feat(chat): stabilize multi-image attachment picker (#986)

app/src/androidTest/java/com/m57/hermescontrol/ui/chat/components/AttachmentChipTest.kt

@@ -0,0 +1,46 @@
+package com.m57.hermescontrol.ui.chat.components
+
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.performClick
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.MediumTest
+import com.m57.hermescontrol.data.model.Attachment
+import org.junit.Assert.assertTrue
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+@MediumTest
+class AttachmentChipTest {
+    @get:Rule
+    val composeTestRule = createComposeRule()
+
+    @Test
+    fun imageThumbnailClick_opensPreviewWithoutRemovingAttachment() {
+        var previewed = false
+        var removed = false
+        val attachment =
+            Attachment(
+                uri = "content://image/preview",
+                name = "preview.jpg",
+                mimeType = "image/jpeg",
+                size = 123L,
+            )
+
+        composeTestRule.setContent {
+            AttachmentChip(
+                attachment = attachment,
+                onPreview = { previewed = true },
+                onRemove = { removed = true },
+            )
+        }
+
+        composeTestRule.onNodeWithTag("attachment_preview").performClick()
+        composeTestRule.runOnIdle {
+            assertTrue("image tap must open preview", previewed)
+            assertTrue("image tap must not remove attachment", !removed)
+        }
+    }
+}