Add HealthChat API service layer (#1)

* feat(healthchat): add HealthChat API service layer

New features/healthchat modules: typed Retrofit client with
per-request Matrix token auth, member directory, profile and
invite services, plus test fakes and fixtures.

* test(healthchat): use runCatchingExceptions

Detekt's RunCatchingNotAllowed rule forbids plain runCatching.

features/healthchat/test/build.gradle.kts

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2026 Novaloop AG
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+plugins {
+    id("io.element.android-compose-library")
+}
+
+android {
+    namespace = "io.element.android.features.healthchat.test"
+}
+
+dependencies {
+    api(projects.features.healthchat.api)
+    implementation(libs.coroutines.core)
+    implementation(projects.libraries.architecture)
+    implementation(projects.libraries.matrix.api)
+    implementation(projects.libraries.matrix.test)
+    implementation(projects.tests.testutils)
+}

features/healthchat/test/src/main/kotlin/io/element/android/features/healthchat/test/FakeHealthChatDirectoryService.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2026 Novaloop AG
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.healthchat.test
+
+import io.element.android.features.healthchat.api.HealthChatDirectoryService
+import io.element.android.features.healthchat.api.HealthChatMember
+import io.element.android.features.healthchat.api.HealthChatMemberDirectory
+import io.element.android.libraries.matrix.api.core.UserId
+import io.element.android.tests.testutils.lambda.lambdaError
+
+class FakeHealthChatDirectoryService(
+    private val searchMembersLambda: suspend (String) -> Result<HealthChatMemberDirectory> = { lambdaError() },
+    private val getMemberLambda: suspend (UserId) -> Result<HealthChatMember> = { lambdaError() },
+) : HealthChatDirectoryService {
+    override suspend fun searchMembers(query: String): Result<HealthChatMemberDirectory> {
+        return searchMembersLambda(query)
+    }
+
+    override suspend fun getMember(userId: UserId): Result<HealthChatMember> {
+        return getMemberLambda(userId)
+    }
+}

features/healthchat/test/src/main/kotlin/io/element/android/features/healthchat/test/FakeHealthChatInviteService.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2026 Novaloop AG
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.healthchat.test
+
+import io.element.android.features.healthchat.api.HealthChatInviteService
+import io.element.android.tests.testutils.lambda.lambdaError
+
+class FakeHealthChatInviteService(
+    private val inviteLambda: suspend (String, String) -> Result<String> = { _, _ -> lambdaError() },
+) : HealthChatInviteService {
+    override suspend fun invite(email: String, personalNote: String): Result<String> {
+        return inviteLambda(email, personalNote)
+    }
+}

features/healthchat/test/src/main/kotlin/io/element/android/features/healthchat/test/FakeHealthChatProfileRepository.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2026 Novaloop AG
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.healthchat.test
+
+import io.element.android.features.healthchat.api.HealthChatCompleteness
+import io.element.android.features.healthchat.api.HealthChatMember
+import io.element.android.features.healthchat.api.HealthChatProfileRepository
+import io.element.android.features.healthchat.api.HealthChatProfileUpdate
+import io.element.android.libraries.architecture.AsyncData
+import io.element.android.tests.testutils.lambda.lambdaError
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+
+class FakeHealthChatProfileRepository(
+    private val refreshOwnProfileLambda: suspend () -> Result<HealthChatMember> = { lambdaError() },
+    private val refreshCompletenessLambda: suspend () -> Result<HealthChatCompleteness> = { lambdaError() },
+    private val updateOwnProfileLambda: suspend (HealthChatProfileUpdate) -> Result<String> = { lambdaError() },
+    private val uploadAvatarLambda: suspend (String, String, ByteArray) -> Result<String> = { _, _, _ -> lambdaError() },
+    private val deleteAvatarLambda: suspend () -> Result<String> = { lambdaError() },
+) : HealthChatProfileRepository {
+    private val ownProfileFlow = MutableStateFlow<AsyncData<HealthChatMember>>(AsyncData.Uninitialized)
+    override val ownProfile: StateFlow<AsyncData<HealthChatMember>> = ownProfileFlow
+
+    private val completenessFlow = MutableStateFlow<AsyncData<HealthChatCompleteness>>(AsyncData.Uninitialized)
+    override val completeness: StateFlow<AsyncData<HealthChatCompleteness>> = completenessFlow
+
+    fun givenOwnProfile(value: AsyncData<HealthChatMember>) {
+        ownProfileFlow.value = value
+    }
+
+    fun givenCompleteness(value: AsyncData<HealthChatCompleteness>) {
+        completenessFlow.value = value
+    }
+
+    override suspend fun refreshOwnProfile(): Result<HealthChatMember> {
+        return refreshOwnProfileLambda()
+            .onSuccess { ownProfileFlow.value = AsyncData.Success(it) }
+            .onFailure { ownProfileFlow.value = AsyncData.Failure(it) }
+    }
+
+    override suspend fun refreshCompleteness(): Result<HealthChatCompleteness> {
+        return refreshCompletenessLambda()
+            .onSuccess { completenessFlow.value = AsyncData.Success(it) }
+            .onFailure { completenessFlow.value = AsyncData.Failure(it) }
+    }
+
+    override suspend fun updateOwnProfile(update: HealthChatProfileUpdate): Result<String> {
+        return updateOwnProfileLambda(update)
+    }
+
+    override suspend fun uploadAvatar(fileName: String, mimeType: String, data: ByteArray): Result<String> {
+        return uploadAvatarLambda(fileName, mimeType, data)
+    }
+
+    override suspend fun deleteAvatar(): Result<String> {
+        return deleteAvatarLambda()
+    }
+}

features/healthchat/test/src/main/kotlin/io/element/android/features/healthchat/test/HealthChatFixtures.kt

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2026 Novaloop AG
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.healthchat.test
+
+import io.element.android.features.healthchat.api.HealthChatCompleteness
+import io.element.android.features.healthchat.api.HealthChatMember
+import io.element.android.features.healthchat.api.HealthChatMemberDirectory
+import io.element.android.libraries.matrix.api.core.UserId
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toImmutableList
+
+fun aHealthChatMember(
+    userId: UserId = UserId("@erika.muster:healthchat.ch"),
+    displayName: String? = "Dr. med. Erika Muster",
+    avatarUrl: String? = null,
+    title: String? = "Dr. med.",
+    firstName: String? = "Erika",
+    lastName: String? = "Muster",
+    specialty: String? = "Allgemeinmedizin",
+    practiceName: String? = "Praxis Muster",
+    businessCity: String? = "Zürich",
+    furtherInfo: String? = null,
+    businessEmail: String? = "praxis@muster.ch",
+    businessTel: String? = "+41 44 123 45 67",
+    street: String? = "Musterstrasse",
+    houseNumber: String? = "12",
+    postalCode: String? = "8001",
+    website: String? = "https://praxis-muster.ch",
+    isApproved: Boolean = true,
+) = HealthChatMember(
+    userId = userId,
+    displayName = displayName,
+    avatarUrl = avatarUrl,
+    title = title,
+    firstName = firstName,
+    lastName = lastName,
+    specialty = specialty,
+    practiceName = practiceName,
+    businessCity = businessCity,
+    furtherInfo = furtherInfo,
+    businessEmail = businessEmail,
+    businessTel = businessTel,
+    street = street,
+    houseNumber = houseNumber,
+    postalCode = postalCode,
+    website = website,
+    isApproved = isApproved,
+)
+
+fun aHealthChatMemberDirectory(
+    members: List<HealthChatMember> = listOf(aHealthChatMember()),
+    totalCount: Int = members.size,
+    searchQuery: String = "",
+    isApproved: Boolean = true,
+    pendingMessage: String? = null,
+) = HealthChatMemberDirectory(
+    members = members.toImmutableList(),
+    totalCount = totalCount,
+    searchQuery = searchQuery,
+    isApproved = isApproved,
+    pendingMessage = pendingMessage,
+)
+
+fun aHealthChatCompleteness(
+    isComplete: Boolean = true,
+    missingFields: ImmutableList<String> = persistentListOf(),
+    message: String? = null,
+    hasProfilePhoto: Boolean = true,
+) = HealthChatCompleteness(
+    isComplete = isComplete,
+    missingFields = missingFields,
+    message = message,
+    hasProfilePhoto = hasProfilePhoto,
+)