feat: Implement PySide6 desktop application UI

[Juqika]

I've created a new desktop application using Python and PySide6, replicating the UI layout and style specified in the issue.

Key features I implemented:

• Dark-themed interface with rounded corners and clearly separated sections.
• Top section: Input buttons (GitHub, Folder, Copy), repository/path input field, and "Pack" button.
• Middle section: Output format toggles (XML, Markdown, Plain) and Include/Ignore pattern input fields.
• Right panel: Checkbox options for "Output Format Options" and "File Processing Options".
• UI built with layouts for responsiveness.
• Placeholder logic for the "Pack" button.
• Basic styling applied via QPalette and stylesheets to match the design.

The main application code is located in desktop_app/src/main_window.py.

Checklist

• Run npm run test
• Run npm run lint

[gemini-code-assist]

Hello @Juqika, 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!

Summary of Changes

Hello! Gemini here, providing a summary of this pull request. This PR introduces the initial implementation of the desktop application's main window user interface using PySide6. It sets up the core layout, adds the necessary input fields, buttons, radio buttons, and checkboxes as described in the issue, and applies a dark theme and basic styling to match the design specifications. The main logic for the 'Pack' button is currently a placeholder.

Highlights

• Initial PySide6 UI: Implements the main window for the desktop application using PySide6, establishing the foundational GUI structure.
• Layout and Structure: Organizes the UI into distinct sections: a top area for repository input, a middle area for output configuration and pattern filtering, and a right panel for various options, using PySide6 layouts for responsiveness.
• Core Components: Adds key interactive elements including GitHub, Folder, and Copy buttons, a path input field, output format radio buttons (XML, Markdown, Plain), include/ignore pattern input fields, and various option checkboxes (File summary, Directory structure, Line numbers, Parsable format, Compress code, Remove comments, Remove empty lines).
• Styling and Theme: Applies a dark theme using QPalette and custom stylesheets to give the application a distinct visual appearance with rounded corners and separated sections as specified.
• Placeholder Logic: Includes a basic connected slot for the "Pack" button (on_pack_button_clicked) which currently only prints a message, indicating where the main processing logic will be integrated later.

Changelog

• desktop_app/src/main_window.py
  • Adds the complete MainWindow class definition, setting up the main application window.
  • Initializes the window title, geometry, and applies a dark theme and font.
  • Creates the main vertical layout and the central widget.
  • Implements the "Repository Input" group box with buttons (GitHub, Folder, Copy), a path input field, and the "Pack" button.
  • Implements the "Output Configuration" group box with output format radio buttons and include/ignore pattern input fields.
  • Implements the "Options" group box with sub-groups for "Output Format Options" and "File Processing Options", containing various checkboxes.
  • Connects the "Pack" button's clicked signal to a placeholder method.
  • Includes methods apply_stylesheet and apply_dark_theme to handle the visual styling.
  • Adds the standard if __name__ == "__main__": block to run the application.

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---

Widgets placed with care,
Dark theme gives a modern look,
Pack button awaits.

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[gemini-code-assist]

Code Review

This pull request introduces a new PySide6-based desktop application UI for "RepoPacker", which is a great step forward! The UI structure generally aligns with the described features, including the dark theme, input sections, and options panels.

The code is a solid first implementation. My review focuses on enhancing maintainability, cross-platform compatibility, and UI responsiveness, primarily by suggesting ways to organize the code better and leverage Qt's features more dynamically.

I'm following general Python (PEP 8) and Qt/PySide best practices in this review, as no specific style guide was provided.

Summary of Findings

• Maintainability: Long __init__ method: The MainWindow.__init__ method is quite long (lines 23-157), handling all UI setup. Refactoring it into smaller, private helper methods (e.g., _create_top_section, _create_middle_section) would improve readability and make the code easier to maintain.
• Cross-Platform Compatibility: Hardcoded Font: The application font is set to QFont("Segoe UI", 9) (line 30). This font may not be available on all operating systems. Using a generic font family (e.g., "SansSerif") or the system's default application font would improve portability.
• UI Responsiveness: Fixed Widget Sizes: The UI uses setFixedWidth() and setMinimumWidth() in several places (e.g., lines 41, 58, 74, 119). This can limit responsiveness. Relying more on Qt's layout system, size policies, and stretch factors could lead to a more adaptive UI.
• Maintainability: Embedded Stylesheet: The QSS stylesheet is embedded as a multi-line string (lines 164-220). Moving this to an external .qss file would make it easier to manage, edit (with syntax highlighting), and maintain, especially as styles become more complex.
• Code Cleanliness: Commented-out Code: There are several lines of commented-out code (e.g., line 75, 150, 154). These should be removed if they are no longer needed to keep the codebase clean. (Severity: low, not commented directly due to review settings).
• Code Cleanliness: Extraneous Empty Line: An unnecessary empty line exists at line 65. (Severity: low, not commented directly due to review settings).

Merge Readiness

The pull request lays a good foundation for the desktop application's UI. However, there are several medium severity issues related to maintainability, cross-platform font compatibility, and UI responsiveness that I've highlighted in the review comments.

Addressing these points would significantly improve the long-term quality and adaptability of the codebase. Therefore, I recommend that these changes be considered before merging. As a reviewer, I am not authorized to approve the pull request; please ensure further review and approval from other team members after addressing the feedback.

[gemini-code-assist]

The __init__ method (lines 23-157) is quite comprehensive, handling the setup for all UI components. For improved readability and maintainability, especially as the application complexity grows, have you considered breaking down the UI construction into smaller, private helper methods?

For example, you could introduce methods like:

• _setup_top_section()
• _setup_middle_section()
• _setup_right_panel()

This would make the __init__ method serve as a higher-level overview of the window's structure, delegating detailed widget creation and layout to these specialized methods. What are your thoughts on this kind of refactoring?

[gemini-code-assist]

The application font is currently hardcoded to QFont("Segoe UI", 9). While "Segoe UI" is common on Windows, it might not be available on other platforms like macOS or Linux, potentially leading to an inconsistent look or fallback to an unexpected font.

To enhance cross-platform compatibility, would you consider:

1. Using a more generic font family (e.g., "SansSerif")?
2. Querying the system's default application font and adjusting its size?

This could help ensure a more predictable appearance across different environments. For instance, QFont("SansSerif", 9) could be a more portable choice.

Suggested change

	QApplication.setFont(QFont("Segoe UI", 9)) # Example font
	QApplication.setFont(QFont("SansSerif", 9)) # Using a generic font family for better cross-platform compatibility

[gemini-code-assist]

I've noticed several instances of setFixedWidth() (e.g., lines 41, 45, 49, 58) and other fixed/minimum size settings (e.g., line 74 for middle_section_group_box, line 119 for right_panel_group_box).

While these help define the layout, relying heavily on fixed sizes can sometimes limit the UI's responsiveness to window resizing, different screen DPIs, or font size changes. The PR description mentions that the "UI built with layouts for responsiveness."

Could we explore leveraging Qt's layout system and size policies more extensively to achieve a more adaptive UI? For example, allowing buttons to use their sizeHint() combined with appropriate QSizePolicy settings (e.g., QSizePolicy.MinimumExpanding, QSizePolicy.Preferred) and stretch factors in layouts might provide more flexibility. What are your thoughts on this approach to further enhance responsiveness?

[gemini-code-assist]

The stylesheet is currently embedded as a large multi-line string within the apply_stylesheet method. As styling requirements evolve or become more complex, managing it directly in Python code can become cumbersome.

Would you consider moving this stylesheet to a separate .qss file (e.g., main_window_style.qss)? This approach offers several benefits:

• Improved Maintainability: Easier to edit and manage styles separately from logic.
• Syntax Highlighting: IDEs can provide syntax highlighting and validation for .qss files.
• Separation of Concerns: Keeps presentation details distinct from the application code.

You could then load it like this:

# In apply_stylesheet method:
# import os
# current_dir = os.path.dirname(os.path.abspath(__file__))
# qss_file = os.path.join(current_dir, "main_window_style.qss")
# try:
#     with open(qss_file, "r") as f:
#         stylesheet = f.read()
#     self.setStyleSheet(stylesheet)
# except FileNotFoundError:
#     print(f"Warning: Stylesheet file not found at {qss_file}")
#     # Fallback or error handling

What do you think about externalizing the stylesheet?