feat: Implement major improvements and new features

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.

Author: google-labs-jules[bot]

vite.config.js

@@ -8,6 +8,9 @@ export default defineConfig({
   // Use a relative base path for GitHub Pages.
   // Switch to absolute path when deploying on Vercel.
   base: process.env.VERCEL ? '/' : './',
+  optimizeDeps: {
+    include: ['lz-string'],
+  },
   plugins: [react()],
   build: {
     outDir: 'dist',