fix(healthchat): refresh the account status whenever settings appears

The banner kept telling the user to complete a profile they had just
completed, and nothing was fetched until the screen was actually shown.

ElementX/Sources/AppHooks/HealthChat/HealthChatAccountStatusLoader.swift

@@ -9,27 +9,37 @@ import Foundation
 import Observation
 
 /// Loads the own account's status for the banners that advertise it.
+/// Nothing is fetched until ``load()`` is called, so the settings screen decides when.
 @Observable
 final class HealthChatAccountStatusLoader {
     private(set) var status: HealthChatAccountStatus = .unknown
     
-    /// The load kicked off on creation — await this in tests before asserting.
-    @ObservationIgnored private(set) var loadingTask: Task<Void, Never>?
+    @ObservationIgnored private let apiService: HealthChatAPIServiceProtocol?
+    
+    /// The load in flight — await this in tests before asserting.
+    @ObservationIgnored @CancellableTask private(set) var loadingTask: Task<Void, Never>?
     
     init(apiService: HealthChatAPIServiceProtocol) {
-        loadingTask = Task { await load(from: apiService) }
+        self.apiService = apiService
     }
     
     /// Creates a loader with a fixed status, for previews.
     init(status: HealthChatAccountStatus) {
         self.status = status
+        apiService = nil
+    }
+    
+    /// Fetches the status again, replacing a load still in flight.
+    func load() {
+        guard let apiService else { return }
+        loadingTask = Task { await load(from: apiService) }
     }
     
     // MARK: - Private
     
     private func load(from apiService: HealthChatAPIServiceProtocol) async {
-        // Every failure below leaves the status unknown: a banner must not report an error.
-        guard case let .success(profile) = await apiService.ownProfile() else {
+        // Every failure below leaves the status untouched: a banner must not report an error.
+        guard case let .success(profile) = await apiService.ownProfile(), !Task.isCancelled else {
             return
         }
         
@@ -38,7 +48,7 @@ final class HealthChatAccountStatusLoader {
             return
         }
         
-        guard case let .success(completeness) = await apiService.profileCompleteness() else {
+        guard case let .success(completeness) = await apiService.profileCompleteness(), !Task.isCancelled else {
             return
         }