## Summary
- Add four view modes for net worth and account balance charts:
- **Stacked Accounts**: existing stacked bar chart showing balances by
account
- **Line**: net worth line chart with linear/log scale toggle
- **Change**: bar chart showing MoM%, YoY%, Rolling 12M changes
- **Waterfall**: bridge chart showing Start -> Change -> End transition
- Add Vitest for frontend unit testing with 52 tests covering all
calculation functions
- Proper sign handling for liabilities (credit cards and loans subtract
from net worth)
- Log scale disabled with warning when net worth includes zero or
negative values
- Shared components and logic between dashboard and account detail
charts
## New Files
- `vitest.config.ts` - Vitest configuration
- `resources/js/lib/chart-calculations.ts` - Pure computation functions
- `resources/js/lib/chart-calculations.test.ts` - 52 unit tests
- `resources/js/hooks/use-chart-views.ts` - Shared chart view state hook
- `resources/js/components/charts/` - Reusable chart components
## Test plan
- [x] Dashboard net worth chart shows view toggle and all four views
work
- [ ] Account detail page chart shows view toggle and three views work
(no stacked)
- [x] Line chart scale toggle works (log disabled with warning when
applicable)
- [x] Change chart series toggle (MoM, YoY, 12M EUR, 12M %) works
- [x] Waterfall chart month selector works
- [x] All 52 unit tests pass (`bun run test`)
- [x] Build succeeds (`bun run build`)
- [x] Dark mode styling correct
## Summary
- When a transaction ID is provided during sync, check if it already
exists before creating
- If it exists, return the existing transaction with 200 status instead
of failing with duplicate key error
- Prevents duplicate transactions when sync retries occur due to network
issues
## Test plan
- [x] Attempt to create a transaction with a specific ID
- [x] Attempt to create another transaction with the same ID
- [x] Verify the second request returns the existing transaction instead
of an error
## Summary
Add a labeling system for transactions that differs from categories in
that labels are ephemeral and created on-the-fly when assigned (no
pre-creation required). A transaction can have multiple labels
(many-to-many relationship), and labels can be used for filtering in the
transaction table and as actions in automation rules.
<img width="1372" height="484" alt="image"
src="https://github.com/user-attachments/assets/fd342b11-dafb-44ed-b818-578e1ea856e6"
/>
<img width="1373" height="613" alt="image"
src="https://github.com/user-attachments/assets/aa5cfb8b-50b7-4101-a872-54904924f234"
/>
<img width="1035" height="594" alt="image"
src="https://github.com/user-attachments/assets/ffa946b2-b01f-496b-8cb8-ab55ab5b79ed"
/>
## Changes
### Backend (Laravel)
- Add `labels` table with user_id, name, color, and soft deletes
- Add `label_transaction` pivot table for transaction-label many-to-many
- Add `automation_rule_labels` pivot table for automation rule-label
many-to-many
- Create Label model with relationships to User, Transaction, and
AutomationRule
- Add LabelController for CRUD operations (returns JSON for on-the-fly
creation)
- Add LabelSyncController for frontend sync
- Add LabelPolicy for authorization
- Update TransactionController to handle bulk label updates
- Update AutomationRuleController to handle label actions
- Add validation for label_ids in transactions and automation rules
### Frontend (React/TypeScript)
- Add Label type and color utilities
- Add labels table to IndexedDB (Dexie version 6)
- Create label-sync service with findOrCreate functionality
- Create LabelCombobox component with multi-select and create-on-type
- Add labels column to transactions table
- Add labels filter to transaction filters
- Add bulk label assignment in bulk actions bar
- Add labels action in create automation rule dialog
- Update rule engine to include labels in evaluation results
## Testing
- 11 feature tests for label CRUD
- 3 tests for label sync
- All 241 feature tests pass
## Screenshots
N/A - UI changes can be reviewed in browser
This commit message follows the specified format and provides a concise description of the changes made in the code diff. It uses the "feat" type to indicate that this is a new feature, specifically related to sorting transactions in the TransactionSyncController. The message is under 72 characters as required.