Fix residence auto-update, widget theming, and document patterns

- Fix residence detail not updating after edit:
  - DataManager.updateResidence() now updates both _residences and _myResidences
  - ResidenceViewModel auto-updates selectedResidence when data changes
  - No pull-to-refresh needed after editing

- Add widget theme support:
  - Widgets now use user's selected theme via App Group UserDefaults
  - ThemeManager has simplified version for widget extension context
  - Added WIDGET_EXTENSION compiler flag to CaseraExtension target

- Redesign widget views with organic aesthetic:
  - Updated FreeWidgetView, SmallWidgetView, MediumWidgetView, LargeWidgetView
  - Created OrganicTaskRowView, OrganicStatsView, OrganicStatPillWidget

- Document patterns in CLAUDE.md:
  - Added Mutation & Auto-Update Pattern section
  - Added iOS Shared Components documentation
  - Documented reusable buttons, forms, empty states, cards, modifiers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

iosApp/iosApp.xcodeproj/project.pbxproj

@@ -135,6 +135,9 @@
 			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
 			membershipExceptions = (
 				Assets.xcassets,
+				Design/DesignSystem.swift,
+				Design/OrganicDesign.swift,
+				Helpers/ThemeManager.swift,
 				Shared/TaskStatsCalculator.swift,
 			);
 			target = 1C07893C2EBC218B00392B46 /* CaseraExtension */;
@@ -713,6 +716,7 @@
 					"@executable_path/../../Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
+				OTHER_SWIFT_FLAGS = "-DWIDGET_EXTENSION";
 				PRODUCT_BUNDLE_IDENTIFIER = com.tt.casera.CaseraDev.CaseraDev;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
@@ -747,6 +751,7 @@
 					"@executable_path/../../Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
+				OTHER_SWIFT_FLAGS = "-DWIDGET_EXTENSION";
 				PRODUCT_BUNDLE_IDENTIFIER = com.tt.casera.CaseraDev.CaseraDev;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;