feat: attachment picker menu — camera, gallery, and file options

Replaced the generic file picker with a dropdown menu offering three
options: take photo (camera preview), pick from gallery (image/*), or
choose any file (*/*). Camera captures are compressed as JPEG and
uploaded like any other file. Upload logic extracted into shared
uploadPickedFile helper.

app/src/main/java/dev/kaizen/app/chat/ChatScreen.kt

@@ -72,10 +72,17 @@ import dev.kaizen.app.settings.SettingsScreen
 import dev.kaizen.app.settings.SettingsViewModel
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.material.icons.rounded.CameraAlt
+import androidx.compose.material.icons.rounded.Image
+import androidx.compose.material.icons.automirrored.rounded.InsertDriveFile
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import androidx.lifecycle.compose.LifecycleResumeEffect
 import kotlinx.coroutines.async
 import kotlinx.coroutines.launch
+import java.io.ByteArrayOutputStream
 
 // Screen enumeration for modular state-driven navigation (Zero Technical Debt)
 enum class AppScreen { Chat, Settings }
@@ -123,17 +130,14 @@ fun ChatScreen(
     val pendingFiles = remember { mutableStateListOf<PendingFile>() }
     val context = LocalContext.current
 
-    val filePicker = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+    var showAttachMenu by remember { mutableStateOf(false) }
-        uri ?: return@rememberLauncherForActivityResult
+
-        val cfg = session.config ?: return@rememberLauncherForActivityResult
+    fun uploadPickedFile(name: String, mimeType: String, bytes: ByteArray) {
-        val cr = context.contentResolver
+        val cfg = session.config ?: return
-        val mimeType = cr.getType(uri) ?: "application/octet-stream"
+        val pf = PendingFile(name = name, mimeType = mimeType, bytes = bytes)
-        val fileName = uri.lastPathSegment?.substringAfterLast('/') ?: "file"
-        val bytes = cr.openInputStream(uri)?.use { it.readBytes() } ?: return@rememberLauncherForActivityResult
-        val pf = PendingFile(name = fileName, mimeType = mimeType, bytes = bytes)
         pendingFiles.add(pf)
         scope.launch {
-            when (val r = KaizenApi.uploadFile(cfg.baseUrl, cfg.token, fileName, mimeType, bytes)) {
+            when (val r = KaizenApi.uploadFile(cfg.baseUrl, cfg.token, name, mimeType, bytes)) {
                 is FetchResult.Ok -> {
                     val idx = pendingFiles.indexOfFirst { it.id == pf.id }
                     if (idx >= 0) pendingFiles[idx] = pendingFiles[idx].copy(uploaded = r.data, uploading = false)
@@ -146,6 +150,22 @@ fun ChatScreen(
         }
     }
 
+    val filePicker = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+        uri ?: return@rememberLauncherForActivityResult
+        val cr = context.contentResolver
+        val mimeType = cr.getType(uri) ?: "application/octet-stream"
+        val fileName = uri.lastPathSegment?.substringAfterLast('/') ?: "file"
+        val bytes = cr.openInputStream(uri)?.use { it.readBytes() } ?: return@rememberLauncherForActivityResult
+        uploadPickedFile(fileName, mimeType, bytes)
+    }
+
+    val cameraPicker = rememberLauncherForActivityResult(ActivityResultContracts.TakePicturePreview()) { bitmap ->
+        bitmap ?: return@rememberLauncherForActivityResult
+        val stream = ByteArrayOutputStream()
+        bitmap.compress(android.graphics.Bitmap.CompressFormat.JPEG, 92, stream)
+        uploadPickedFile("photo_${System.currentTimeMillis()}.jpg", "image/jpeg", stream.toByteArray())
+    }
+
     LaunchedEffect(session.config?.baseUrl, session.config?.token) {
         val cfg = session.config ?: return@LaunchedEffect
         loadError = null
@@ -525,15 +545,37 @@ fun ChatScreen(
                                 },
                             )
                             Spacer(Modifier.height(10.dp))
+                            Box {
                                 ChatInput(
                                     value = input,
                                     onValueChange = { input = it },
                                     onSend = { send(input) },
                                     enabled = !isStreaming,
                                     pendingFiles = pendingFiles,
-                                onAddClick = { filePicker.launch("*/*") },
+                                    onAddClick = { showAttachMenu = true },
                                     onRemoveFile = { id -> pendingFiles.removeAll { it.id == id } },
                                 )
+                                DropdownMenu(
+                                    expanded = showAttachMenu,
+                                    onDismissRequest = { showAttachMenu = false },
+                                ) {
+                                    DropdownMenuItem(
+                                        text = { Text(stringResource(R.string.attach_camera)) },
+                                        onClick = { showAttachMenu = false; cameraPicker.launch(null) },
+                                        leadingIcon = { Icon(Icons.Rounded.CameraAlt, null, modifier = Modifier.size(20.dp)) },
+                                    )
+                                    DropdownMenuItem(
+                                        text = { Text(stringResource(R.string.attach_gallery)) },
+                                        onClick = { showAttachMenu = false; filePicker.launch("image/*") },
+                                        leadingIcon = { Icon(Icons.Rounded.Image, null, modifier = Modifier.size(20.dp)) },
+                                    )
+                                    DropdownMenuItem(
+                                        text = { Text(stringResource(R.string.attach_file)) },
+                                        onClick = { showAttachMenu = false; filePicker.launch("*/*") },
+                                        leadingIcon = { Icon(Icons.AutoMirrored.Rounded.InsertDriveFile, null, modifier = Modifier.size(20.dp)) },
+                                    )
+                                }
+                            }
                             Spacer(Modifier.height(16.dp))
                         }
 

app/src/main/res/values-en/strings.xml

@@ -18,6 +18,9 @@
     <string name="chat_remove">Remove</string>
     <string name="chat_error">Error</string>
     <string name="chat_open_menu">Open menu</string>
+    <string name="attach_camera">Take Photo</string>
+    <string name="attach_gallery">Photo &amp; Video</string>
+    <string name="attach_file">Choose File</string>
 
     <!-- Stream blocks -->
     <string name="stream_reasoning">Reasoning</string>

app/src/main/res/values/strings.xml

@@ -20,6 +20,9 @@
     <string name="chat_remove">Entfernen</string>
     <string name="chat_error">Fehler</string>
     <string name="chat_open_menu">Menü öffnen</string>
+    <string name="attach_camera">Foto aufnehmen</string>
+    <string name="attach_gallery">Foto &amp; Video</string>
+    <string name="attach_file">Datei auswählen</string>
 
     <!-- Stream blocks -->
     <string name="stream_reasoning">Gedankengang</string>