fix(contact-card): remove cache prefix from VCard filename

Ui/Compose/ContactCard/build.gradle.kts

@@ -35,4 +35,6 @@ dependencies {
     implementation(core.androidx.lifecycle.viewmodel.compose)
     implementation(core.androidx.lifecycle.runtime.compose)
     implementation(core.qrose)
+
+    testImplementation(kotlin("test-junit"))
 }

Ui/Compose/ContactCard/src/main/kotlin/com/infomaniak/core/ui/compose/contactcard/ContactCardShareExt.kt

@@ -31,17 +31,18 @@ private const val MAX_AVATAR_SIZE = 5 * 1024 * 1024 // 5 MB
 private val ILLEGAL_FILE_NAME_CHARACTERS = Regex("[\\\\/:*?\"<>|]+")
 
 suspend fun Card.createShareFile(context: Context, avatarData: Pair<String?, String?>): File = withContext(Dispatchers.IO) {
-    val fileName = "attachments_cache${firstName}_${lastName}.vcf"
-    val safeFileName = fileName.replace(ILLEGAL_FILE_NAME_CHARACTERS, "")
-
     val directory = File(context.cacheDir, "attachments_cache").apply { mkdirs() }
 
-    File(directory, safeFileName).apply {
+    File(directory, createVCardFileName(firstName, lastName)).apply {
         val vCardContent = makeVCardString(avatarBase64 = avatarData.first, avatarMimeType = avatarData.second)
         writeText(vCardContent)
     }
 }
 
+internal fun createVCardFileName(firstName: String, lastName: String): String {
+    return "${firstName}_${lastName}.vcf".replace(ILLEGAL_FILE_NAME_CHARACTERS, "")
+}
+
 suspend fun Card.getAvatarDataOrNull(): Pair<String?, String?> {
     val url = avatarUrl ?: return null to null
 

Ui/Compose/ContactCard/src/test/kotlin/com/infomaniak/core/ui/compose/contactcard/ContactCardShareExtTest.kt

@@ -0,0 +1,34 @@
+/*
+ * Infomaniak Core - Android
+ * Copyright (C) 2026 Infomaniak Network SA
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.infomaniak.core.ui.compose.contactcard
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class ContactCardShareExtTest {
+
+    @Test
+    fun `VCard file name does not include cache directory name`() {
+        assertEquals("John_Doe.vcf", createVCardFileName(firstName = "John", lastName = "Doe"))
+    }
+
+    @Test
+    fun `VCard file name removes illegal characters`() {
+        assertEquals("John_Doe.vcf", createVCardFileName(firstName = "Jo/hn", lastName = "D:oe"))
+    }
+}