- Remove async refresh_workspace_seeded_units from date change handlers
- Date changes now only call on_form_change() (updates cost estimates, marks results stale)
- Entry spot is derived only when user clicks Run button
- Form remains responsive during configuration
- No more API errors when changing dates while configuring other fields
- Move option contracts from daily results table to overview cards (constant throughout backtest)
- Fix default dates to March 2026 (2026-03-02 to 2026-03-25)
- Add BT-004 backlog item: candlestick chart with portfolio value line on secondary axis
- Add BT-005 backlog item: defer entry spot derivation to backtest run (not on every date change)
- Fix return type annotation for get_default_premium_for_product
- Add type narrowing for Weight|Money union using _as_money helper
- Add isinstance checks before float() calls for object types
- Add type guard for Decimal.exponent comparison
- Use _unit_typed and _currency_typed properties for type narrowing
- Cast option_type to OptionType Literal after validation
- Fix provider type hierarchy in backtesting services
- Add types-requests to dev dependencies
- Remove '|| true' from CI type-check job
All 36 mypy errors resolved across 15 files.
- Remove '|| true' from CI type-check job to enforce strict checking
- Begin type narrowing pattern in units.py with _typed property accessors
- Document all 42 type errors across 15 files in roadmap backlog
- Priority: medium, estimated 4-6 hours to complete
Type errors fall into categories:
- Union types not narrowed after __post_init__ coercion
- float() on object types
- Duplicate method definitions
- Provider interface type mismatches
