Remove unused test files: `simple_test.py` and `test_custom_control.py` to clean up the codebase.

Fix ASCII encoding crash in packaged app; add bundle smoke test

Add migration and tax data directories to packaging script

Bump version: 2.0.0a1 → 2.1.0a1

Merge pull request #245 from tuttle-dev/tax

Add stub for ContractIntent in tests to facilitate database-independent testing

Add comprehensive tests for KPI and monthly breakdown calculations

Add loading spinner to DashboardView for improved user experience

Add monthly spendable income breakdown feature and integrate with dashboard

Refactor spacing and dimensions across UI components for improved layout consistency

Implement operating country and currency features for user and tax calculations

Add tax data for Germany, Spain, and Sweden for 2024-2026; implement tax reserve calculations

Merge pull request #244 from tuttle-dev/forecast

feat: Enhance dashboard labels with year formatting; add new invoice creation options

feat: Add dashboard view for freelance business insights