🧹 refactor: Extract ProgressBar component in ArchiveView.jsx

[BTawaifi]

🎯 What: Extracted the duplicated progress bar markup for metrics (Focus Depth, Session Value, Mental Energy) into a single, reusable ProgressBar functional component in src/components/ArchiveView.jsx.
💡 Why: This improves maintainability and readability by reducing boilerplate and centralizing the style and markup logic for metric bars.
✅ Verification: Verified that npm run build succeeds, indicating no syntax errors or unresolved variables. Visually verified the change using a headless Playwright script to load the Archive view. Verified the logic handles Tailwind classes (accent-bg, bg-blue-400, bg-yellow-400) appropriately.
✨ Result: The ArchiveView.jsx codebase is now cleaner, easier to read, and more easily modifiable if the metric visualization style ever changes.

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PR created automatically by Jules for task 16149653756370757688 started by @BTawaifi

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