[Enhancement] Project cards lack metadata, quick actions, and rename support

[Codewithpabitra]

Description

The project cards on the Home Screen are too minimal to be useful. Users
cannot tell anything meaningful about a project (size, shape of data, when
it was created) without opening it. There is also no way to rename a project
from the UI, and the delete button is an awkward floating icon that creates
accessibility issues (nested <button> inside <button>).

Current Behavior

• Cards show only: project name, optional description, last modified date
• No file size, row count, or column count visible at a glance
• No rename functionality anywhere in the UI or API
• Delete is a floating icon nested inside the card button (invalid HTML /
  accessibility violation)
• + New Project card gives no hint about what format to upload
• GET /projects/recent does not return dataset shape or upload metadata
• PATCH /projects/{project_id} endpoint does not exist

Expected Behavior

Project Cards

• Display metadata badges: rows, columns, file size, date created
• Show last modified date in the card footer
• Strong hover and focus styles for better interactivity affordance
• Single focusable card surface (no nested interactive elements)

Kebab Menu (⋮)

• Each card has a ⋮ menu with Rename and Delete
• Rename opens an InputDialog for editing the project name inline
• Delete reuses the existing ConfirmDialog with toast feedback

New Project Card

• Clearer dashed card with an upload icon and "Upload a CSV" label

API

• GET /projects/recent returns upload_date, file_size_bytes,
  row_count, column_count
• PATCH /projects/{project_id} accepts { "name": "..." } and
  returns the updated project
• PATCH added to CORS allowed methods

Tests

• Unit tests for CSV stats extraction
• Integration tests for rename and enriched recent projects response

Files Affected

Backend

• app/utils/pandas_helpers.py
• app/schemas.py
• app/services/project_service.py
• app/api/endpoints/projects.py
• app/main.py

Frontend

• src/components/HomeScreen.jsx
• src/api/projects.js
• src/api/index.js

Tests

• tests/test_new_features.py

[Codewithpabitra]

This has been addressed in PR #249 . Implemented metadata badges (rows, cols, file size, created date), kebab menu with rename/delete actions, and improved hover effects.