"""Native PristonTale EU dashboard; Wine never hosts the updater UI."""

from __future__ import annotations

import base64
import json
import math
import queue
import subprocess
import sys
import threading
import time
from typing import TYPE_CHECKING, Callable, Iterator, Mapping

if TYPE_CHECKING:
	from tkinter import PhotoImage, Toplevel

from .. import __version__
from ..changelog import (
	MAX_PATCHES as MAX_PATCH_NOTES,
	PatchNote,
	fetch_patch_notes,
	patch_change_tag,
	read_cached_patch_notes,
)
from ..depot import (
	DEFAULT_DEPOT_START_OPTION,
	DepotClient,
	DepotError,
	DepotSnapshot,
	DepotStartOption,
	cache_depot_launch_catalog,
	launch_catalog_from_snapshot,
	select_depot_start_option,
)
from ..desktop_identity import (
	APPLICATION_NAME,
	APPLICATION_WM_CLASS,
	find_application_icon,
)
from ..dashboard_debug import (
	RuntimeDebugInfo,
	VerificationDebugInfo,
	inspect_runtime_debug,
	read_verification_debug,
)
from ..install_status import (
	GameInstallationStatus,
	PrimaryAction,
	inspect_game_installation,
)
from ..import_state import game_import_requires_verification
from ..news import (
	Broadcast,
	NewsArticle,
	fetch_latest_broadcast,
	fetch_news,
	fetch_news_image,
	fetch_official_logo,
	read_cached_broadcast,
	read_cached_news,
	read_cached_news_image,
	read_cached_official_logo,
)
from ..overlay import RuntimeCompatibility, inspect_runtime_compatibility
from ..paths import AppPaths
from ..settings import Settings, ensure_settings, load_settings, update_settings
from ..self_update import (
	LauncherUpdateCheck,
	cache_launcher_update_check,
	check_for_launcher_update,
	read_cached_launcher_update_check,
)
from ..server_status import RealmServerStatus
from ..tk_chrome import (
	centered_window_geometry,
	create_dashboard_chrome,
	create_window_chrome,
	load_square_window_icon,
	show_themed_dialog,
)
from ..telemetry import current_telemetry, set_shared_telemetry_enabled
from .components.action_panel import build_action_panel
from .components.broadcasts_panel import build_broadcasts_panel
from .components.header import build_dashboard_header
from .components.news_panel import (
	MAX_NEWS_CARDS,
	NEWS_CARD_HEIGHT,
	NEWS_IMAGE_HEIGHT,
	NEWS_IMAGE_WIDTH,
	PATCH_CARD_WRAP_LENGTH,
	PATCH_CHANGE_WRAP_LENGTH,
	build_news_panel,
)
from .components.progress_panel import build_progress_panel
from .components.server_status import render_server_status as render_server_status_component
from .components.theme import configure_dashboard_style
from .components.update_dialog import LauncherUpdateDialog
from .dialogs.activity import build_activity_window
from .viewmodels.dashboard import (
	ACTIVE_POLL_INTERVAL_MILLISECONDS,
	BASE_DISPLAY_DPI,
	BASE_TK_SCALING,
	DASHBOARD_PRELOADER_TIMEOUT_MILLISECONDS,
	DASHBOARD_STARTUP_COMPONENTS,
	DASHBOARD_TRANSITION_STEP_MILLISECONDS,
	DASHBOARD_TRANSITION_STEPS,
	PRELOADER_STATUS_CHARACTERS,
	STARTUP_PROGRESS_ANIMATION_INTERVAL_MILLISECONDS,
	WINDOW_HEIGHT,
	WINDOW_WIDTH,
	DashboardError,
	GameClientTracker,
	GameLaunchSupervisorRegistry,
	dashboard_content_ready,
	dashboard_controls_stacked,
	dashboard_poll_interval,
	dashboard_preloader_delay,
	dashboard_transition_opacity,
	debug_elapsed_text,
	fitted_window_size,
	freeze_preloader_geometry,
	game_client_activity_text,
	interrupt_game_supervisor,
	launcher_child_command,
	launcher_child_environment,
	launcher_restart_spec,
	launcher_update_presentation,
	news_card_columns,
	preloader_logo_subsample_factor,
	preloader_status_text,
	resolve_ui_scale,
	startup_progress_animation_value,
)
from .viewmodels.downloader import (
	ProgressCoalescer,
	TransferRateEstimator,
	as_non_negative_float as _as_float,
	as_non_negative_int as _as_int,
	download_activity_metadata,
	format_bytes as _format_bytes,
	format_eta,
	format_transfer_rate,
	operation_activity_text,
	should_refresh_operation_elapsed,
)
from .viewmodels.health import (
	ServerStatusCheck,
	perform_server_status_check,
	server_status_check_text,
	server_status_presentation,
)
from .viewmodels.installation import (
	game_file_progress_status,
	game_sync_presentation,
)
from .dialogs.settings_dialog import open_settings_dialog


LAUNCH_STAGE_TOTAL = 4
EVENT_BATCH_SIZE = 48
MAX_ACTIVITY_LOG_LINES = 5000
ACTIVITY_LOG_TRIM_LINES = 500
PATCH_PRELOAD_INTERVAL_MILLISECONDS = 1
DASHBOARD_DEBUG_KEY = "<Control-Shift-F12>"


def launch_external_url(url: str) -> None:
	"""Open one web URL without leaking desktop-toolkit diagnostics to stderr."""

	if not url.casefold().startswith("https://"):
		raise DashboardError("only HTTPS links can be opened")
	try:
		process = subprocess.Popen(
			["xdg-open", url],
			stdin=subprocess.DEVNULL,
			stdout=subprocess.DEVNULL,
			stderr=subprocess.DEVNULL,
			start_new_session=True,
		)
	except OSError as error:
		raise DashboardError(f"could not start the desktop web browser: {error}") from error
	threading.Thread(
		target=process.wait,
		name="ptlinux-desktop-url-opener",
		daemon=True,
	).start()


def patch_change_colors(type_key: str) -> tuple[str, str]:
	"""Return a restrained card-background palette for one patch change tag."""

	return {
		"fixed": ("#321c1a", "#e88879"),
		"hotfix": ("#352018", "#e6a06a"),
		"new-feature": ("#192a20", "#77c795"),
		"improvement": ("#19252c", "#82b8d2"),
		"security": ("#302719", "#ddbb69"),
		"server": ("#282035", "#b8a0d8"),
		"game": ("#242b1b", "#a8ca75"),
	}.get(type_key.casefold(), ("#2a201c", "#d8aa61"))


def run_dashboard(paths: AppPaths) -> None:
	try:
		import tkinter as tk
		from tkinter import filedialog, ttk
	except ImportError as exc:
		raise DashboardError(
			"Python Tk is missing. Install your distribution's python3-tk package "
			"or use the pristontale-eu command-line interface."
		) from exc

	paths.create_base_directories()
	root = tk.Tk(className=APPLICATION_WM_CLASS)
	root.title(f"{APPLICATION_NAME} — Linux Launcher")
	root.iconname(APPLICATION_NAME)
	window_icon: PhotoImage | None = None
	window_icon_path = find_application_icon()
	if window_icon_path is not None:
		try:
			loaded_window_icon = load_square_window_icon(root, window_icon_path)
			root.iconphoto(True, loaded_window_icon)
			window_icon = loaded_window_icon
		except (OSError, tk.TclError) as icon_error:
			print(
				f"Warning: could not load the launcher icon: {icon_error}",
				file=sys.stderr,
			)

	def apply_window_icon(window: Toplevel) -> None:
		icon = window_icon
		if icon is not None:
			window.iconphoto(False, icon)

	root.configure(background="#0c0908")
	root.withdraw()
	root.geometry(f"{WINDOW_WIDTH}x{WINDOW_HEIGHT}")
	try:
		startup_settings = ensure_settings(paths)
	except (OSError, ValueError) as startup_error:
		root.deiconify()
		show_themed_dialog(
			root,
			title="Launcher settings",
			message=f"The launcher could not load its settings:\n\n{startup_error}",
			kind="error",
			window_icon=window_icon,
		)
		root.destroy()
		return
	try:
		detected_dpi = float(root.winfo_fpixels("1i"))
	except (tk.TclError, TypeError, ValueError):
		detected_dpi = BASE_DISPLAY_DPI
	launcher_ui_scale = resolve_ui_scale(startup_settings.ui_scale, detected_dpi)
	news_card_height = round(NEWS_CARD_HEIGHT * launcher_ui_scale)
	news_image_width = round(NEWS_IMAGE_WIDTH * launcher_ui_scale)
	news_image_height = round(NEWS_IMAGE_HEIGHT * launcher_ui_scale)
	patch_card_wrap_length = round(PATCH_CARD_WRAP_LENGTH * launcher_ui_scale)
	patch_change_wrap_length = round(PATCH_CHANGE_WRAP_LENGTH * launcher_ui_scale)
	try:
		root.tk.call("tk", "scaling", BASE_TK_SCALING * launcher_ui_scale)
	except tk.TclError:
		pass
	initial_width, initial_height = fitted_window_size(
		WINDOW_WIDTH,
		WINDOW_HEIGHT,
		scale=launcher_ui_scale,
		screen_width=root.winfo_screenwidth(),
		screen_height=root.winfo_screenheight(),
	)
	root.geometry(f"{initial_width}x{initial_height}")
	root.resizable(False, False)
	dashboard_chrome = create_dashboard_chrome(
		root,
		title="PRISTONTALE EU",
		subtitle="NATIVE LINUX LAUNCHER",
		window_icon=window_icon,
	)
	dashboard_content = dashboard_chrome.content

	configure_dashboard_style(root, ttk, launcher_ui_scale)

	startup_started_at = time.monotonic()
	startup_status = tk.StringVar(value="Loading dashboard contents…")
	startup_image_references: list[tk.PhotoImage] = []
	startup_overlay = tk.Frame(
		dashboard_content,
		background="#0c0908",
		borderwidth=0,
		highlightthickness=0,
	)
	startup_overlay.place(x=0, y=0, relwidth=1, relheight=1)
	startup_border = tk.Frame(
		startup_overlay,
		background="#6a482d",
		borderwidth=0,
		highlightthickness=0,
	)
	startup_border.place(relx=0.5, rely=0.5, anchor="center")
	startup_shell = ttk.Frame(
		startup_border,
		style="Root.TFrame",
		padding=(34, 26),
	)
	startup_shell.pack(fill="both", expand=True, padx=1, pady=1)
	startup_logo_source = window_icon
	if startup_logo_source is not None:
		startup_logo_factor = preloader_logo_subsample_factor(
			startup_logo_source.width(),
			startup_logo_source.height(),
		)
		loaded_startup_logo = startup_logo_source.subsample(
			startup_logo_factor,
			startup_logo_factor,
		)
		startup_image_references.append(loaded_startup_logo)
		tk.Label(
			startup_shell,
			image=loaded_startup_logo,
			background="#0c0908",
			borderwidth=0,
			highlightthickness=0,
		).pack(anchor="center", pady=(0, 16))
	ttk.Label(
		startup_shell,
		text="Preparing the launcher…",
		style="PreloaderStatus.TLabel",
		anchor="center",
	).pack(fill="x")
	startup_status_label = ttk.Label(
		startup_shell,
		textvariable=startup_status,
		style="PreloaderMuted.TLabel",
		width=PRELOADER_STATUS_CHARACTERS,
		anchor="center",
	)
	startup_status_label.pack(fill="x", pady=(5, 11))
	startup_progress_value = tk.DoubleVar(value=0.0)
	startup_progress = ttk.Progressbar(
		startup_shell,
		style="Depot.Horizontal.TProgressbar",
		orient="horizontal",
		mode="determinate",
		maximum=len(DASHBOARD_STARTUP_COMPONENTS),
		variable=startup_progress_value,
		length=420,
		takefocus=False,
	)
	startup_progress.pack(fill="x")
	freeze_preloader_geometry(startup_border)
	startup_ready_components: set[str] = set()
	startup_transition_started = False
	startup_ready_after: str | None = None
	startup_timeout_after: str | None = None
	startup_progress_after: str | None = None
	startup_progress_target = 0.0
	remote_refresh_started = False
	root.deiconify()
	root.lift()
	startup_overlay.lift()
	root.update()

	def cancel_startup_progress_animation() -> None:
		nonlocal startup_progress_after
		if startup_progress_after is None:
			return
		try:
			root.after_cancel(startup_progress_after)
		except tk.TclError:
			pass
		startup_progress_after = None

	def animate_startup_progress() -> None:
		nonlocal startup_progress_after
		startup_progress_after = None
		if startup_transition_started or not startup_overlay.winfo_exists():
			return
		current = float(startup_progress_value.get())
		value = startup_progress_animation_value(current, startup_progress_target)
		startup_progress_value.set(value)
		if value != startup_progress_target:
			startup_progress_after = root.after(
				STARTUP_PROGRESS_ANIMATION_INTERVAL_MILLISECONDS,
				animate_startup_progress,
			)

	def set_startup_progress_target(value: float, *, immediate: bool = False) -> None:
		nonlocal startup_progress_after, startup_progress_target
		startup_progress_target = min(
			max(0.0, value),
			float(len(DASHBOARD_STARTUP_COMPONENTS)),
		)
		if immediate:
			cancel_startup_progress_animation()
			startup_progress_value.set(startup_progress_target)
			return
		if startup_progress_after is None:
			startup_progress_after = root.after(
				STARTUP_PROGRESS_ANIMATION_INTERVAL_MILLISECONDS,
				animate_startup_progress,
			)

	def update_startup_progress(message: str) -> None:
		if startup_transition_started:
			return
		set_startup_progress_target(float(len(startup_ready_components)))
		startup_status.set(
			f"{message} · {len(startup_ready_components)}/"
			f"{len(DASHBOARD_STARTUP_COMPONENTS)}"
		)

	def cancel_startup_after(identifier: str | None) -> None:
		if identifier is None:
			return
		try:
			root.after_cancel(identifier)
		except tk.TclError:
			pass

	def set_startup_component_pending(component: str) -> None:
		nonlocal startup_ready_after
		if startup_transition_started or component not in DASHBOARD_STARTUP_COMPONENTS:
			return
		if component not in startup_ready_components:
			return
		startup_ready_components.remove(component)
		cancel_startup_after(startup_ready_after)
		startup_ready_after = None
		update_startup_progress("Loading dashboard content…")

	def mark_startup_component_ready(component: str, message: str) -> None:
		if startup_transition_started or component not in DASHBOARD_STARTUP_COMPONENTS:
			return
		startup_ready_components.add(component)
		update_startup_progress(message)
		maybe_start_dashboard_transition()

	def set_root_opacity(value: float) -> bool:
		try:
			root.attributes("-alpha", value)
		except tk.TclError:
			return False
		return True

	def finish_dashboard_transition() -> None:
		set_root_opacity(1.0)
		root.lift()
		play_button.focus_set()
		telemetry = current_telemetry()
		if telemetry is not None:
			telemetry.mark_ready({"interface": "gui"})
		root.after_idle(start_remote_content_refresh)

	def fade_dashboard_in(step: int = 0) -> None:
		if not set_root_opacity(
			dashboard_transition_opacity(step, fading_in=True)
		):
			finish_dashboard_transition()
			return
		if step >= DASHBOARD_TRANSITION_STEPS:
			finish_dashboard_transition()
			return
		root.after(
			DASHBOARD_TRANSITION_STEP_MILLISECONDS,
			lambda: fade_dashboard_in(step + 1),
		)

	def swap_loader_for_dashboard(*, fade_supported: bool) -> None:
		if startup_overlay.winfo_exists():
			startup_overlay.destroy()
		startup_image_references.clear()
		root.update_idletasks()
		if fade_supported:
			fade_dashboard_in()
		else:
			finish_dashboard_transition()

	def fade_loader_out(step: int = 0) -> None:
		fade_supported = set_root_opacity(
			dashboard_transition_opacity(step, fading_in=False)
		)
		if not fade_supported or step >= DASHBOARD_TRANSITION_STEPS:
			swap_loader_for_dashboard(fade_supported=fade_supported)
			return
		root.after(
			DASHBOARD_TRANSITION_STEP_MILLISECONDS,
			lambda: fade_loader_out(step + 1),
		)

	def begin_dashboard_transition(*, timed_out: bool = False) -> None:
		nonlocal startup_transition_started
		nonlocal startup_ready_after, startup_timeout_after
		if startup_transition_started:
			return
		startup_transition_started = True
		cancel_startup_after(startup_ready_after)
		cancel_startup_after(startup_timeout_after)
		startup_ready_after = None
		startup_timeout_after = None
		if timed_out:
			settle_pending_news_artwork()
			if "version" not in startup_ready_components:
				version.set(
					f"Launcher {__version__} · game build check continuing in background"
				)
		set_startup_progress_target(
			float(len(DASHBOARD_STARTUP_COMPONENTS)),
			immediate=True,
		)
		startup_status.set(
			"Opening dashboard with available content…"
			if timed_out
			else "Opening dashboard…"
		)
		startup_overlay.update_idletasks()
		root.after(80, fade_loader_out)

	def maybe_start_dashboard_transition() -> None:
		nonlocal startup_ready_after
		if startup_transition_started or not dashboard_content_ready(
			startup_ready_components
		):
			return
		remaining = dashboard_preloader_delay(startup_started_at)
		if remaining <= 0:
			begin_dashboard_transition()
			return
		if startup_ready_after is None:
			startup_ready_after = root.after(
				remaining,
				start_dashboard_after_minimum,
			)

	def start_dashboard_after_minimum() -> None:
		nonlocal startup_ready_after
		startup_ready_after = None
		maybe_start_dashboard_transition()

	def timeout_startup_preloader() -> None:
		nonlocal startup_timeout_after
		startup_timeout_after = None
		begin_dashboard_transition(timed_out=True)

	header_widgets = build_dashboard_header(
		dashboard_content,
		widgets=ttk,
		tk_module=tk,
		launcher_version=__version__,
		window_icon=window_icon,
	)
	frame = header_widgets.frame
	version = header_widgets.version
	logo = header_widgets.logo

	action_widgets = build_action_panel(
		frame,
		ttk=ttk,
		launcher_version=__version__,
	)
	controls = action_widgets.container
	game_actions = action_widgets.game_actions
	system_actions = action_widgets.system_actions
	update_button = action_widgets.update_button
	repair_button = action_widgets.repair_button
	import_button = action_widgets.import_button
	doctor_button = action_widgets.doctor_button
	settings_button = action_widgets.settings_button
	launcher_update_button = action_widgets.launcher_update_button
	launcher_update_badge = action_widgets.launcher_update_badge

	progress_widgets = build_progress_panel(
		frame,
		widgets=ttk,
		tk_module=tk,
		default_realm=DEFAULT_DEPOT_START_OPTION.name,
	)
	realm_value = progress_widgets.realm_value
	realm_selector = progress_widgets.realm_selector
	play_button = progress_widgets.play_button
	status = progress_widgets.status
	progress_text = progress_widgets.progress_text
	speed_text = progress_widgets.speed_text
	client_activity_text = progress_widgets.client_activity_text
	progress_bar = progress_widgets.progress_bar
	server_status_content = progress_widgets.server_status_content
	server_status_debug_text = progress_widgets.server_status_debug_text
	log_toggle = progress_widgets.log_toggle
	refresh_activity_meta_text = progress_widgets.refresh_activity_metadata
	set_download_context_text = progress_widgets.set_download_context

	news_widgets = build_news_panel(
		frame,
		ttk_module=ttk,
		tk_module=tk,
		controls=controls,
		ui_scale=launcher_ui_scale,
	)
	news_panel = news_widgets.container
	news_tab_button = news_widgets.news_tab_button
	patches_tab_button = news_widgets.patches_tab_button
	news_canvas = news_widgets.canvas
	news_scrollbar = news_widgets.scrollbar
	news_content_host = news_widgets.content_host
	news_content = news_widgets.news_content
	patches_content = news_widgets.patches_content
	news_window = news_widgets.canvas_window

	broadcast_widgets = build_broadcasts_panel(
		frame,
		ttk=ttk,
		before=news_panel,
	)
	broadcast_content = broadcast_widgets.content

	activity_widgets = build_activity_window(
		root,
		tk_module=tk,
		ui_scale=launcher_ui_scale,
		apply_window_icon=apply_window_icon,
	)
	activity_window = activity_widgets.window
	log = activity_widgets.log
	events: queue.Queue[tuple[str, object]] = queue.Queue()
	progress_updates = ProgressCoalescer()
	transfer_rate = TransferRateEstimator()
	news_image_targets: dict[int, tk.Canvas] = {}
	news_image_references: dict[int, tk.PhotoImage] = {}
	news_card_widgets: list[tk.Frame] = []
	news_layout_columns = MAX_NEWS_CARDS
	startup_news_images_pending: set[int] = set()
	active_news_tab = "news"
	rendered_news_articles: tuple[NewsArticle, ...] | None = None
	rendered_patch_notes: tuple[PatchNote, ...] | None = None
	patch_render_generation = 0
	patch_render_target: tuple[PatchNote, ...] | None = None
	patch_render_callbacks: list[Callable[[], None]] = []
	logo_image_references: list[tk.PhotoImage] = []
	preloader: tk.Toplevel | None = None
	preloader_status: tk.StringVar | None = None
	preloader_progress: ttk.Progressbar | None = None
	preloader_image_references: list[tk.PhotoImage] = []
	settings_window: tk.Toplevel | None = None
	launcher_update_dialog: LauncherUpdateDialog | None = None
	dashboard_debug_window: tk.Toplevel | None = None
	dashboard_debug_output: tk.Text | None = None
	game_clients = GameClientTracker()
	game_launch_supervisors = GameLaunchSupervisorRegistry()
	client_runtime_debug: dict[int, RuntimeDebugInfo] = {}
	client_launch_settings: dict[int, Settings] = {}
	active_game_launch_id: int | None = None
	operation_active = False
	game_window_active = False
	activity_log_lines = 0
	operation_started_at: float | None = None
	operation_stage = 0
	operation_stage_total = 0
	operation_message = ""
	operation_progress_detail: str | None = None
	operation_refreshes_compatibility = False
	operation_file_progress_verb = "Updating"
	last_elapsed_second = -1
	official_snapshot: DepotSnapshot | None = None
	latest_installation_status: GameInstallationStatus | None = None
	available_start_options: tuple[DepotStartOption, ...] = (DEFAULT_DEPOT_START_OPTION,)
	preferred_realm = startup_settings.realm
	latest_server_statuses: tuple[RealmServerStatus, ...] | None = None
	latest_server_status_check: ServerStatusCheck | None = None
	server_status_placeholder = "Checking official server status…"
	show_dashboard_debug = False
	dashboard_runtime_debug: RuntimeDebugInfo | None = None
	dashboard_verification_debug: VerificationDebugInfo | None = None
	dashboard_debug_state_error: str | None = None
	last_dashboard_debug_render = ""
	launcher_update_check: LauncherUpdateCheck | None = None
	runtime_compatibility: RuntimeCompatibility | None = None
	compatibility_check_generation = 0
	controls_are_stacked: bool | None = None
	responsive_layout_after: str | None = None
	buttons = (
		play_button,
		*action_widgets.operation_buttons,
	)
	game_mutation_buttons = action_widgets.mutation_buttons

	def append_log(value: str) -> None:
		nonlocal activity_log_lines
		rendered = value.rstrip() + "\n"
		log.configure(state="normal")
		log.insert("end", rendered)
		activity_log_lines += rendered.count("\n")
		if activity_log_lines > MAX_ACTIVITY_LOG_LINES:
			retained_lines = MAX_ACTIVITY_LOG_LINES - ACTIVITY_LOG_TRIM_LINES
			excess = activity_log_lines - retained_lines
			log.delete("1.0", f"{excess + 1}.0")
			activity_log_lines -= excess
		log.see("end")
		log.configure(state="disabled")

	def toggle_log() -> None:
		if activity_window.state() == "withdrawn":
			activity_window.deiconify()
			activity_window.lift()
			activity_window.focus_set()
		else:
			activity_window.withdraw()

	def hide_activity_window() -> None:
		activity_window.withdraw()

	activity_window.protocol("WM_DELETE_WINDOW", hide_activity_window)

	def set_busy(value: bool) -> None:
		new_state = "disabled" if value else "normal"
		for button in buttons:
			button.configure(state=new_state)
		realm_selector.configure(state="disabled" if value else "readonly")
		if not value and game_clients.running_count:
			for button in game_mutation_buttons:
				button.configure(state="disabled")

	def update_progress(event: Mapping[str, object]) -> None:
		nonlocal operation_progress_detail
		phase = event.get("phase")
		files_completed = _as_int(event.get("files_completed"))
		files_total = _as_int(event.get("files_total"))
		bytes_completed = _as_int(event.get("bytes_completed"))
		bytes_total = _as_int(event.get("bytes_total"))
		current_file = event.get("current_file")
		if phase == "manifest":
			transfer_rate.reset()
			speed_text.set("")
			set_download_context_text("")
			set_operation_stage(1, 3, "Checking official CDN manifests…")
			return
		progress_bar.stop()
		progress_bar.configure(mode="determinate")
		if bytes_total:
			progress_bar.configure(maximum=bytes_total, value=min(bytes_completed, bytes_total))
			bytes_remaining = _as_int(event.get("bytes_remaining"))
			if "bytes_remaining" not in event:
				bytes_remaining = max(0, bytes_total - bytes_completed)
			percent = min(100, round((bytes_completed / bytes_total) * 100))
			operation_progress_detail = (
				f"{percent}% · {files_completed:,}/{files_total:,} files · "
				f"{_format_bytes(bytes_completed)} / {_format_bytes(bytes_total)} · "
				f"{_format_bytes(bytes_remaining)} remaining"
			)
			if phase == "downloading":
				bytes_transferred = _as_int(event.get("bytes_transferred"))
				estimated_rate = transfer_rate.update(bytes_transferred)
				reported_rate = _as_float(
					event.get("transfer_rate_bytes_per_second")
				)
				rate = reported_rate if reported_rate is not None else estimated_rate
				eta_seconds = _as_float(event.get("eta_seconds"))
				if eta_seconds is None and rate is not None and rate > 0:
					eta_seconds = bytes_remaining / rate
				speed_text.set(
					f"{format_transfer_rate(rate) if rate is not None else '0 B/s'} · "
					f"ETA {format_eta(eta_seconds)}"
				)
				current_server = event.get("current_server")
				active_workers = _as_int(event.get("active_workers"))
				target_workers = _as_int(event.get("target_workers"))
				retry_reason = event.get("retry_reason")
				set_download_context_text(
					download_activity_metadata(
						current_server=(
							current_server
							if isinstance(current_server, str) and current_server
							else None
						),
						retry_count=_as_int(event.get("retry_count")),
						retry_reason=(
							retry_reason
							if isinstance(retry_reason, str) and retry_reason
							else None
						),
						active_workers=active_workers,
						target_workers=target_workers,
					)
				)
			else:
				transfer_rate.reset()
				speed_text.set("")
				set_download_context_text("")
		else:
			progress_bar.configure(maximum=3, value=3)
			operation_progress_detail = "Game files are already up to date."
			transfer_rate.reset()
			speed_text.set("")
			set_download_context_text("")
		progress_text.set(activity_text())
		if isinstance(current_file, str) and current_file:
			status.set(
				game_file_progress_status(current_file, operation_file_progress_verb)
			)
		elif phase == "complete":
			status.set("Game files are up to date and verified.")

	def activity_text() -> str:
		return operation_activity_text(
			operation_message,
			started_at=operation_started_at,
			step=operation_stage,
			total=operation_stage_total,
			detail=operation_progress_detail,
		)

	def set_operation_stage(step: int, total: int, message: str) -> None:
		nonlocal operation_stage, operation_stage_total, operation_message
		nonlocal operation_progress_detail
		operation_stage = min(max(step, 0), total)
		operation_stage_total = max(total, 1)
		operation_message = message
		operation_progress_detail = None
		transfer_rate.reset()
		speed_text.set("")
		set_download_context_text("")
		progress_bar.stop()
		progress_bar.configure(
			mode="determinate",
			maximum=operation_stage_total,
			value=operation_stage,
		)
		status.set(message)
		progress_text.set(activity_text())
		set_preloader_status(message, operation_stage, operation_stage_total)

	def update_elapsed_indicator() -> None:
		nonlocal last_elapsed_second
		if not should_refresh_operation_elapsed(
			active=operation_active,
			started_at=operation_started_at,
			stage_total=operation_stage_total,
			detail=operation_progress_detail,
		):
			return
		assert operation_started_at is not None
		elapsed = int(time.monotonic() - operation_started_at)
		if elapsed == last_elapsed_second:
			return
		last_elapsed_second = elapsed
		progress_text.set(activity_text())
		set_preloader_status(operation_message, operation_stage, operation_stage_total)

	def cancel_active_game_launch() -> None:
		client_id = active_game_launch_id
		if client_id is None:
			close_game_preloader()
			return
		process = game_launch_supervisors.request_cancel(client_id)
		interrupted = process is not None and interrupt_game_supervisor(process)
		if interrupted:
			append_log(f"Cancelling game client {client_id}; stopping its process group.")
		elif process is None:
			append_log(f"Cancelling game client {client_id} before its supervisor starts.")
		else:
			append_log(f"Game client {client_id} was already stopping.")
		close_game_preloader()
		root.deiconify()
		root.lift()
		status.set(f"Cancelling game client {client_id}…")
		progress_text.set("Stopping the initiated game and compatibility processes…")

	def show_game_preloader() -> None:
		nonlocal preloader, preloader_status, preloader_progress
		if preloader is not None and preloader.winfo_exists():
			return
		window = tk.Toplevel(root)
		window.withdraw()
		preloader = window
		window.title("Launching PristonTale EU")
		window.configure(background="#0c0908")
		window.resizable(False, False)
		window.protocol("WM_DELETE_WINDOW", cancel_active_game_launch)
		window.transient(root)
		apply_window_icon(window)
		loader_chrome = create_window_chrome(
			window,
			title="",
			subtitle="",
			show_title_bar=False,
			show_close=False,
			show_minimize=False,
			allow_close=True,
		)
		loader_chrome.set_close_command(cancel_active_game_launch)
		cancel_button = tk.Button(
			loader_chrome.content,
			text="×",
			command=cancel_active_game_launch,
			background="#0c0908",
			foreground="#bda998",
			activebackground="#a63f2f",
			activeforeground="#ffffff",
			font=("Sans", 12),
			width=3,
			borderwidth=0,
			highlightthickness=0,
			relief="flat",
			cursor="hand2",
			takefocus=True,
		)
		cancel_button.place(relx=1.0, x=-9, y=9, anchor="ne")
		status_variable = tk.StringVar(value="Starting launcher process…")
		preloader_status = status_variable
		content = ttk.Frame(
			loader_chrome.content,
			style="Root.TFrame",
			padding=(34, 26),
		)
		content.pack(fill="both", expand=True)
		cancel_button.lift()
		logo_source = window_icon
		if logo_source is not None:
			modal_logo_factor = preloader_logo_subsample_factor(
				logo_source.width(),
				logo_source.height(),
			)
			modal_logo = logo_source.subsample(
				modal_logo_factor,
				modal_logo_factor,
			)
			preloader_image_references.clear()
			preloader_image_references.append(modal_logo)
			tk.Label(
				content,
				image=modal_logo,
				background="#0c0908",
				borderwidth=0,
				highlightthickness=0,
			).pack(anchor="center", pady=(0, 16))
		ttk.Label(
			content,
			text="Preparing the game window…",
			style="PreloaderStatus.TLabel",
			anchor="center",
		).pack(fill="x")
		status_label = ttk.Label(
			content,
			textvariable=status_variable,
			style="PreloaderMuted.TLabel",
			width=PRELOADER_STATUS_CHARACTERS,
			anchor="center",
		)
		status_label.pack(
			fill="x",
			pady=(5, 11),
		)
		progress_widget = ttk.Progressbar(
			content,
			style="Depot.Horizontal.TProgressbar",
			mode="determinate",
			maximum=LAUNCH_STAGE_TOTAL,
			value=1,
		)
		preloader_progress = progress_widget
		progress_widget.pack(fill="x")
		freeze_preloader_geometry(content)
		root.update_idletasks()
		window.update_idletasks()
		width = window.winfo_reqwidth()
		height = window.winfo_reqheight()
		window.geometry(
			centered_window_geometry(
				width,
				height,
				parent_x=root.winfo_rootx(),
				parent_y=root.winfo_rooty(),
				parent_width=root.winfo_width(),
				parent_height=root.winfo_height(),
			)
		)
		window.deiconify()
		window.lift()
		window.grab_set()
		window.focus_force()

	def set_preloader_status(value: str, step: int | None = None, total: int | None = None) -> None:
		if preloader_status is not None:
			preloader_status.set(preloader_status_text(value, step, total))
		if preloader_progress is not None and step is not None and total is not None:
			preloader_progress.configure(maximum=total, value=step)

	def close_game_preloader() -> None:
		nonlocal preloader, preloader_status, preloader_progress
		if preloader is not None and preloader.winfo_exists():
			try:
				preloader.grab_release()
			except tk.TclError:
				pass
			preloader.destroy()
		preloader = None
		preloader_status = None
		preloader_progress = None
		preloader_image_references.clear()

	def run_operation(
		label: str,
		command: list[str],
		*,
		show_preloader: bool = False,
		restart_on_success: bool = False,
		game_files_may_change: bool = False,
		file_progress_verb: str = "Updating",
		game_client_id: int | None = None,
	) -> None:
		nonlocal operation_active, game_window_active
		nonlocal operation_started_at
		nonlocal operation_stage
		nonlocal operation_stage_total
		nonlocal operation_message
		nonlocal operation_progress_detail
		nonlocal operation_refreshes_compatibility
		nonlocal operation_file_progress_verb
		nonlocal last_elapsed_second
		operation_active = True
		game_window_active = game_clients.running_count > 0
		operation_started_at = time.monotonic()
		operation_stage = 0
		operation_stage_total = 0
		operation_message = ""
		operation_progress_detail = None
		operation_refreshes_compatibility = game_files_may_change
		operation_file_progress_verb = file_progress_verb
		last_elapsed_second = -1
		progress_updates.clear()
		transfer_rate.reset()
		speed_text.set("")
		set_download_context_text("")
		set_busy(True)
		status.set(label)
		progress_text.set("Waiting for the operation to report progress…")
		if show_preloader:
			show_game_preloader()
			set_operation_stage(1, LAUNCH_STAGE_TOTAL, "Starting launcher process…")
		else:
			progress_bar.stop()
			progress_bar.configure(mode="determinate", maximum=3, value=0)
		append_log(f"$ {' '.join(command)}")

		def worker() -> None:
			def publish_output(output_line: str) -> None:
				if game_client_id is None:
					events.put(("output", output_line))
				else:
					events.put(("output", f"[Client {game_client_id}] {output_line}"))

			if (
				game_client_id is not None
				and game_launch_supervisors.is_cancel_requested(game_client_id)
			):
				publish_output("Launch cancelled before the game supervisor started.\n")
				events.put(("game_done", (game_client_id, 130)))
				return
			try:
				process = subprocess.Popen(
					command,
					text=True,
					encoding="utf-8",
					errors="replace",
					stdout=subprocess.PIPE,
					stderr=subprocess.STDOUT,
					bufsize=1,
					env=launcher_child_environment(),
					)
			except OSError as process_error:
				publish_output(f"Could not start operation: {process_error}\n")
				if game_client_id is None:
					events.put(("done", 1))
				else:
					events.put(("game_done", (game_client_id, 1)))
				return
			if game_client_id is not None:
				cancel_on_start = game_launch_supervisors.attach(
					game_client_id,
					process,
				)
				events.put(
					("game_supervisor_started", (game_client_id, process.pid))
				)
				if cancel_on_start:
					publish_output("Stopping the game supervisor after launch cancellation.\n")
					interrupt_game_supervisor(process)
			if process.stdout is not None:
				for line in process.stdout:
					if line.startswith("STATUS "):
						try:
							parsed_status = json.loads(line.removeprefix("STATUS "))
						except json.JSONDecodeError:
							publish_output(line)
						else:
							if isinstance(parsed_status, dict):
								if game_client_id is None:
									events.put(("operation_status", parsed_status))
								else:
									events.put(
										(
											"game_operation_status",
											(game_client_id, parsed_status),
										)
									)
							else:
								publish_output(line)
					elif line.startswith("PROGRESS "):
						try:
							parsed = json.loads(line.removeprefix("PROGRESS "))
						except json.JSONDecodeError:
							publish_output(line)
						else:
							if isinstance(parsed, dict):
								progress_updates.publish(parsed)
							else:
								publish_output(line)
					else:
						publish_output(line)
					if game_client_id is not None and line.startswith("Game window created;"):
						events.put(
							(
								"game_operation_status",
								(
									game_client_id,
									{
										"step": 4,
										"total": LAUNCH_STAGE_TOTAL,
										"message": "Game client started.",
									},
								),
							)
						)
						events.put(("game_started", game_client_id))
					if game_client_id is not None and line.startswith(
						("Game window ready:", "Rendered game frame:")
					):
						events.put(("game_window_ready", game_client_id))
			returncode = process.wait()
			if game_client_id is not None:
				game_launch_supervisors.detach(game_client_id, process)
			if game_client_id is None:
				events.put(
					("launcher_update_done" if restart_on_success else "done", returncode)
				)
			else:
				events.put(("game_done", (game_client_id, returncode)))

		threading.Thread(
			target=worker,
			name=(
				f"ptlinux-game-client-{game_client_id}"
				if game_client_id is not None
				else "ptlinux-operation"
			),
			daemon=True,
		).start()

	def open_article(url: str) -> None:
		try:
			launch_external_url(url)
		except DashboardError as error:
			append_log(f"Could not open external link: {error}")
			show_themed_dialog(
				root,
				title="Open web link",
				message=str(error),
				kind="error",
				window_icon=window_icon,
			)

	def scroll_news_view(event: object) -> str | None:
		if active_news_tab != "patches":
			return None
		delta = getattr(event, "delta", 0)
		button = getattr(event, "num", None)
		if isinstance(delta, int) and delta:
			direction = -1 if delta > 0 else 1
		elif button == 4:
			direction = -1
		elif button == 5:
			direction = 1
		else:
			return None
		news_canvas.yview_scroll(direction * 3, "units")
		return "break"

	def make_news_card_clickable(
		card: tk.Frame,
		url: str,
		*,
		border_only: bool = False,
	) -> None:
		def enter(_event: object) -> None:
			card.configure(highlightbackground="#e4a34c", highlightthickness=1)
			if not border_only:
				card.configure(background="#2a1e17")

		def leave(_event: object) -> None:
			card.configure(highlightbackground="#4a3528", highlightthickness=1)
			if not border_only:
				card.configure(background="#211916")

		def open_card(_event: object) -> None:
			open_article(url)

		def activate_card(_event: object) -> str:
			open_article(url)
			return "break"

		def bind_widget(widget: object) -> None:
			bind = getattr(widget, "bind")
			configure = getattr(widget, "configure")
			bind("<Enter>", enter)
			bind("<Leave>", leave)
			bind("<Button-1>", open_card)
			bind("<MouseWheel>", scroll_news_view, "+")
			bind("<Button-4>", scroll_news_view, "+")
			bind("<Button-5>", scroll_news_view, "+")
			configure(cursor="hand2")
			for child in getattr(widget, "winfo_children")():
				bind_widget(child)

		card.configure(takefocus=True)
		card.bind("<FocusIn>", enter)
		card.bind("<FocusOut>", leave)
		card.bind("<Return>", activate_card)
		card.bind("<space>", activate_card)
		bind_widget(card)

	def show_broadcast(broadcast: Broadcast | None) -> None:
		for child in broadcast_content.winfo_children():
			child.destroy()
		if broadcast is None:
			ttk.Label(
				broadcast_content,
				text="No current broadcast is available.",
				style="Muted.TLabel",
			).pack(anchor="w", padx=8, pady=6)
			return
		card = tk.Frame(
			broadcast_content,
			background="#211916",
			highlightbackground="#4a3528",
			highlightthickness=1,
			padx=10,
			pady=8,
		)
		card.pack(fill="x")
		meta = " · ".join(
			part for part in (f"BROADCAST · {broadcast.author}", broadcast.published_at) if part
		)
		tk.Label(
			card,
			text=meta,
			background="#211916",
			foreground="#e5b66c",
			font=("Sans", 9, "bold"),
		).pack(anchor="w")
		tk.Label(
			card,
			text=broadcast.content,
			background="#211916",
			foreground="#e8ded2",
			font=("Sans", 10),
			wraplength=930,
			justify="left",
			anchor="w",
		).pack(anchor="w", fill="x", pady=(3, 0))
		make_news_card_clickable(card, broadcast.url)

	def layout_news_cards() -> None:
		nonlocal news_layout_columns
		columns = news_card_columns(max(1, root.winfo_width()), launcher_ui_scale)
		news_layout_columns = columns
		for column in range(MAX_NEWS_CARDS):
			news_content.grid_columnconfigure(
				column,
				weight=1 if column < columns else 0,
				uniform="news-card" if column < columns else "",
			)
		for row in range(MAX_NEWS_CARDS):
			news_content.grid_rowconfigure(row, weight=0)
		for index, card in enumerate(news_card_widgets):
			row, column = divmod(index, columns)
			news_content.grid_rowconfigure(row, weight=1)
			card.grid(
				row=row,
				column=column,
				sticky="nsew",
				padx=3,
				pady=3,
			)
		root.after_idle(update_news_viewport)

	def render_news(articles: tuple[NewsArticle, ...]) -> None:
		nonlocal rendered_news_articles
		visible_articles = articles[:MAX_NEWS_CARDS]
		if rendered_news_articles == visible_articles:
			return
		news_image_targets.clear()
		news_image_references.clear()
		news_card_widgets.clear()
		for child in news_content.winfo_children():
			child.destroy()
		for column in range(MAX_NEWS_CARDS):
			news_content.grid_columnconfigure(column, weight=0, uniform="")
		for row in range(MAX_NEWS_CARDS):
			news_content.grid_rowconfigure(row, weight=0)
		if not visible_articles:
			ttk.Label(
				news_content,
				text="Official news is temporarily unavailable. Your cached game can still play.",
				style="Muted.TLabel",
			).pack(anchor="w", padx=8, pady=8)
			startup_news_images_pending.clear()
			mark_startup_component_ready(
				"news_artwork",
				"News layout ready",
			)
			rendered_news_articles = visible_articles
			return
		for index, article in enumerate(visible_articles):
			card = tk.Frame(
				news_content,
				background="#211916",
				highlightbackground="#4a3528",
				highlightthickness=1,
				height=news_card_height,
				padx=8,
				pady=8,
			)
			card.grid_propagate(False)
			news_card_widgets.append(card)
			image_canvas = tk.Canvas(
				card,
				background="#211916",
				width=news_image_width,
				height=news_image_height,
				highlightthickness=0,
				borderwidth=0,
			)
			image_canvas.pack(fill="x")
			image_canvas.create_text(
				news_image_width // 2,
				news_image_height // 2,
				text="Loading official artwork…" if article.image_url else "Official news",
				fill="#a8998a",
				font=("Sans", 9),
				tags=("centered-content",),
			)
			image_canvas.bind(
				"<Configure>",
				lambda event: event.widget.coords(
					"centered-content",
					max(1, int(event.width)) // 2,
					max(1, int(event.height)) // 2,
				),
			)
			if article.image_url:
				news_image_targets[article.id] = image_canvas
			ttk.Label(
				card,
				text=article.title,
				style="NewsTitle.TLabel",
				wraplength=news_image_width,
				justify="left",
			).pack(anchor="w", fill="x", pady=(6, 0))
			meta = article.published_at
			if meta:
				ttk.Label(card, text=meta, style="NewsMeta.TLabel").pack(anchor="w", pady=(2, 4))
			tk.Label(
				card,
				text=article.summary,
				background="#211916",
				foreground="#c9baaa",
				font=("Sans", 9),
				wraplength=news_image_width,
				justify="left",
				height=3,
				anchor="nw",
			).pack(anchor="w", fill="x")
			make_news_card_clickable(card, article.url)
		layout_news_cards()
		load_news_images(visible_articles)
		rendered_news_articles = visible_articles

	def show_news(articles: tuple[NewsArticle, ...]) -> None:
		render_news(articles)

	def append_patch_note(patch: PatchNote) -> Iterator[None]:
		card = tk.Frame(
			patches_content,
			background="#211916",
			highlightbackground="#4a3528",
			highlightthickness=1,
			padx=16,
			pady=13,
		)
		card.pack(fill="x", padx=4, pady=(4, 9))
		tk.Label(
			card,
			text=patch.title,
			background="#211916",
			foreground="#fff0d2",
			font=("Sans", 12, "bold"),
			wraplength=patch_card_wrap_length,
			justify="left",
			anchor="w",
		).pack(anchor="w", fill="x")
		metadata = tk.Frame(card, background="#211916")
		metadata.pack(anchor="w", fill="x", pady=(7, 0))
		tk.Label(
			metadata,
			text=f"VERSION {patch.version or '—'}",
			background="#30231d",
			foreground="#d8aa61",
			font=("Sans", 8, "bold"),
			padx=6,
			pady=2,
		).pack(side="left", padx=(0, 7))
		for tag in patch.tags or ("general",):
			tk.Label(
				metadata,
				text=tag.upper(),
				background="#2a201c",
				foreground="#d8aa61",
				font=("Sans", 7, "bold"),
				padx=6,
				pady=2,
			).pack(side="left", padx=(0, 7))
		if patch.published_at:
			tk.Label(
				metadata,
				text=patch.published_at,
				background="#211916",
				foreground="#c9baaa",
				font=("Sans", 8),
			).pack(side="right")
		tk.Label(
			card,
			text=patch.summary or "No summary provided.",
			background="#211916",
			foreground="#ded1c4",
			font=("Sans", 10),
			wraplength=patch_card_wrap_length,
			justify="left",
			anchor="w",
		).pack(anchor="w", fill="x", pady=(9, 3))
		if not patch.sections:
			tk.Label(
				card,
				text="No detailed changes were published for this patch.",
				background="#211916",
				foreground="#ded1c4",
				font=("Sans", 9),
			).pack(anchor="w", pady=(8, 0))
		yield
		for section in patch.sections:
			tk.Label(
				card,
				text=section.title.upper(),
				background="#211916",
				foreground="#d8aa61",
				font=("Sans", 9, "bold"),
			).pack(anchor="w", pady=(12, 5))
			yield
			for change in section.items:
				change_row = tk.Frame(card, background="#211916")
				change_row.pack(anchor="w", fill="x", pady=3)
				badge_background, badge_foreground = patch_change_colors(
					change.type_key
				)
				tk.Label(
					change_row,
					text=patch_change_tag(change.type_key),
					background=badge_background,
					foreground=badge_foreground,
					font=("Sans", 8, "bold"),
					width=14,
					anchor="center",
					padx=5,
					pady=2,
				).pack(side="left", anchor="n", padx=(0, 8))
				tk.Label(
					change_row,
					text=change.text,
					background="#211916",
					foreground="#ded1c4",
					font=("Sans", 10),
					wraplength=patch_change_wrap_length,
					justify="left",
					anchor="w",
				).pack(side="left", anchor="w", fill="x", expand=True)
				yield
		make_news_card_clickable(card, patch.url, border_only=True)

	def render_patch_notes(
		patches: tuple[PatchNote, ...],
		*,
		on_complete: Callable[[], None] | None = None,
	) -> None:
		"""Preload patch cards incrementally without blocking Tk's event loop."""

		nonlocal patch_render_generation, patch_render_target, rendered_patch_notes
		visible_patches = patches[:MAX_PATCH_NOTES]
		if rendered_patch_notes == visible_patches:
			if on_complete is not None:
				on_complete()
			return
		if patch_render_target == visible_patches:
			if on_complete is not None:
				patch_render_callbacks.append(on_complete)
			return

		patch_render_generation += 1
		generation = patch_render_generation
		patch_render_target = visible_patches
		if on_complete is not None:
			patch_render_callbacks.append(on_complete)
		rendered_patch_notes = None
		for child in patches_content.winfo_children():
			child.destroy()
		patches_content.grid()
		if active_news_tab == "patches":
			patches_content.tkraise()
		else:
			news_content.tkraise()

		def finish_render() -> None:
			nonlocal patch_render_target, rendered_patch_notes
			if generation != patch_render_generation:
				return
			rendered_patch_notes = visible_patches
			patch_render_target = None
			if active_news_tab == "patches":
				patches_content.grid()
				patches_content.tkraise()
			else:
				patches_content.grid_remove()
				news_content.tkraise()
			news_canvas.configure(scrollregion=news_canvas.bbox("all"))
			callbacks = tuple(patch_render_callbacks)
			patch_render_callbacks.clear()
			for callback in callbacks:
				callback()

		if not visible_patches:
			ttk.Label(
				patches_content,
				text=(
					"Official patch notes are temporarily unavailable. "
					"Your cached game can still play."
				),
				style="Muted.TLabel",
			).pack(anchor="w", padx=8, pady=8)
			root.after(PATCH_PRELOAD_INTERVAL_MILLISECONDS, finish_render)
			return

		def patch_render_steps() -> Iterator[None]:
			for patch in visible_patches:
				yield from append_patch_note(patch)

		render_steps = patch_render_steps()

		def append_next() -> None:
			if generation != patch_render_generation:
				return
			try:
				next(render_steps)
			except StopIteration:
				finish_render()
				return
			patches_content.update_idletasks()
			root.after(
				PATCH_PRELOAD_INTERVAL_MILLISECONDS,
				append_next,
			)

		root.after(PATCH_PRELOAD_INTERVAL_MILLISECONDS, append_next)

	def show_patch_notes(
		patches: tuple[PatchNote, ...],
		*,
		on_complete: Callable[[], None] | None = None,
	) -> None:
		render_patch_notes(patches, on_complete=on_complete)

	def switch_news_tab(tab: str) -> None:
		nonlocal active_news_tab
		if tab not in {"news", "patches"} or tab == active_news_tab:
			return
		active_news_tab = tab
		news_tab_button.configure(
			style="NewsTabActive.TButton" if tab == "news" else "NewsTab.TButton"
		)
		patches_tab_button.configure(
			style=(
				"NewsTabActive.TButton" if tab == "patches" else "NewsTab.TButton"
			)
		)
		news_canvas.yview_moveto(0.0)
		if tab == "patches":
			news_content.grid_remove()
			patches_content.grid()
			news_scrollbar.grid()
		else:
			patches_content.grid_remove()
			news_content.grid()
			news_scrollbar.grid_remove()
		root.after_idle(update_news_viewport)

	def switch_news_tab_from_keyboard(tab: str, button: ttk.Button) -> str:
		switch_news_tab(tab)
		button.focus_set()
		return "break"

	news_tab_button.configure(command=lambda: switch_news_tab("news"))
	patches_tab_button.configure(command=lambda: switch_news_tab("patches"))

	def load_news_images(articles: tuple[NewsArticle, ...]) -> None:
		image_articles = tuple(
			article for article in articles if article.image_url is not None
		)
		startup_news_images_pending.clear()
		startup_news_images_pending.update(article.id for article in image_articles)
		if startup_news_images_pending:
			set_startup_component_pending("news_artwork")
		else:
			mark_startup_component_ready(
				"news_artwork",
				"News artwork ready",
			)

		def worker(news_article: NewsArticle) -> None:
			image = (
				read_cached_news_image(news_article, paths.news_image_cache)
				if startup_settings.low_bandwidth_mode
				else fetch_news_image(news_article, paths.news_image_cache)
			)
			events.put(("news_image", (news_article.id, image)))

		for article in image_articles:
			threading.Thread(
				target=worker,
				args=(article,),
				name="ptlinux-news-image",
				daemon=True,
			).start()

	def install_news_image(value: object) -> None:
		if (
			not isinstance(value, tuple)
			or len(value) != 2
			or not isinstance(value[0], int)
			or (value[1] is not None and not isinstance(value[1], bytes))
		):
			return
		article_id, image_data = value
		target = news_image_targets.get(article_id)
		if target is None or not target.winfo_exists():
			return
		if image_data is None:
			target.delete("all")
			target.create_text(
				news_image_width // 2,
				news_image_height // 2,
				text="Artwork unavailable",
				fill="#a8998a",
				font=("Sans", 8),
				tags=("centered-content",),
			)
			return
		try:
			image = tk.PhotoImage(data=base64.b64encode(image_data), format="png")
		except tk.TclError:
			target.delete("all")
			target.create_text(
				news_image_width // 2,
				news_image_height // 2,
				text="Artwork unavailable",
				fill="#a8998a",
				font=("Sans", 8),
				tags=("centered-content",),
			)
			return
		target_width = target.winfo_width()
		target_height = target.winfo_height()
		if target_width <= 1:
			target_width = news_image_width
		if target_height <= 1:
			target_height = news_image_height
		if image.width() < target_width or image.height() < target_height:
			factor = max(
				math.ceil(target_width / image.width()),
				math.ceil(target_height / image.height()),
			)
			image = image.zoom(factor, factor)
		else:
			factor = min(image.width() // target_width, image.height() // target_height)
			if factor > 1:
				image = image.subsample(factor, factor)
		news_image_references[article_id] = image
		target.delete("all")
		target.create_image(
			target_width // 2,
			target_height // 2,
			image=image,
			tags=("centered-content",),
		)

	def complete_news_image(value: object) -> None:
		install_news_image(value)
		if not isinstance(value, tuple) or not value or not isinstance(value[0], int):
			return
		startup_news_images_pending.discard(value[0])
		if not startup_news_images_pending:
			mark_startup_component_ready(
				"news_artwork",
				"News artwork ready",
			)

	def settle_pending_news_artwork() -> None:
		for article_id in tuple(startup_news_images_pending):
			target = news_image_targets.get(article_id)
			if target is None or not target.winfo_exists():
				continue
			target.delete("all")
			target.create_text(
				news_image_width // 2,
				news_image_height // 2,
				text="Artwork unavailable",
				fill="#a8998a",
				font=("Sans", 8),
				tags=("centered-content",),
			)
		startup_news_images_pending.clear()

	def install_official_logo(value: object) -> None:
		if not isinstance(value, bytes):
			return
		try:
			image = tk.PhotoImage(data=base64.b64encode(value), format="png")
		except tk.TclError:
			return
		factor = max(1, math.ceil(image.width() / 42), math.ceil(image.height() / 42))
		if factor > 1:
			image = image.subsample(factor, factor)
		logo_image_references.clear()
		logo_image_references.append(image)
		logo.delete("all")
		logo.create_image(21, 21, image=image)

	def load_official_logo() -> None:
		def worker() -> None:
			image = (
				read_cached_official_logo(paths.logo_cache)
				if startup_settings.low_bandwidth_mode
				else fetch_official_logo(paths.logo_cache)
			)
			events.put(("logo_image", image))

		threading.Thread(target=worker, name="ptlinux-logo", daemon=True).start()

	def update_server_status_debug_text() -> None:
		value = ""
		if show_dashboard_debug:
			value = (
				server_status_check_text(latest_server_status_check)
				if latest_server_status_check is not None
				else "status check pending"
			)
		if server_status_debug_text.get() != value:
			server_status_debug_text.set(value)

	def render_server_status() -> None:
		update_server_status_debug_text()
		render_server_status_component(
			server_status_content,
			ttk=ttk,
			statuses=latest_server_statuses,
			start_options=available_start_options,
			placeholder=server_status_placeholder,
			show_debug_details=show_dashboard_debug,
		)

	def show_server_status(
		check: ServerStatusCheck,
	) -> None:
		nonlocal latest_server_statuses, latest_server_status_check
		nonlocal server_status_placeholder
		latest_server_status_check = check
		latest_server_statuses = check.statuses
		server_status_placeholder = (
			"Server status unavailable."
			if check.error is not None
			else "Official status is unavailable for this realm."
		)
		render_server_status()

	def refresh_dashboard_debug_disk_state() -> None:
		nonlocal dashboard_runtime_debug, dashboard_verification_debug
		nonlocal dashboard_debug_state_error
		dashboard_debug_state_error = None
		try:
			settings = load_settings(paths)
		except (OSError, ValueError) as error:
			dashboard_runtime_debug = None
			dashboard_debug_state_error = f"settings unavailable: {error}"
		else:
			dashboard_runtime_debug = inspect_runtime_debug(paths, settings)
		try:
			dashboard_verification_debug = read_verification_debug(paths)
		except OSError as error:
			dashboard_verification_debug = None
			detail = f"verification state unavailable: {error}"
			dashboard_debug_state_error = (
				f"{dashboard_debug_state_error}; {detail}"
				if dashboard_debug_state_error
				else detail
			)

	def current_debug_start_option() -> DepotStartOption | None:
		selected_name = realm_value.get().casefold()
		return next(
			(
				option
				for option in available_start_options
				if option.name.casefold() == selected_name
			),
			None,
		)

	def dashboard_debug_report() -> str:
		lines = ["PT-LINUX DASHBOARD DEBUG", ""]
		lines.extend(("SERVERS", "-------"))
		lines.append(
			server_status_check_text(latest_server_status_check)
			if latest_server_status_check is not None
			else "status check pending"
		)
		if latest_server_statuses:
			lines.extend(
				server_status_presentation(
					server,
					show_debug_details=True,
				).text
				for server in latest_server_statuses
			)
		else:
			lines.append(server_status_placeholder)

		lines.extend(("", "LAUNCH", "------"))
		start_option = current_debug_start_option()
		lines.append(f"Realm: {realm_value.get() or 'unknown'}")
		lines.append(
			f"Executable: {start_option.path if start_option is not None else 'unknown'}"
		)
		lines.append(
			f"Arguments: {start_option.arguments if start_option is not None else 'unknown'}"
		)
		if official_snapshot is None:
			lines.append("Official depot: unavailable")
		else:
			lines.append(
				f"Official depot: build {official_snapshot.build} · "
				f"version {official_snapshot.version}"
			)
		if latest_installation_status is None:
			lines.append("Installed depot: unchecked")
		else:
			local_build = latest_installation_status.local_build
			lines.append(
				f"Installed depot: {local_build if local_build is not None else 'unknown'}"
			)

		client_states = game_clients.debug_states()
		active_runtime = next(
			(
				client_runtime_debug[state.client_id]
				for state in client_states
				if state.client_id in client_runtime_debug
			),
			dashboard_runtime_debug,
		)
		lines.extend(("", "RUNTIME", "-------"))
		lines.append(
			"Source: active client launch snapshot"
			if client_states and active_runtime is not dashboard_runtime_debug
			else "Source: next-launch selection"
		)
		if active_runtime is None:
			lines.append(dashboard_debug_state_error or "Runtime state unavailable")
		else:
			lines.append(
				f"Requested / selected: {active_runtime.requested_kind} / "
				f"{active_runtime.selected_kind or 'unavailable'}"
			)
			lines.append(f"Runtime executable: {active_runtime.executable or 'unavailable'}")
			lines.append(f"Proton: {active_runtime.proton_path or 'not applicable'}")
			lines.append(f"Prefix: {active_runtime.prefix or 'unavailable'}")
			lines.append(
				f"Synchronization: {active_runtime.sync_configured} / "
				f"{active_runtime.sync_effective or 'runtime managed'}"
			)
			lines.append(
				f"Prepared runtime: {active_runtime.prepared_kind or 'not recorded'} · "
				f"{active_runtime.prepared_at or 'time unavailable'}"
			)
			if active_runtime.prepared_proton_path is not None:
				lines.append(f"Prepared Proton: {active_runtime.prepared_proton_path}")
			marker_match = active_runtime.marker_matches_selection
			lines.append(
				"Preparation marker matches selection: "
				+ (
					"yes"
					if marker_match is True
					else "no"
					if marker_match is False
					else "unknown"
				)
			)
			lines.append(
				f"DXVK D3D9 override: "
				f"{active_runtime.dxvk_d3d9_override or 'not recorded'}"
			)
			lines.append(f"DXVK state cache: {paths.dxvk_cache}")
			if active_runtime.error:
				lines.append(f"Runtime selection error: {active_runtime.error}")

		lines.extend(("", "CLIENTS", "-------"))
		lines.append(
			f"Starting: {game_clients.starting_count} · "
			f"running: {game_clients.running_count}"
		)
		if not client_states:
			lines.append("No active game clients")
		for state in client_states:
			pid = str(state.supervisor_pid) if state.supervisor_pid is not None else "pending"
			lines.append(
				f"Client {state.client_id}: {state.phase} · "
				f"{debug_elapsed_text(state.elapsed_seconds)} · supervisor PID {pid}"
			)
			client_runtime = client_runtime_debug.get(state.client_id)
			if client_runtime is not None:
				lines.append(
					f"  runtime {client_runtime.selected_kind or 'unavailable'} · "
					f"prefix {client_runtime.prefix or 'unavailable'}"
				)
			if state.client_id == active_game_launch_id and operation_stage_total > 0:
				lines.append(
					f"  launch stage {operation_stage}/{operation_stage_total} · "
					f"{operation_message or 'waiting'}"
				)
		if operation_active and active_game_launch_id is None:
			lines.append(
				f"Launcher operation: {operation_stage}/{operation_stage_total} · "
				f"{operation_message or status.get()}"
			)

		lines.extend(("", "VERIFICATION", "------------"))
		verification = dashboard_verification_debug
		if verification is None:
			lines.append(dashboard_debug_state_error or "Verification state unavailable")
		else:
			lines.append(f"Imported-tree trust: {verification.import_state}")
			if verification.import_verified_at is not None:
				lines.append(
					f"Import verified: build "
					f"{verification.import_build if verification.import_build is not None else 'unknown'} · "
					f"{verification.import_verified_at}"
				)
			lines.append(
				f"Last full verification: "
				f"{verification.last_full_verification_at or 'not recorded'}"
			)
			lines.append(
				f"Last depot sync: {verification.last_sync_at or 'not recorded'} · "
				f"{verification.mode or 'mode unknown'}"
			)
			lines.append(
				f"Cached integrity: build "
				f"{verification.build if verification.build is not None else 'unknown'} · "
				f"version {verification.version or 'unknown'} · "
				f"{verification.files_total if verification.files_total is not None else '?'} files"
			)
			lines.append(
				"Last sync changes: "
				f"downloaded {verification.files_downloaded if verification.files_downloaded is not None else '?'} · "
				f"deleted {verification.files_deleted if verification.files_deleted is not None else '?'} · "
				f"created {verification.files_created if verification.files_created is not None else '?'} · "
				f"quarantined {verification.files_quarantined if verification.files_quarantined is not None else '?'}"
			)
		if latest_installation_status is not None:
			missing = latest_installation_status.missing_files
			lines.append(
				"Required files: complete"
				if not missing
				else "Required files missing: " + ", ".join(str(path) for path in missing)
			)
		return "\n".join(lines) + "\n"

	def update_dashboard_debug_view(*, force: bool = False) -> None:
		nonlocal last_dashboard_debug_render
		if (
			not show_dashboard_debug
			or dashboard_debug_output is None
			or not dashboard_debug_output.winfo_exists()
		):
			return
		rendered = dashboard_debug_report()
		if not force and rendered == last_dashboard_debug_render:
			return
		position = dashboard_debug_output.yview()[0]
		dashboard_debug_output.configure(state="normal")
		dashboard_debug_output.delete("1.0", "end")
		dashboard_debug_output.insert("1.0", rendered)
		dashboard_debug_output.configure(state="disabled")
		dashboard_debug_output.yview_moveto(position)
		last_dashboard_debug_render = rendered

	def ensure_dashboard_debug_window() -> None:
		nonlocal dashboard_debug_window, dashboard_debug_output
		if dashboard_debug_window is not None and dashboard_debug_window.winfo_exists():
			return
		window = tk.Toplevel(root)
		dashboard_debug_window = window
		window.title("PristonTale EU — Debug View")
		window.geometry("900x640")
		window.minsize(700, 440)
		window.configure(background="#0c0908")
		apply_window_icon(window)
		debug_header = tk.Frame(window, background="#24170f", padx=16, pady=12)
		debug_header.pack(fill="x")
		tk.Label(
			debug_header,
			text="DASHBOARD DEBUG VIEW",
			background="#24170f",
			foreground="#f5d18b",
			font=("Sans", 10, "bold"),
		).pack(anchor="w")
		tk.Label(
			debug_header,
			text="Read-only live launcher, runtime, client, and trust state",
			background="#24170f",
			foreground="#c9baaa",
			font=("Sans", 9),
		).pack(anchor="w", pady=(2, 0))
		body = tk.Frame(window, background="#0c0908")
		body.pack(fill="both", expand=True, padx=12, pady=12)
		body.grid_rowconfigure(0, weight=1)
		body.grid_columnconfigure(0, weight=1)
		output = tk.Text(
			body,
			background="#100d0c",
			foreground="#ded1c4",
			insertbackground="#f8fafc",
			font=("Monospace", 10),
			wrap="none",
			state="disabled",
			padx=12,
			pady=10,
			relief="flat",
		)
		dashboard_debug_output = output
		vertical = ttk.Scrollbar(body, orient="vertical", command=output.yview)
		horizontal = ttk.Scrollbar(body, orient="horizontal", command=output.xview)
		output.configure(yscrollcommand=vertical.set, xscrollcommand=horizontal.set)
		output.grid(row=0, column=0, sticky="nsew")
		vertical.grid(row=0, column=1, sticky="ns")
		horizontal.grid(row=1, column=0, sticky="ew")
		window.protocol("WM_DELETE_WINDOW", lambda: set_dashboard_debug(False))

	def set_dashboard_debug(enabled: bool) -> None:
		nonlocal show_dashboard_debug, last_dashboard_debug_render
		show_dashboard_debug = enabled
		last_dashboard_debug_render = ""
		if enabled:
			refresh_dashboard_debug_disk_state()
			ensure_dashboard_debug_window()
			assert dashboard_debug_window is not None
			dashboard_debug_window.deiconify()
			dashboard_debug_window.lift()
			dashboard_debug_window.focus_set()
		else:
			if dashboard_debug_window is not None and dashboard_debug_window.winfo_exists():
				dashboard_debug_window.withdraw()
		render_server_status()
		update_dashboard_debug_view(force=True)

	def toggle_dashboard_debug(_event: object | None = None) -> str:
		set_dashboard_debug(not show_dashboard_debug)
		return "break"

	root.bind_all(
		DASHBOARD_DEBUG_KEY,
		toggle_dashboard_debug,
		add="+",
	)

	def install_realm_options(snapshot: DepotSnapshot) -> None:
		nonlocal available_start_options, preferred_realm
		catalog = launch_catalog_from_snapshot(snapshot)
		available_start_options = catalog.start_options
		selected = select_depot_start_option(catalog, preferred_realm)
		realm_selector.configure(
			values=tuple(option.name for option in available_start_options),
			state="disabled" if operation_active else "readonly",
		)
		realm_value.set(selected.name)
		if selected.name != preferred_realm:
			preferred_realm = selected.name
			try:
				update_settings(paths, realm=selected.name)
			except (OSError, ValueError) as save_error:
				append_log(f"Could not save the selected realm: {save_error}")
		render_server_status()

	def on_realm_selected(_event: object | None = None) -> None:
		nonlocal preferred_realm
		selected_name = realm_value.get()
		selected = next(
			(
				option
				for option in available_start_options
				if option.name.casefold() == selected_name.casefold()
			),
			None,
		)
		if selected is None:
			fallback = select_depot_start_option(
				launch_catalog_from_snapshot(official_snapshot)
				if official_snapshot is not None
				else None,
				preferred_realm,
			)
			realm_value.set(fallback.name)
			return
		realm_value.set(selected.name)
		if preferred_realm == selected.name:
			return
		preferred_realm = selected.name
		try:
			update_settings(paths, realm=selected.name)
		except (OSError, ValueError) as save_error:
			append_log(f"Could not save the selected realm: {save_error}")

	realm_selector.bind("<<ComboboxSelected>>", on_realm_selected)

	def refresh_primary_action(
		snapshot: DepotSnapshot | None = None,
		*,
		installation: GameInstallationStatus | None = None,
		update_activity: bool = True,
	) -> GameInstallationStatus:
		nonlocal official_snapshot, latest_installation_status
		if snapshot is not None:
			official_snapshot = snapshot
		if installation is None:
			installation = inspect_game_installation(
				paths,
				official_snapshot.build if official_snapshot is not None else None,
				compatibility_ready=(
					runtime_compatibility.compatible
					if runtime_compatibility is not None
					else None
				),
			)
		latest_installation_status = installation
		additional_client_ready = game_clients.running_count > 0 and installation.installed
		client_activity_text.set(game_client_activity_text(game_clients.running_count))
		refresh_activity_meta_text()
		play_button.configure(
			text="PLAY" if additional_client_ready else installation.action.value
		)
		if not operation_active:
			play_button.configure(
				state=(
					"disabled"
					if (
						installation.action is PrimaryAction.CHECKING
						and not additional_client_ready
					)
					else "normal"
				),
			)
		if not update_activity or operation_active:
			return installation
		if additional_client_ready:
			status.set("Ready for another account.")
			progress_text.set("Click Play to open another game window.")
		elif installation.action is PrimaryAction.INSTALL:
			status.set("Game is not installed.")
			progress_text.set("Click Install to download and verify the official game files.")
		elif installation.action is PrimaryAction.UPDATE:
			status.set("A game update is available.")
			official_build = installation.official_build
			if official_build is None:
				progress_text.set("Local game files need an official build check.")
			elif installation.local_build is None:
				progress_text.set(
					f"Local files need verification · official depot {official_build}"
				)
			else:
				progress_text.set(
					f"Installed depot {installation.local_build} · "
					f"official depot {official_build}"
				)
		elif installation.action is PrimaryAction.CHECKING:
			status.set("Checking game compatibility…")
			progress_text.set("The installed release is being inspected without modifying it.")
		elif installation.action is PrimaryAction.LAUNCHER_UPDATE:
			status.set("Launcher compatibility update required.")
			progress_text.set("This installed game release is not recognized by the launcher.")
		else:
			status.set("Ready")
			progress_text.set("Click Play to start your journey")
		return installation

	def refresh_runtime_compatibility(*, update_activity: bool = True) -> None:
		nonlocal compatibility_check_generation, runtime_compatibility
		compatibility_check_generation += 1
		check_generation = compatibility_check_generation
		runtime_compatibility = None
		local_status = inspect_game_installation(
			paths,
			official_snapshot.build if official_snapshot is not None else None,
			compatibility_ready=None,
		)
		refresh_primary_action(
			installation=local_status,
			update_activity=update_activity,
		)
		if not local_status.installed or game_import_requires_verification(paths):
			mark_startup_component_ready(
				"compatibility",
				"Game state ready",
			)
			return

		def worker() -> None:
			result = inspect_runtime_compatibility(paths, paths.source_game)
			events.put(
				(
					"compatibility",
					(check_generation, result, update_activity),
				)
			)

		threading.Thread(
			target=worker,
			name="ptlinux-compatibility",
			daemon=True,
		).start()

	def show_launcher_update_check(
		check: LauncherUpdateCheck,
		*,
		log_reason: bool = True,
	) -> None:
		nonlocal launcher_update_check
		launcher_update_check = check
		presentation = launcher_update_presentation(check)
		launcher_update_button.configure(
			text=presentation.button_text,
			style=presentation.button_style,
			state=(
				"disabled"
				if operation_active or game_clients.running_count
				else "normal"
			),
		)
		if presentation.badge_text is not None:
			launcher_update_badge.configure(text=presentation.badge_text)
			if not launcher_update_badge.winfo_manager():
				launcher_update_badge.pack(side="right")
		else:
			launcher_update_badge.pack_forget()
		if log_reason:
			append_log(check.reason)
		if launcher_update_dialog is not None:
			launcher_update_dialog.refresh()

	def refresh_launcher_update_check() -> None:
		def worker() -> None:
			try:
				check = check_for_launcher_update()
			except RuntimeError as update_error:
				events.put(("launcher_update_error", str(update_error)))
			else:
				cache_launcher_update_check(paths.launcher_update_check_cache, check)
				events.put(("launcher_update_check", check))

		threading.Thread(
			target=worker,
			name="ptlinux-self-update",
			daemon=True,
		).start()

	def refresh_remote_content() -> None:
		def broadcast_worker() -> None:
			events.put(("broadcast", fetch_latest_broadcast(paths.broadcast_cache)))

		def news_worker() -> None:
			events.put(("news", fetch_news(paths.news_cache)))

		def patches_worker() -> None:
			events.put(("patches", fetch_patch_notes(paths.patches_cache)))

		def server_status_worker() -> None:
			events.put(("server_status_check", perform_server_status_check()))

		def version_worker() -> None:
			try:
				snapshot = DepotClient().fetch_snapshot()
			except DepotError as remote_error:
				events.put(("version_error", str(remote_error)))
			else:
				try:
					cache_depot_launch_catalog(paths.depot_launch_catalog_cache, snapshot)
				except OSError as cache_error:
					events.put(
						(
							"output",
							f"Could not cache official realm choices: {cache_error}\n",
						)
					)
				events.put(("version", snapshot))

		if startup_settings.low_bandwidth_mode:
			append_log(
				"Low-bandwidth mode: using cached news, broadcasts, patch notes, "
				"and artwork."
			)
			for component, message in (
				("broadcast", "Cached broadcast ready"),
				("news", "Cached news ready"),
				("patches", "Cached patch notes ready"),
				("launcher_update", "Cached launcher update status ready"),
			):
				mark_startup_component_ready(component, message)
		else:
			threading.Thread(
				target=broadcast_worker,
				name="ptlinux-broadcast",
				daemon=True,
			).start()
			threading.Thread(
				target=news_worker,
				name="ptlinux-news",
				daemon=True,
			).start()
			threading.Thread(
				target=patches_worker,
				name="ptlinux-patches",
				daemon=True,
			).start()
		threading.Thread(
			target=server_status_worker,
			name="ptlinux-server-status",
			daemon=True,
		).start()
		threading.Thread(target=version_worker, name="ptlinux-version", daemon=True).start()
		if not startup_settings.low_bandwidth_mode:
			refresh_launcher_update_check()

	def start_remote_content_refresh() -> None:
		nonlocal remote_refresh_started
		if remote_refresh_started:
			return
		remote_refresh_started = True
		refresh_remote_content()

	def release_game_launch_controls(
		client_id: int,
		*,
		ready: bool,
		returncode: int | None = None,
		cancelled: bool = False,
	) -> None:
		nonlocal active_game_launch_id
		nonlocal operation_active, game_window_active
		nonlocal operation_refreshes_compatibility, operation_started_at
		if active_game_launch_id != client_id:
			return
		active_game_launch_id = None
		operation_active = False
		game_window_active = game_clients.running_count > 0
		operation_refreshes_compatibility = False
		operation_started_at = None
		progress_updates.clear()
		transfer_rate.reset()
		speed_text.set("")
		set_download_context_text("")
		progress_bar.stop()
		close_game_preloader()
		if not ready:
			root.deiconify()
		set_busy(False)
		refresh_primary_action(update_activity=False)
		if ready:
			status.set("Ready for another account.")
			progress_text.set("Click Play to open another game window.")
			dashboard_chrome.minimize()
		elif cancelled:
			root.lift()
			status.set("Game launch cancelled.")
			progress_text.set("The initiated game and compatibility processes were stopped.")
		else:
			root.lift()
			status.set(
				f"Client {client_id} failed to start"
				+ (f" (exit {returncode})" if returncode is not None else "")
			)
			progress_text.set("See the activity log for details.")

	def finish_operation(returncode: int) -> None:
		nonlocal operation_active, game_window_active
		nonlocal operation_refreshes_compatibility, operation_started_at
		refresh_compatibility = operation_refreshes_compatibility
		operation_active = False
		game_window_active = game_clients.running_count > 0
		operation_refreshes_compatibility = False
		operation_started_at = None
		progress_updates.clear()
		transfer_rate.reset()
		speed_text.set("")
		set_download_context_text("")
		progress_bar.stop()
		close_game_preloader()
		root.deiconify()
		if not game_window_active:
			root.lift()
		set_busy(False)
		if refresh_compatibility:
			refresh_runtime_compatibility(update_activity=returncode == 0)
		else:
			refresh_primary_action(update_activity=returncode == 0)
		if show_dashboard_debug:
			refresh_dashboard_debug_disk_state()
			update_dashboard_debug_view(force=True)
		if returncode != 0:
			status.set(f"Operation failed (exit {returncode})")
			progress_text.set("See the activity log for details.")

	def poll_events() -> None:
		nonlocal game_window_active, launcher_update_check, runtime_compatibility
		processed = 0
		try:
			while processed < EVENT_BATCH_SIZE:
				kind, value = events.get_nowait()
				processed += 1
				if kind == "output" and isinstance(value, str):
					append_log(value)
				elif kind == "done" and isinstance(value, int):
					finish_operation(value)
				elif kind == "launcher_update_done" and isinstance(value, int):
					finish_operation(value)
					if value == 0:
						append_log("Launcher update activated; restarting the dashboard.")
						try:
							restart_command, restart_environment = launcher_restart_spec(paths)
							subprocess.Popen(
								restart_command,
								env=restart_environment,
								close_fds=True,
								start_new_session=True,
							)
						except OSError as restart_error:
							show_themed_dialog(
								root,
								title="Launcher update",
								message=(
									"The update was installed, but the launcher could not "
									f"restart: {restart_error}"
								),
								kind="error",
								window_icon=window_icon,
							)
						else:
							root.destroy()
							return
				elif kind == "operation_status" and isinstance(value, Mapping):
					step = _as_int(value.get("step"))
					total = _as_int(value.get("total"))
					message = value.get("message")
					if step > 0 and total > 0 and isinstance(message, str) and message:
						set_operation_stage(step, total, message)
				elif (
					kind == "game_supervisor_started"
					and isinstance(value, tuple)
					and len(value) == 2
					and isinstance(value[0], int)
					and isinstance(value[1], int)
				):
					game_clients.attach_supervisor(value[0], value[1])
				elif (
					kind == "game_operation_status"
					and isinstance(value, tuple)
					and len(value) == 2
					and isinstance(value[0], int)
					and isinstance(value[1], Mapping)
					and value[0] == active_game_launch_id
					and not game_launch_supervisors.is_cancel_requested(value[0])
				):
					step = _as_int(value[1].get("step"))
					total = _as_int(value[1].get("total"))
					message = value[1].get("message")
					if step > 0 and total > 0 and isinstance(message, str) and message:
						set_operation_stage(step, total, message)
				elif (
					kind == "game_started"
					and isinstance(value, int)
					and not game_launch_supervisors.is_cancel_requested(value)
				):
					launch_settings = client_launch_settings.get(value)
					if launch_settings is not None:
						client_runtime_debug[value] = inspect_runtime_debug(
							paths,
							launch_settings,
						)
					progress_bar.stop()
					status.set(f"Game client {value} started; preparing its window…")
				elif (
					kind == "game_window_ready"
					and isinstance(value, int)
					and not game_launch_supervisors.is_cancel_requested(value)
				):
					if game_clients.mark_running(value):
						game_window_active = True
						release_game_launch_controls(value, ready=True)
				elif (
					kind == "game_done"
					and isinstance(value, tuple)
					and len(value) == 2
					and isinstance(value[0], int)
					and isinstance(value[1], int)
				):
					client_id, returncode = value
					cancelled = game_launch_supervisors.finish(client_id)
					phase = game_clients.finish(client_id)
					client_runtime_debug.pop(client_id, None)
					client_launch_settings.pop(client_id, None)
					game_window_active = game_clients.running_count > 0
					append_log(f"Client {client_id} exited with status {returncode}.")
					if phase == "starting":
						release_game_launch_controls(
							client_id,
							ready=False,
							returncode=returncode,
							cancelled=cancelled,
						)
					elif phase == "running" and not operation_active:
						set_busy(False)
						refresh_primary_action(update_activity=False)
						count = game_clients.running_count
						if count:
							status.set("Ready for another account.")
							progress_text.set("Click Play to open another game window.")
						else:
							status.set("All game clients have closed.")
							progress_text.set("Click Play to start a new client.")
							root.deiconify()
							root.lift()
					if show_dashboard_debug:
						refresh_dashboard_debug_disk_state()
				elif kind == "broadcast":
					show_broadcast(value if isinstance(value, Broadcast) else None)
					mark_startup_component_ready(
						"broadcast",
						"Broadcast ready",
					)
				elif kind == "server_status_check" and isinstance(
					value,
					ServerStatusCheck,
				):
					show_server_status(value)
					if value.error is not None:
						append_log(f"Server status check unavailable: {value.error}")
					mark_startup_component_ready(
						"server_status",
						(
							"Server status ready"
							if value.error is None
							else "Server status check complete"
						),
					)
				elif kind == "news" and isinstance(value, tuple):
					show_news(value)
					mark_startup_component_ready(
						"news",
						"News cards ready",
					)
				elif (
					kind == "patches"
					and isinstance(value, tuple)
					and all(isinstance(item, PatchNote) for item in value)
				):
					show_patch_notes(
						value,
						on_complete=lambda: mark_startup_component_ready(
							"patches",
							"Patch notes ready",
						),
					)
				elif kind == "news_image":
					complete_news_image(value)
				elif kind == "logo_image":
					install_official_logo(value)
					mark_startup_component_ready(
						"logo",
						"Launcher artwork ready",
					)
				elif (
					kind == "compatibility"
					and isinstance(value, tuple)
					and len(value) == 3
					and isinstance(value[0], int)
					and isinstance(value[1], RuntimeCompatibility)
					and isinstance(value[2], bool)
				):
					check_generation, checked, update_activity = value
					if check_generation == compatibility_check_generation:
						runtime_compatibility = checked
						if checked.compatible:
							append_log(
								"Compatibility check passed: "
								f"scene={checked.scene_action}, "
								f"binaries={checked.binary_action}"
							)
						else:
							append_log(
								"Launcher compatibility update required: "
								f"{checked.reason or 'unknown release profile'}"
							)
						refresh_primary_action(update_activity=update_activity)
						mark_startup_component_ready(
							"compatibility",
							"Game compatibility ready",
						)
				elif kind == "version" and isinstance(value, DepotSnapshot):
					version.set(
						f"Launcher {__version__} · {value.version} · depot {value.build}"
					)
					install_realm_options(value)
					refresh_primary_action(value)
					mark_startup_component_ready(
						"version",
						"Game version ready",
					)
				elif kind == "version_error":
					version.set(
						f"Launcher {__version__} · game build check unavailable"
					)
					refresh_primary_action()
					mark_startup_component_ready(
						"version",
						"Game version check complete",
					)
				elif kind == "launcher_update_check" and isinstance(
					value,
					LauncherUpdateCheck,
				):
					show_launcher_update_check(value)
					mark_startup_component_ready(
						"launcher_update",
						"Launcher update status ready",
					)
				elif kind == "launcher_update_error" and isinstance(value, str):
					if launcher_update_check is None:
						launcher_update_button.configure(
							text="CHECK LAUNCHER",
							style="Secondary.TButton",
							state=(
								"disabled"
								if operation_active or game_clients.running_count
								else "normal"
							),
						)
						launcher_update_badge.pack_forget()
					append_log(f"Launcher update check unavailable: {value}")
					if launcher_update_dialog is not None:
						launcher_update_dialog.show_error(value)
					mark_startup_component_ready(
						"launcher_update",
						"Launcher update check complete",
					)
		except queue.Empty:
			pass
		except Exception as event_error:
			append_log(
				"Dashboard event processing recovered from an error: "
				f"{event_error}"
			)
		if operation_active:
			latest_progress = progress_updates.take()
			if latest_progress is not None:
				update_progress(latest_progress)
			if speed_text.get() != "0 B/s" and transfer_rate.is_idle():
				speed_text.set("0 B/s")
			update_elapsed_indicator()
		update_server_status_debug_text()
		update_dashboard_debug_view()
		poll_delay = (
			ACTIVE_POLL_INTERVAL_MILLISECONDS
			if not startup_transition_started
			else dashboard_poll_interval(
				operation_active=operation_active,
				game_window_active=game_window_active,
				pending_events=not events.empty(),
			)
		)
		root.after(poll_delay, poll_events)

	def command_for(*arguments: str) -> list[str]:
		return launcher_child_command(*arguments)

	def install_launcher_and_restart(version_to_install: str) -> None:
		run_operation(
			f"Installing launcher {version_to_install}…",
			command_for("launcher-update"),
			restart_on_success=True,
		)

	def rollback_launcher_and_restart(target_version: str) -> None:
		run_operation(
			f"Rolling back launcher to {target_version}…",
			command_for("launcher-update", "--rollback"),
			restart_on_success=True,
		)

	launcher_update_dialog = LauncherUpdateDialog(
		root,
		paths=paths,
		launcher_version=__version__,
		ui_scale=launcher_ui_scale,
		window_icon=window_icon,
		apply_window_icon=apply_window_icon,
		get_check=lambda: launcher_update_check,
		is_busy=lambda: operation_active or bool(game_clients.running_count),
		request_check=refresh_launcher_update_check,
		install_and_restart=install_launcher_and_restart,
		rollback_and_restart=rollback_launcher_and_restart,
		open_article=open_article,
		append_log=append_log,
	)

	def run_launcher_update(required_reason: str | None = None) -> None:
		assert launcher_update_dialog is not None
		launcher_update_dialog.open(required_reason)

	launcher_update_button.configure(command=run_launcher_update)

	def start_game_client() -> None:
		nonlocal active_game_launch_id
		if official_snapshot is not None:
			try:
				cache_depot_launch_catalog(
					paths.depot_launch_catalog_cache,
					official_snapshot,
				)
			except OSError as cache_error:
				show_themed_dialog(
					root,
					title="Realm selection",
					message=(
						"The launcher could not save the official realm selection:\n\n"
						f"{cache_error}"
					),
					kind="error",
					window_icon=window_icon,
				)
				return
		launch_settings: Settings | None = None
		runtime_debug: RuntimeDebugInfo | None = None
		try:
			loaded_launch_settings = load_settings(paths)
		except (OSError, ValueError) as settings_error:
			append_log(f"Could not inspect launch runtime settings: {settings_error}")
		else:
			launch_settings = loaded_launch_settings
			runtime_debug = inspect_runtime_debug(paths, loaded_launch_settings)
		client_id = game_clients.begin()
		if runtime_debug is not None and launch_settings is not None:
			client_runtime_debug[client_id] = runtime_debug
			client_launch_settings[client_id] = launch_settings
		active_game_launch_id = client_id
		run_operation(
			f"Starting PristonTale EU {realm_value.get()} client {client_id}…",
			command_for("play", "--realm", realm_value.get()),
			show_preloader=True,
			game_client_id=client_id,
		)

	def synchronize_game_files(
		installation: GameInstallationStatus | None = None,
		*,
		repair: bool = False,
	) -> None:
		current = installation or refresh_primary_action(update_activity=False)
		presentation = game_sync_presentation(
			installed=current.installed,
			repair=repair,
		)
		command = (
			command_for("update", "--no-import", "--repair")
			if repair
			else command_for("update")
		)
		run_operation(
			presentation.operation_label,
			command,
			game_files_may_change=True,
			file_progress_verb=presentation.file_progress_verb,
		)

	def run_primary_action() -> None:
		installation = refresh_primary_action(update_activity=False)
		if (
			installation.action is PrimaryAction.PLAY
			or (game_clients.running_count > 0 and installation.installed)
		):
			start_game_client()
		elif installation.action in {PrimaryAction.INSTALL, PrimaryAction.UPDATE}:
			synchronize_game_files(installation)
		elif installation.action is PrimaryAction.LAUNCHER_UPDATE:
			run_launcher_update(
				runtime_compatibility.reason
				if runtime_compatibility is not None
				else "The installed release profile is not recognized.",
			)

	play_button.configure(command=run_primary_action)
	update_button.configure(command=synchronize_game_files)
	repair_button.configure(command=lambda: synchronize_game_files(repair=True))
	doctor_button.configure(
		command=lambda: run_operation("Checking the system…", command_for("doctor"))
	)

	def apply_saved_settings(updated_settings: Settings) -> None:
		set_shared_telemetry_enabled(updated_settings.telemetry_enabled)
		saved_limit = (
			f"{updated_settings.download_speed_limit_mbps:g} MB/s"
			if updated_settings.download_speed_limit_mbps is not None
			else "unlimited"
		)
		append_log(
			f"Saved launcher settings to {paths.settings_file}: "
			f"runtime={updated_settings.runtime}, "
			f"proton_sync={updated_settings.proton_sync}, "
			f"download_limit={saved_limit}, "
			f"low_bandwidth={updated_settings.low_bandwidth_mode}, "
			f"telemetry={updated_settings.telemetry_enabled}"
		)
		status.set("Settings saved.")
		progress_text.set(
			"Game and download settings apply to the next operation; launcher scale "
			"and cached-content mode apply after restart."
		)
		if show_dashboard_debug:
			refresh_dashboard_debug_disk_state()
			update_dashboard_debug_view(force=True)

	def open_settings() -> None:
		nonlocal settings_window
		settings_window = open_settings_dialog(
			root,
			paths=paths,
			launcher_ui_scale=launcher_ui_scale,
			window_icon=window_icon,
			apply_window_icon=apply_window_icon,
			on_saved=apply_saved_settings,
			existing=settings_window,
		)

	settings_button.configure(command=open_settings)

	def choose_import_source() -> None:
		source = filedialog.askdirectory(
			title="Choose an existing PristonTale EU game directory",
			mustexist=True,
		)
		if not source:
			return
		run_operation(
			"Importing the existing game into the managed installation…",
			command_for("import-game", source),
			game_files_may_change=True,
		)

	import_button.configure(command=choose_import_source)
	log_toggle.configure(command=toggle_log)

	def close_dashboard() -> None:
		# Keep draining each client process while it owns a shared runtime lease.
		# Closing the window therefore minimizes the dashboard until all clients
		# and any active launcher operation have finished.
		if operation_active or game_clients.active_count:
			set_dashboard_debug(False)
			dashboard_chrome.minimize()
			return
		root.destroy()

	dashboard_chrome.set_close_command(close_dashboard)
	root.protocol("WM_DELETE_WINDOW", close_dashboard)

	def update_news_viewport(_event: object | None = None) -> None:
		news_canvas.configure(scrollregion=news_canvas.bbox("all"))

	def resize_news_content(event: object) -> None:
		width = getattr(event, "width", 0)
		if isinstance(width, int) and width > 0:
			news_canvas.itemconfigure(news_window, width=width)

	def apply_responsive_layout() -> None:
		nonlocal controls_are_stacked, responsive_layout_after
		responsive_layout_after = None
		width = max(1, root.winfo_width())
		stacked = dashboard_controls_stacked(width, launcher_ui_scale)
		if stacked != controls_are_stacked:
			controls_are_stacked = stacked
			if stacked:
				game_actions.grid_configure(
					row=0,
					column=0,
					columnspan=2,
					padx=0,
					pady=(0, 4),
				)
				system_actions.grid_configure(
					row=1,
					column=0,
					columnspan=2,
					padx=0,
					pady=(4, 0),
				)
			else:
				game_actions.grid_configure(
					row=0,
					column=0,
					columnspan=1,
					padx=(0, 4),
					pady=0,
				)
				system_actions.grid_configure(
					row=0,
					column=1,
					columnspan=1,
					padx=(4, 0),
					pady=0,
				)
		if news_card_columns(width, launcher_ui_scale) != news_layout_columns:
			layout_news_cards()

	def schedule_responsive_layout(event: object | None = None) -> None:
		nonlocal responsive_layout_after
		if event is not None and getattr(event, "widget", root) is not root:
			return
		if responsive_layout_after is not None:
			try:
				root.after_cancel(responsive_layout_after)
			except tk.TclError:
				pass
		responsive_layout_after = root.after_idle(apply_responsive_layout)

	def invoke_shortcut(button: ttk.Button) -> str:
		button.invoke()
		return "break"

	def scroll_news_keyboard(units: int) -> str:
		news_canvas.yview_scroll(units, "units")
		return "break"

	news_content_host.bind("<Configure>", update_news_viewport)
	news_content.bind("<Configure>", update_news_viewport)
	patches_content.bind("<Configure>", update_news_viewport)
	news_canvas.bind("<Configure>", resize_news_content)
	news_canvas.bind("<Button-1>", lambda _event: news_canvas.focus_set(), add="+")
	news_canvas.bind("<Up>", lambda _event: scroll_news_keyboard(-1))
	news_canvas.bind("<Down>", lambda _event: scroll_news_keyboard(1))
	news_canvas.bind("<Prior>", lambda _event: scroll_news_keyboard(-8))
	news_canvas.bind("<Next>", lambda _event: scroll_news_keyboard(8))
	news_canvas.bind("<Home>", lambda _event: news_canvas.yview_moveto(0.0))
	news_canvas.bind("<End>", lambda _event: news_canvas.yview_moveto(1.0))
	news_tab_button.bind(
		"<Right>",
		lambda _event: switch_news_tab_from_keyboard("patches", patches_tab_button),
	)
	patches_tab_button.bind(
		"<Left>",
		lambda _event: switch_news_tab_from_keyboard("news", news_tab_button),
	)
	root.bind("<Alt-p>", lambda _event: invoke_shortcut(play_button))
	root.bind("<Alt-u>", lambda _event: invoke_shortcut(update_button))
	root.bind("<Alt-r>", lambda _event: invoke_shortcut(repair_button))
	root.bind("<Alt-i>", lambda _event: invoke_shortcut(import_button))
	root.bind("<Alt-c>", lambda _event: invoke_shortcut(doctor_button))
	root.bind("<Alt-s>", lambda _event: invoke_shortcut(settings_button))
	root.bind("<Alt-l>", lambda _event: invoke_shortcut(launcher_update_button))
	root.bind("<Control-l>", lambda _event: invoke_shortcut(log_toggle))
	root.bind("<Configure>", schedule_responsive_layout, add="+")
	activity_window.bind("<Escape>", lambda _event: hide_activity_window())
	for scroll_widget in (
		news_canvas,
		news_content_host,
		news_content,
		patches_content,
	):
		scroll_widget.bind("<MouseWheel>", scroll_news_view, add="+")
		scroll_widget.bind("<Button-4>", scroll_news_view, add="+")
		scroll_widget.bind("<Button-5>", scroll_news_view, add="+")
	apply_responsive_layout()
	startup_overlay.lift()
	startup_status.set("Restoring dashboard content…")
	startup_overlay.update_idletasks()
	show_broadcast(read_cached_broadcast(paths.broadcast_cache))
	show_news(read_cached_news(paths.news_cache))
	show_patch_notes(read_cached_patch_notes(paths.patches_cache))
	cached_launcher_update = read_cached_launcher_update_check(
		paths.launcher_update_check_cache
	)
	if cached_launcher_update is not None:
		show_launcher_update_check(cached_launcher_update, log_reason=False)
	refresh_runtime_compatibility()
	mark_startup_component_ready(
		"cached_content",
		"Cached dashboard content ready",
	)
	poll_events()
	load_official_logo()
	update_startup_progress("Loading online dashboard content…")
	startup_overlay.update_idletasks()
	if not startup_transition_started:
		startup_timeout_after = root.after(
			DASHBOARD_PRELOADER_TIMEOUT_MILLISECONDS,
			timeout_startup_preloader,
		)
	maybe_start_dashboard_transition()
	try:
		root.mainloop()
	except KeyboardInterrupt:
		try:
			root.destroy()
		except tk.TclError:
			pass