feat(DISPLAY-002): GLD mode shows real share prices

docs/roadmap/in-progress/DISPLAY-002-gld-mode-no-conversion.yaml

@@ -1,6 +1,6 @@
 id: DISPLAY-002
 title: GLD Mode Shows Real GLD Pricing
-status: backlog
+status: done
 priority: P0
 size: S
 depends_on:
@@ -15,13 +15,14 @@ acceptance_criteria:
   - LTV calculated using GLD position value as collateral
   - Options strike selection in GLD mode uses GLD share prices directly
   - Hedge cost shown as $/share or $/position, not $/oz
-notes:
-  - This is the key insight: GLD mode should NOT convert to gold
-  - User bought shares, they think in shares, they should see share metrics
-  - GLD backing decay is irrelevant in GLD mode (baked into price)
-  - Only when switching to XAU mode is conversion needed
-implementation_hints:
-  - GLD mode short-circuits conversion logic
-  - Overview in GLD mode: position value = shares × GLD_price
-  - Hedge in GLD mode: strike = GLD_share_price × strike_pct
-  - Add `position.is_gld()` helper to check display treatment
+implementation_notes:
+  - Added `display_mode` field to PortfolioConfig (default: "XAU")
+  - Created app/domain/conversions.py for display mode conversion utilities
+  - Updated portfolio_math.py to respect display_mode in spot resolution and snapshots
+  - Updated overview.py to show share prices/units in GLD mode
+  - Updated hedge.py to show share prices/units in GLD mode
+  - Updated settings.py to allow display mode selection
+  - Added tests/test_display_mode.py with comprehensive test coverage
+  - Default display mode remains "XAU" to preserve existing behavior
+  - GLD mode short-circuits conversion logic, showing share prices directly
+completed: 2026-03-28