feat(budget): add month-over-month comparison to summary cards

Each summary card (Einnahmen, Ausgaben, Saldo) now shows a trend line
comparing the current month to the previous one. The previous month's
summary is fetched in parallel via the existing /budget/summary endpoint,
so there is no extra round-trip latency. Positive deltas render in green
(▲), negative in red (▼), unchanged in neutral grey (—).

Closes BL-02.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Ulas
2026-03-30 22:54:04 +02:00
parent ca377e8441
commit 26d3d12a22
4 changed files with 55 additions and 12 deletions
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@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
### Added
- Budget: month-over-month comparison in summary cards — each card (Einnahmen, Ausgaben, Saldo) shows a trend line (▲/▼ + delta amount vs. previous month); previous month summary is fetched in parallel with current month
## [0.2.1] - 2026-03-30
### Fixed