feat: Kisani rebrand, step-based onboarding flow, dark mode fixes

- Rename app to Kisani in all UI text and Face ID prompt
- Replace flat 2-state RootView with 5-step flow: ConnectView →
  LoginView → FolderSetupView → PhotoPermissionView → MainTabView
- Remove NavigationStack from LoginView (was causing nested-stack crash);
  drive navigation via ConnectionStore.isSessionActive
- Add FolderSetupView and PhotoPermissionView onboarding screens with
  step indicator (2/3, 3/3), spring entrance animations, and UGreen
  connection chip
- Fix dark mode button invisibility: PrimaryButtonStyle and PillButtonStyle
  now use AppTheme.inkInverse; GhostButtonStyle border uses ink.opacity(0.25)
- Add AppTheme.inkInverse adaptive token (dark bg ink on dark, white on light)
- Add ConnectionStore.isSessionActive (non-persisted) and
  onboardingPhotoShown (UserDefaults-persisted)
- Add os_log logging in LoginViewModel at auth start/success/failure
- Remove dead Help button from ConnectView
- UGreenCompatibilityBadge, KeychainStore, SavedConnections, extensions,
  PrivacyInfo.xcprivacy, unit test target and test stubs
- AppTheme: full UIColor dynamic provider tokens for dark/light adaptive color
- AppearanceMode enum + segmented picker in SettingsView
- BackupView: enlarged ring, removed options card and linear progress bar
- HistoryView: duration and bytes formatting, improved typography hierarchy

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

project.yml

@@ -36,6 +36,8 @@ targets:
       - Shared
     resources:
       - Assets.xcassets
+      - path: App/PrivacyInfo.xcprivacy
+        buildPhase: resources
     info:
       path: App/Info.plist
       properties:
@@ -74,3 +76,17 @@ targets:
         product: SMBClient
       - package: Citadel
         product: Citadel
+
+  NASBackupTests:
+    type: bundle.unit-test
+    platform: iOS
+    sources:
+      - Tests
+    dependencies:
+      - target: NASBackup
+    settings:
+      base:
+        TEST_HOST: $(BUILT_PRODUCTS_DIR)/NASBackup.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/NASBackup
+        BUNDLE_LOADER: $(TEST_HOST)
+        SWIFT_VERSION: "5.9"
+        IPHONEOS_DEPLOYMENT_TARGET: "16.0"