()
+	ui.name = "AvatarCustomizationUI"
+	ui.set_anchors_preset(Control.PRESET_FULL_RECT)
+	root.add_child(ui)
+
+	await process_frame
+	await process_frame
+
+	# 1. Header Bar Verification
+	var back_btn: Button = ui.find_child("BackButton", true, false) as Button
+	_check("Back button exists", back_btn != null)
+	if back_btn:
+		_check("Back button text is '< Back [ESC]'", back_btn.text == "< Back [ESC]")
+		_check("Back button custom_minimum_size is at least (120, 38)",
+			back_btn.custom_minimum_size.x >= 120 and back_btn.custom_minimum_size.y >= 38)
+
+	var title_lbl: Label = ui.find_child("TitleLabel", true, false) as Label
+	_check("TitleLabel exists", title_lbl != null)
+	if title_lbl:
+		_check("TitleLabel text is 'Avatar Studio'", title_lbl.text == "Avatar Studio")
+		var fsize: int = title_lbl.get_theme_font_size("font_size")
+		_check("TitleLabel font_size >= 24", fsize >= 24)
+
+	var status_pill: Label = ui.find_child("StatusPill", true, false) as Label
+	_check("StatusPill exists", status_pill != null)
+	if status_pill:
+		_check("StatusPill text is 'All changes saved'", status_pill.text == "All changes saved")
+
+	var wallet_lbl: Label = ui.find_child("WalletBalanceLabel", true, false) as Label
+	_check("WalletBalanceLabel exists", wallet_lbl != null)
+	if wallet_lbl:
+		_check("WalletBalanceLabel starts with 'Wallet:' and contains 'Buffalo Chips'",
+			wallet_lbl.text.begins_with("Wallet:") and wallet_lbl.text.contains("Buffalo Chips"))
+		ui.update_wallet_balance(750)
+		_check("WalletBalanceLabel formats 'Wallet: 750 Buffalo Chips'",
+			wallet_lbl.text == "Wallet: 750 Buffalo Chips")
+
+	# 2. Category Tabs Verification
+	var tab_bar: TabBar = ui.find_child("CategoryTabBar", true, false) as TabBar
+	_check("CategoryTabBar exists", tab_bar != null)
+	if tab_bar:
+		_check("CategoryTabBar has 4 tabs", tab_bar.tab_count == 4)
+		_check("Tab 0 is 'Body & Head'", tab_bar.get_tab_title(0) == "Body & Head")
+		_check("Tab 1 is 'Clothing'", tab_bar.get_tab_title(1) == "Clothing")
+		_check("Tab 2 is 'Accessories'", tab_bar.get_tab_title(2) == "Accessories")
+		_check("Tab 3 is 'Skin & Colors'", tab_bar.get_tab_title(3) == "Skin & Colors")
+
+	# Check Category constants
+	_check("Category 0 has slots: base_body, head, hair, face",
+		ui.CATEGORIES[0]["slots"] == ["base_body", "head", "hair", "face"])
+	_check("Category 1 has slots: chest, pants, torso, left_foot, left_hand",
+		ui.CATEGORIES[1]["slots"] == ["chest", "pants", "torso", "left_foot", "left_hand"])
+	_check("Category 2 has slots: back, accessory",
+		ui.CATEGORIES[2]["slots"] == ["back", "accessory"])
+
+	# 3. Friendly Item Names Verification
+	var mohawk_name: String = ui.get_friendly_item_name("hair_mohawk_01")
+	_check("hair_mohawk_01 friendly name is 'Mohawk'", mohawk_name == "Mohawk")
+	var cyber_name: String = ui.get_friendly_item_name("head_cyber_01")
+	_check("head_cyber_01 friendly name is 'Cyber Head'", cyber_name == "Cyber Head")
+	var cargo_name: String = ui.get_friendly_item_name("pants_cargo_01")
+	_check("pants_cargo_01 friendly name is 'Cargo Pants'", cargo_name == "Cargo Pants")
+	var base_name: String = ui.get_friendly_item_name("base_human_male_01")
+	_check("base_human_male_01 friendly name is 'Human Male Base'", base_name == "Human Male Base")
+	var none_name: String = ui.get_friendly_item_name("")
+	_check("empty asset_id friendly name is '(None)'", none_name == "(None)")
+
+	# 4. Item Selection, Equipped Badges, and Highlighted Borders
+	ui._select_slot("hair")
+	await process_frame
+
+	var item_list: VBoxContainer = ui.find_child("ItemList", true, false) as VBoxContainer
+	_check("ItemList exists and has children", item_list != null and item_list.get_child_count() > 0)
+
+	var mohawk_btn: Button = ui.find_child("Item_hair_mohawk_01", true, false) as Button
+	_check("Item_hair_mohawk_01 button exists", mohawk_btn != null)
+	if mohawk_btn:
+		_check("Mohawk button primary text does not show raw ID 'hair_mohawk_01'",
+			not mohawk_btn.text.begins_with("hair_mohawk_01"))
+		_check("Mohawk button contains friendly name 'Mohawk'",
+			mohawk_btn.text.contains("Mohawk"))
+
+	# Equip mohawk
+	var tracker := {"loadout_changed": false, "back_requested": false, "closed": false}
+	ui.loadout_changed.connect(func(_ld): tracker["loadout_changed"] = true)
+
+	ui._on_equip_pressed("hair_mohawk_01")
+	await process_frame
+
+	_check("Equipping mohawk emitted loadout_changed signal", tracker["loadout_changed"])
+	_check("Loadout hair slot is 'hair_mohawk_01'",
+		ui.loadout.get_equipment("hair") == "hair_mohawk_01")
+
+	# Re-check button equipped badge & border
+	mohawk_btn = ui.find_child("Item_hair_mohawk_01", true, false) as Button
+	if mohawk_btn:
+		var badge: Label = mohawk_btn.find_child("EquippedBadge", true, false) as Label
+		_check("Equipped mohawk has '✓ EQUIPPED' badge",
+			badge != null or mohawk_btn.text.contains("✓ EQUIPPED"))
+		var sb: StyleBox = mohawk_btn.get_theme_stylebox("normal")
+		if sb is StyleBoxFlat:
+			_check("Equipped mohawk has highlighted border (width >= 2)",
+				(sb as StyleBoxFlat).border_width_left >= 2)
+
+	# Unequip hair
+	ui._on_equip_pressed("")
+	await process_frame
+	_check("Unequipping hair clears hair slot", ui.loadout.get_equipment("hair") == "")
+	var none_btn: Button = ui.find_child("Item_none", true, false) as Button
+	if none_btn:
+		var none_badge: Label = none_btn.find_child("EquippedBadge", true, false) as Label
+		_check("(None) button has '✓ EQUIPPED' badge when slot is unequipped",
+			none_badge != null or none_btn.text.contains("✓ EQUIPPED"))
+
+	# 5. Category Tab Switching
+	ui._on_category_tab_changed(1) # Clothing
+	await process_frame
+	var slot_list: HBoxContainer = ui.find_child("SlotList", true, false) as HBoxContainer
+	_check("Switching to Clothing tab populates slot buttons", slot_list != null and slot_list.get_child_count() >= 3)
+	var chest_slot_btn: Button = ui.find_child("Slot_chest", true, false) as Button
+	_check("Slot_chest button exists in Clothing tab", chest_slot_btn != null)
+
+	# 6. Skin & Colors Tab Verification
+	ui._on_category_tab_changed(3) # Skin & Colors
+	await process_frame
+
+	var items_section: Control = ui.find_child("ItemsSection", true, false) as Control
+	var skin_section: Control = ui.find_child("SkinSection", true, false) as Control
+	_check("Skin & Colors tab hides ItemsSection and shows SkinSection",
+		items_section != null and not items_section.visible and skin_section != null and skin_section.visible)
+
+	var shade_slider: HSlider = ui.find_child("ShadeSlider", true, false) as HSlider
+	_check("ShadeSlider exists", shade_slider != null)
+
+	var slider_r: HSlider = ui.find_child("SliderR", true, false) as HSlider
+	var slider_g: HSlider = ui.find_child("SliderG", true, false) as HSlider
+	var slider_b: HSlider = ui.find_child("SliderB", true, false) as HSlider
+	_check("RGB sliders (R, G, B) exist", slider_r != null and slider_g != null and slider_b != null)
+
+	var skin_preview: ColorRect = ui.find_child("SkinColorPreview", true, false) as ColorRect
+	_check("SkinColorPreview exists", skin_preview != null)
+
+	# Test swatch press
+	var test_color := Color(0.33, 0.21, 0.15)
+	ui._on_skin_swatch_pressed(test_color)
+	await process_frame
+	_check("Pressing swatch updates loadout skin_tone",
+		ui.loadout.skin_tone.is_equal_approx(test_color))
+	if skin_preview:
+		_check("SkinColorPreview matches swatch color",
+			skin_preview.color.is_equal_approx(test_color))
+
+	# Test RGB slider change
+	if slider_r:
+		slider_r.value = 0.75
+	ui._on_rgb_slider_changed(0.75)
+	await process_frame
+	_check("Adjusting RGB slider updates loadout skin_tone.r",
+		is_equal_approx(ui.loadout.skin_tone.r, 0.75))
+
+	_check("Status pill remains 'All changes saved'",
+		status_pill != null and status_pill.text == "All changes saved")
+
+	# 7. Camera Zoom & Framing Presets Verification (Task f87183b6d9e4)
+	# Check framing presets
+	ui.frame_camera_preset("Head")
+	_check("Head preset frames camera to dist 1.6, height 1.62",
+		is_equal_approx(ui.camera_distance, 1.6) and is_equal_approx(ui.camera_target_height, 1.62))
+
+	ui.frame_camera_preset("Torso")
+	_check("Torso preset frames camera to dist 2.2, height 1.12",
+		is_equal_approx(ui.camera_distance, 2.2) and is_equal_approx(ui.camera_target_height, 1.12))
+
+	ui.frame_camera_preset("Feet")
+	_check("Feet preset frames camera to dist 1.8, height 0.35",
+		is_equal_approx(ui.camera_distance, 1.8) and is_equal_approx(ui.camera_target_height, 0.35))
+
+	ui.frame_camera_preset("Full Body")
+	_check("Full Body preset frames camera to dist 3.5, height 0.98",
+		is_equal_approx(ui.camera_distance, 3.5) and is_equal_approx(ui.camera_target_height, 0.98))
+
+	# Check zoom clamping [1.5, 4.5]
+	ui.set_camera_zoom(1.0) # should clamp to 1.5
+	_check("set_camera_zoom(1.0) clamps to 1.5", is_equal_approx(ui.camera_distance, 1.5))
+	ui.set_camera_zoom(5.0) # should clamp to 4.5
+	_check("set_camera_zoom(5.0) clamps to 4.5", is_equal_approx(ui.camera_distance, 4.5))
+
+	# Check mouse wheel zoom on preview container
+	ui.set_camera_zoom(3.0)
+	var wheel_up := InputEventMouseButton.new()
+	wheel_up.button_index = MOUSE_BUTTON_WHEEL_UP
+	wheel_up.pressed = true
+	ui._on_preview_gui_input(wheel_up)
+	_check("Wheel up zooms in by 0.2m (3.0 -> 2.8)", is_equal_approx(ui.camera_distance, 2.8))
+
+	var wheel_down := InputEventMouseButton.new()
+	wheel_down.button_index = MOUSE_BUTTON_WHEEL_DOWN
+	wheel_down.pressed = true
+	ui._on_preview_gui_input(wheel_down)
+	_check("Wheel down zooms out by 0.2m (2.8 -> 3.0)", is_equal_approx(ui.camera_distance, 3.0))
+
+	# Check Camera Controls Bar UI elements
+	var p_head_btn: Button = ui.find_child("Preset_Head", true, false) as Button
+	var p_full_btn: Button = ui.find_child("Preset_FullBody", true, false) as Button
+	var p_torso_btn: Button = ui.find_child("Preset_Torso", true, false) as Button
+	var p_feet_btn: Button = ui.find_child("Preset_Feet", true, false) as Button
+	_check("Preset buttons (Full Body, Head, Torso, Feet) exist",
+		p_head_btn != null and p_full_btn != null and p_torso_btn != null and p_feet_btn != null)
+
+	var zoom_slider: HSlider = ui.find_child("CameraZoomSlider", true, false) as HSlider
+	var zoom_in: Button = ui.find_child("ZoomInBtn", true, false) as Button
+	var zoom_out: Button = ui.find_child("ZoomOutBtn", true, false) as Button
+	_check("Zoom slider and +/- buttons exist",
+		zoom_slider != null and zoom_in != null and zoom_out != null)
+
+	# 8. Auto-Save on Exit Verification (Task f87183b6d9e4)
+	ui.back_requested.connect(func(): tracker["back_requested"] = true)
+	ui.closed.connect(func(): tracker["closed"] = true)
+
+	# Equip a distinct item before exit
+	ui._select_slot("head")
+	ui._on_equip_pressed("head_cyber_01")
+	await process_frame
+
+	# Trigger save_and_exit
+	await ui.save_and_exit()
+	await process_frame
+
+	_check("save_and_exit emits back_requested signal", tracker["back_requested"])
+	_check("save_and_exit emits closed signal", tracker["closed"])
+
+	# Check that user://loadout.json exists and contains head_cyber_01
+	_check("user://loadout.json was saved to disk", FileAccess.file_exists("user://loadout.json"))
+	if FileAccess.file_exists("user://loadout.json"):
+		var f := FileAccess.open("user://loadout.json", FileAccess.READ)
+		var json_str := f.get_as_text()
+		f.close()
+		_check("user://loadout.json contains 'head_cyber_01'", json_str.contains("head_cyber_01"))
+
+	# Check AvatarSystem sync
+	var avatars := root.get_node_or_null("AvatarSystem")
+	if avatars != null and avatars.current_loadout != null:
+		_check("AvatarSystem current_loadout synced 'head_cyber_01'",
+			avatars.current_loadout.get_equipment("head") == "head_cyber_01")
+
+	ui.queue_free()
+	_finish()
+
+
+func _check(description: String, condition: bool) -> bool:
+	if condition:
+		print("  PASS: ", description)
+		passed += 1
+	else:
+		printerr("  FAIL: ", description)
+		failed += 1
+	return condition
+
+
+func _finish() -> void:
+	print("\n=== SMOKE RESULT: %d/%d passed ===" % [passed, passed + failed])
+	quit(0 if failed == 0 else 1)

scripts/smoke_test_enter_world.gd

@@ -81,6 +81,13 @@ func _run() -> void:
 		return
 
 	enter_button.pressed.emit()
+	await process_frame
+	var briefing: Node = instance.find_child("WorldBriefingModal", true, false)
+	if briefing != null:
+		var modal_enter := _find_button(briefing, "Enter World")
+		if modal_enter != null:
+			modal_enter.pressed.emit()
+
 	await _wait_for_scene_change(instance, 600)  # generous -- a real POST /join may spawn a dedicated server (slow)
 
 	var game_scene := current_scene
@@ -100,16 +107,28 @@ func _run() -> void:
 		var dist := (player as CharacterBody3D).global_position.distance_to((spawn_marker as Marker3D).global_position)
 		_check("player spawned at (or very near) the PlayerSpawn marker", dist < 0.5)
 
-	# 5. Escape should return to world_list.tscn (real key event, not a
-	# direct method call -- proves the actual input binding works).
+	# 5. Escape opens the Pause Menu, and Confirm Leave safely returns to world_list.tscn
 	var esc_event := InputEventKey.new()
 	esc_event.keycode = KEY_ESCAPE
 	esc_event.pressed = true
 	Input.parse_input_event(esc_event)
-	await _wait_for_scene_change(game_scene, 60)
+	await process_frame
+	await process_frame
+	var pause_menu: Node = game_scene.find_child("PauseMenu", true, false)
+	_check("Escape opened PauseMenu in-game", pause_menu != null)
+	if pause_menu != null:
+		var leave_btn := _find_button(pause_menu, "🚪  Leave World")
+		if leave_btn != null:
+			leave_btn.pressed.emit()
+			await process_frame
+			var confirm_btn := _find_button(pause_menu, "Confirm Leave")
+			if confirm_btn != null:
+				confirm_btn.pressed.emit()
+
+	await _wait_for_scene_change(game_scene, 120)
 
 	var back_to_menu := current_scene
-	_check("Escape returned to world_list.tscn", back_to_menu != null and back_to_menu.scene_file_path == "res://scenes/world_list.tscn")
+	_check("Confirmed Leave returned to world_list.tscn", back_to_menu != null and back_to_menu.scene_file_path == "res://scenes/world_list.tscn")
 
 	_finish()
 

scripts/social_api_client.gd

@@ -11,8 +11,18 @@ static func get_api_client(node: Node) -> Node:
 
 # ── Friends & Follow & Block ──
 
-static func send_friend_request(api: Node, user_id: int) -> Dictionary:
-	return await api.request(HTTPClient.METHOD_POST, "/api/friends/requests", JSON.stringify({"user_id": user_id}), "application/json", true)
+static func send_friend_request(api: Node, target: Variant) -> Dictionary:
+	var payload: Dictionary = {}
+	if target is int:
+		payload = {"user_id": target}
+	elif target is String:
+		if (target as String).is_valid_int():
+			payload = {"user_id": int(target)}
+		else:
+			payload = {"username": (target as String).strip_edges()}
+	else:
+		payload = {"user_id": int(target)}
+	return await api.request(HTTPClient.METHOD_POST, "/api/friends/requests", JSON.stringify(payload), "application/json", true)
 
 static func get_friend_requests(api: Node) -> Dictionary:
 	return await api.request(HTTPClient.METHOD_GET, "/api/friends/requests", "", "application/json", true)

scripts/wallet_ui.gd

@@ -27,6 +27,9 @@ signal back_requested
 @onready var page_label: Label = $VBox/LedgerSection/PagingHBox/PageLabel
 
 var _api_client: Node = null
+var AudioManager: Node:
+	get:
+		return get_node_or_null("/root/AudioManager")
 var current_page: int = 0
 const PAGE_SIZE: int = 20
 var total_tx_count: int = 0
@@ -72,6 +75,12 @@ func _on_back_pressed() -> void:
 		get_tree().change_scene_to_file("res://scenes/main_menu.tscn")
 
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_back_pressed()
+
+
 func show_status(text: String, is_error: bool = false) -> void:
 	if not status_label:
 		return
@@ -123,6 +132,7 @@ func _buy_pack(credits: int) -> void:
 	show_status("Processing purchase of %d Buffalo Chips..." % credits)
 	var res: Dictionary = await EconomyApiClient.purchase_credits(api, credits)
 	if res.ok and res.data is Dictionary:
+		AudioManager.play_coin()
 		var new_bal: int = int(res.data.get("new_balance", 0))
 		if balance_label:
 			balance_label.text = "%d Buffalo Chips" % new_bal

scripts/world_briefing_modal.gd

@@ -222,3 +222,9 @@ func _on_report_world_pressed() -> void:
 	var rep_modal = _report_modal_scene.new()
 	rep_modal.setup_report("world", world_id, world_name)
 	get_parent().add_child(rep_modal)
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		get_viewport().set_input_as_handled()
+		_on_cancel_pressed()

scripts/world_list.gd

@@ -438,3 +438,19 @@ func _on_enter_world_pressed(world_id: int, button: Button) -> void:
 func _on_edit_world_pressed(world_id: int) -> void:
 	Session.begin_edit(world_id)
 	get_tree().change_scene_to_file("res://scenes/game.tscn")
+
+
+func _unhandled_input(event: InputEvent) -> void:
+	if event.is_action_pressed("ui_cancel"):
+		if _create_modal != null and is_instance_valid(_create_modal):
+			_create_modal.queue_free()
+			_create_modal = null
+			get_viewport().set_input_as_handled()
+			return
+		for child in get_children():
+			if child is WorldBriefingModal:
+				child.queue_free()
+				get_viewport().set_input_as_handled()
+				return
+		get_viewport().set_input_as_handled()
+		_on_back_button_pressed()