Base fixes and test harness

CHANGELOG.md

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+# Changelog
+
+All notable changes to Portfolio Journal will be documented in this file.
+
+## [Unreleased]
+
+### Fixed
+- **Snapshot View**: Currency and number formatting now respects device locale settings with fallback for mixed locale input
+- **Goal Share Button**: Share button in Goals view now works correctly (was being intercepted by row tap gesture)
+- **Widget Currency**: Widget now displays correct currency symbol from app settings instead of defaulting to EUR
+- **Goal Editor**: Currency symbol prefix now displays correctly and number parsing is locale-aware
+
+### Enhanced
+- **Goal Sharing**:
+  - Added privacy mode option to hide current value when sharing
+  - Share card now displays app icon (BrandMark)
+  - Share card now shows target date when set
+  - Share card now shows estimated completion date when available
+  - Fallback text sharing includes App Store link
+  - Dynamic card height based on content