This commit introduces a series of significant enhancements to the ML Log Analyzer application, based on the approved roadmap.

The key improvements are:

1.  **State Management Refactoring:** The entire application's state management has been refactored from component-local `useState` to a centralized Zustand store. This eliminates prop drilling, improves maintainability, and provides a clear data flow architecture.

2.  **Performance with Web Workers:** All file reading and parsing operations have been moved off the main thread. This ensures the UI remains smooth and responsive, even when loading and processing large log files.

3.  **Session Persistence:** The application state is now automatically persisted to your browser's `localStorage`. When you return to the application, your previous session, including uploaded files and settings, is restored.

4.  **Charting Enhancements:**
    *   **Data Smoothing:** A moving average smoothing option has been added to the charts to help visualize noisy data more clearly.
    *   **Custom Colors:** You can now select custom colors for each file's line on the charts via a color picker in the file list.

5.  **Sharing Functionality:** A "Share" feature has been implemented. It compresses the entire application state into a URL-safe string and copies a shareable link to the clipboard. Opening this link restores the exact session, allowing for easy collaboration and sharing of analyses.

All new functionality is covered by unit tests, and all existing tests were updated to support the new architecture, ensuring the stability and correctness of the application.

This commit introduces a series of significant enhancements to the ML Log Analyzer application, based on the approved roadmap.

The key improvements are:

1.  **State Management Refactoring:** The entire application's state management has been refactored from component-local `useState` to a centralized Zustand store. This eliminates prop drilling, improves maintainability, and provides a clear data flow architecture.

2.  **Performance with Web Workers:** All file reading and parsing operations have been moved off the main thread. This ensures the UI remains smooth and responsive, even when loading and processing large log files.

3.  **Session Persistence:** The application state is now automatically persisted to your browser's `localStorage`. When you return to the application, your previous session, including uploaded files and settings, is restored.

4.  **Charting Enhancements:**
    *   **Data Smoothing:** A moving average smoothing option has been added to the charts to help visualize noisy data more clearly.
    *   **Custom Colors:** You can now select custom colors for each file's line on the charts via a color picker in the file list.

5.  **Sharing Functionality:** A "Share" feature has been implemented. It compresses the entire application state into a URL-safe string and copies a shareable link to the clipboard. Opening this link restores the exact session, allowing for easy collaboration and sharing of analyses.

**FIX:** This commit also resolves a critical runtime bug where the `lz-string` library failed to import correctly in Vite's development server. The fix involves explicitly including `lz-string` in Vite's `optimizeDeps` configuration to ensure it is properly pre-bundled.

All new functionality is covered by unit tests, and all existing tests were updated to support the new architecture, ensuring the stability and correctness of the application.