Add LoadingView, improve initialization logic, and refine UI and localization elements

[Ziedelth]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @Ziedelth, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the user experience during application startup by introducing a dedicated loading screen and refactoring the core initialization process. It also includes various UI refinements across different components and updates to localization strings, ensuring a more polished and intuitive interface.

Highlights

• New Loading View: Introduced a dedicated LoadingView component to provide visual feedback during the application's initial setup and login process.
• Enhanced Initialization Logic: Refactored the application's startup sequence, moving asynchronous initialization tasks into a stateful widget to manage loading states more effectively and display the new loading view.
• UI/UX Improvements: Made several user interface adjustments, including refining the platform preference dialog layout, updating icons, and simplifying localization descriptions for clarity.
• Conditional Long Press: Implemented logic to disable the long-press action on calendar anime entries if the anime has not yet been released.
• Localization Updates: Added a new localization string for the 'Logging in...' message and streamlined existing descriptions for platform preferences.

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[gemini-code-assist]

Code Review

This pull request introduces a LoadingView for a better startup experience by refactoring the initialization logic into a stateful widget. It also includes various UI tweaks, such as icon changes and layout adjustments, and updates to localization strings.

My review highlights two potential issues:

1. In the platform preference dialog, the 'Remember my choice' text could cause a UI overflow with longer translations because it's not wrapped in an Expanded widget.
2. In the anime details view, the maxWidth for a TextPainter doesn't account for horizontal padding, which could lead to incorrect text truncation logic.

I've provided code suggestions to address these points. The rest of the changes look good and improve the application's UI and startup sequence.

[gemini-code-assist]

The maxWidth for the TextPainter should account for the horizontal padding of the parent container. The text is rendered within a Padding with symmetric(horizontal: 8), so the available width is MediaQuery.sizeOf(context).width - 16. Using the full screen width might lead to an incorrect calculation of didExceedMaxLines, potentially hiding the '...more' button when the text actually overflows.

Suggested change

	)..layout(maxWidth: MediaQuery.sizeOf(context).width);
	)..layout(maxWidth: MediaQuery.sizeOf(context).width - 16);

[gemini-code-assist]

The Text widget for 'Remember my choice' is no longer wrapped in an Expanded widget. This could cause a UI overflow if the localized text is long. It's better to wrap it in Expanded to ensure it takes up the available space and wraps if necessary.

Also, using a Row here is more idiomatic than Flex with a horizontal direction when no other Flex-specific properties are used.

Suggested change

	child: Flex(
	direction: Axis.horizontal,
	children: <Widget>[
	Checkbox(
	value: _remember,
	onChanged: (final bool? value) =>
	setState(() => _remember = value ?? false),
	),
	const SizedBox(width: 8),
	Text(l10n.rememberMyChoice),
	],
	),
	child: Row(
	children: <Widget>[
	Checkbox(
	value: _remember,
	onChanged: (final bool? value) =>
	setState(() => _remember = value ?? false),
	),
	const SizedBox(width: 8),
	Expanded(
	child: Text(l10n.rememberMyChoice),
	),
	],
	),