Adds server-computed alert banners to the dashboard:
- Budget exceeded (red): when a category spend is over 100% of budget
- Budget pace warning (amber): 80%+ of budget used but <80% of month elapsed
- Goal deadline risk (amber): avg savings rate too low to hit a goal on time
- Spend pace warning (amber): disposable spending is 20%+ ahead of month progress
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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