Add onboarding UI tests and improve app data management

- Add Suite0_OnboardingTests with fresh install and login test flows
- Add accessibility identifiers to onboarding views for UI testing
- Remove deprecated DataCache in favor of unified DataManager
- Update API layer to support public upgrade-triggers endpoint
- Improve onboarding first task view with better date handling
- Update various views with accessibility identifiers for testing
- Fix subscription feature comparison view layout
- Update document detail view improvements

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

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

iosApp/CaseraUITests/Suite3_ResidenceTests.swift

@@ -172,10 +172,6 @@ final class Suite3_ResidenceTests: XCTestCase {
             sleep(1)
         }
 
-        // Scroll down to see more fields
-        app.swipeUp()
-        sleep(1)
-
         // Fill address fields - MUST exist for residence
         let streetField = app.textFields.containing(NSPredicate(format: "placeholderValue CONTAINS[c] 'Street'")).firstMatch
         XCTAssertTrue(streetField.exists, "Street field should exist in residence form")
@@ -192,11 +188,15 @@ final class Suite3_ResidenceTests: XCTestCase {
         stateField.tap()
         stateField.typeText("TS")
 
-        let postalField = app.textFields.containing(NSPredicate(format: "placeholderValue CONTAINS[c] 'Postal' OR placeholderValue CONTAINS[c] 'Zip'")).firstMatch
+        let postalField = app.textFields.containing(NSPredicate(format: "placeholderValue CONTAINS[c] 'Postal' OR placeholderValue CONTAINS[c] 'Postal'")).firstMatch
         XCTAssertTrue(postalField.exists, "Postal code field should exist in residence form")
         postalField.tap()
         postalField.typeText("12345")
 
+        // Scroll down to see more fields
+        app.swipeUp()
+        sleep(1)
+        
         // Save
         let saveButton = app.buttons.containing(NSPredicate(format: "label CONTAINS[c] 'Save'")).firstMatch
         XCTAssertTrue(saveButton.exists, "Save button should exist")