[GNC] Cashdera analytics companion for GnuCash

[Cashdera]

Hello,

I built a Windows desktop beta called Cashdera as an independent
analytics companion for GnuCash.

It opens an existing .gnucash file, imports it into a local SQLite
cache, and shows analytics such as:

- monthly cashflow
- category trends
- Sankey money flow
- transaction search
- budget vs actual
- net worth timeline
- year-over-year comparison
- CSV/PDF report export

The goal is not to replace GnuCash. It is a read-only analytics layer
on top of an existing GnuCash book. The source GnuCash file is not
modified.

Privacy/safety notes:

- local desktop app
- no account
- no cloud upload
- no telemetry
- independent project, not affiliated with GnuCash
- Windows-only beta
- unsigned installer, with SHA256 checksums in the GitHub release
- please test on a backup/copy first

GitHub public beta release:
https://github.com/proars/Cashdera/releases/tag/v0.1.0

Screenshots:
https://github.com/proars/Cashdera/blob/main/README.md#what-cashdera-gives-you

I would appreciate feedback from experienced GnuCash users, especially:

1. import issues with real books
2. calculation mismatches compared with GnuCash reports
3. reports/workflows that are missing

Thank you,

Ars