[UI/UX] Build the "Saved Bookmarks" Dashboard

[centiceron]

Objective:

We recently merged awesome backend logic for saving bookmarks (PR #118, engine/bookmark_manager.py), but users have no way to actually view them in the app! We need a dedicated frontend interface to surface this data.

Note: This description is a rough outline pointing the issue, in case you're assigned please implement a more optimal approach that priortizes speed and storage.

Action Items:

• Create a new page component: app/pages/bookmarks_view.py (and add it to the sidebar navigation).

• Read data from the local bookmarks.json file.

• Render the bookmarks in a clean Streamlit UI (e.g., using st.expander or cards).

• Add UI buttons for users to "Edit Note" or "Delete" specific bookmarks, wiring them to the existing backend functions.

[github-actions]

Thank you for raising this issue!

We'll review it as soon as possible. We truly appreciate your contributions! ✨

Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊