fix(chat): scroll long composer model names (#1129)

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

@@ -1,16 +1,26 @@
 package com.m57.hermescontrol.ui.chat.components
 
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.width
+import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.getUnclippedBoundsInRoot
 import androidx.compose.ui.test.junit4.createComposeRule
 import androidx.compose.ui.test.onNodeWithTag
 import androidx.compose.ui.test.onNodeWithText
 import androidx.compose.ui.test.performClick
 import androidx.compose.ui.test.performTextInput
+import androidx.compose.ui.test.performTouchInput
+import androidx.compose.ui.test.swipeLeft
 import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.MediumTest
 import com.m57.hermescontrol.data.ws.CommandCatalog
@@ -36,30 +46,46 @@ class ComposerInteractionTest {
     private var selectedLevel: String? = null
 
     /** Renders the real input bar with live text and a mic that toggles like ChatMediaLaunchers. */
-    private fun setComposer(reasoningLevel: String? = "medium") {
+    private fun setComposer(
+        reasoningLevel: String? = "medium",
+        model: String = "openai/gpt-5.5",
+        composerWidth: Dp? = null,
+        modelAfterTap: String? = null,
+    ) {
         composeTestRule.setContent {
             var input by remember { mutableStateOf(TextFieldValue("")) }
             var listening by remember { mutableStateOf(false) }
-            ChatInputBar(
-                inputFieldValue = input,
-                onInputChange = { input = it },
-                onSend = {
-                    sends++
-                    input = TextFieldValue("")
-                },
-                onMicTap = {
-                    micTaps++
-                    listening = !listening
-                },
-                isListening = listening,
-                isAgentTyping = false,
-                isConnected = true,
-                commandCatalog = CommandCatalog(),
-                currentSessionModel = "openai/gpt-5.5",
-                reasoningLevel = reasoningLevel,
-                onModelTap = { modelTaps++ },
-                onReasoningTap = { selectedLevel = it },
-            )
+            var currentModel by remember { mutableStateOf(model) }
+            val composer: @Composable () -> Unit = {
+                ChatInputBar(
+                    inputFieldValue = input,
+                    onInputChange = { input = it },
+                    onSend = {
+                        sends++
+                        input = TextFieldValue("")
+                    },
+                    onMicTap = {
+                        micTaps++
+                        listening = !listening
+                    },
+                    isListening = listening,
+                    isAgentTyping = false,
+                    isConnected = true,
+                    commandCatalog = CommandCatalog(),
+                    currentSessionModel = currentModel,
+                    reasoningLevel = reasoningLevel,
+                    onModelTap = {
+                        modelTaps++
+                        modelAfterTap?.let { currentModel = it }
+                    },
+                    onReasoningTap = { selectedLevel = it },
+                )
+            }
+            if (composerWidth == null) {
+                composer()
+            } else {
+                Box(Modifier.width(composerWidth).testTag("composer_toolbar")) { composer() }
+            }
         }
     }
 
@@ -151,4 +177,74 @@ class ComposerInteractionTest {
             assertEquals("reasoning side must not open the model picker", 0, modelTaps)
         }
     }
+
+    @Test
+    fun longModelName_narrowComposer_scrollsWithoutOpeningPicker_orHidingControls() {
+        val longModel = "openrouter/some-extremely-long-model-name-preview-2026-with-extra-characters"
+        setComposer(model = longModel, composerWidth = 280.dp)
+
+        composeTestRule.onNodeWithTag("reasoning_chip").assertIsDisplayed()
+        composeTestRule.onNodeWithTag("mic_button").assertIsDisplayed()
+        val modelText = composeTestRule.onNodeWithText(longModel)
+        val leftBefore = modelText.getUnclippedBoundsInRoot().left
+
+        composeTestRule.onNodeWithTag("model_chip").performTouchInput { swipeLeft() }
+        val leftAfter = modelText.getUnclippedBoundsInRoot().left
+
+        composeTestRule.runOnIdle {
+            assertEquals("swiping the model must not open the picker", 0, modelTaps)
+        }
+        check(leftAfter < leftBefore) { "model text did not move after horizontal swipe" }
+        composeTestRule.onNodeWithTag("reasoning_chip").assertIsDisplayed()
+        composeTestRule.onNodeWithTag("mic_button").assertIsDisplayed()
+    }
+
+    @Test
+    fun shortModelName_wideComposerKeepsPillCompact() {
+        setComposer(composerWidth = 420.dp)
+
+        val toolbarBounds =
+            composeTestRule
+                .onNodeWithTag("composer_toolbar", useUnmergedTree = true)
+                .getUnclippedBoundsInRoot()
+        val toolbarWidth = toolbarBounds.right - toolbarBounds.left
+        val modelChip = composeTestRule.onNodeWithTag("model_chip").getUnclippedBoundsInRoot()
+        val reasoningChip = composeTestRule.onNodeWithTag("reasoning_chip").getUnclippedBoundsInRoot()
+        val actionButton = composeTestRule.onNodeWithTag("mic_button").getUnclippedBoundsInRoot()
+        val pillWidth = maxOf(modelChip.right, reasoningChip.right) - minOf(modelChip.left, reasoningChip.left)
+
+        check(pillWidth < toolbarWidth * 0.8f) {
+            "short model pill should remain content-sized, width=$pillWidth toolbar=$toolbarWidth"
+        }
+        check(actionButton.right > toolbarBounds.right - 32.dp) {
+            "trailing action should stay near the toolbar edge, right=${actionButton.right} toolbarRight=${toolbarBounds.right}"
+        }
+    }
+
+    @Test
+    fun changingModel_resetsScrolledLabelToTheStart() {
+        val firstModel = "openrouter/some-extremely-long-model-name-preview-2026-with-extra-characters"
+        val secondModel = "anthropic/another-extremely-long-model-name-preview-2026-with-extra-characters"
+        setComposer(model = firstModel, modelAfterTap = secondModel, composerWidth = 280.dp)
+
+        val firstText = composeTestRule.onNodeWithText(firstModel)
+        val leftBefore = firstText.getUnclippedBoundsInRoot().left
+        composeTestRule.onNodeWithTag("model_chip").performTouchInput { swipeLeft() }
+        check(firstText.getUnclippedBoundsInRoot().left < leftBefore) {
+            "first model text did not move after horizontal swipe"
+        }
+
+        composeTestRule.onNodeWithTag("model_chip").performClick()
+        val secondText = composeTestRule.onNodeWithText(secondModel)
+        val leftAfterModelChange = secondText.getUnclippedBoundsInRoot().left
+
+        check(leftAfterModelChange >= leftBefore - 1.dp) {
+            "new model label should reset to its initial left position"
+        }
+        composeTestRule.onNodeWithTag("reasoning_chip").assertIsDisplayed()
+        composeTestRule.onNodeWithTag("mic_button").assertIsDisplayed()
+        composeTestRule.runOnIdle {
+            assertEquals("model selection should still invoke the picker", 1, modelTaps)
+        }
+    }
 }

app/src/main/java/com/m57/hermescontrol/ui/chat/components/ComposerToolbar.kt

@@ -8,17 +8,21 @@ import androidx.compose.animation.scaleIn
 import androidx.compose.animation.scaleOut
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.layout.wrapContentHeight
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.Send
@@ -40,6 +44,7 @@ import androidx.compose.material3.Switch
 import androidx.compose.material3.SwitchDefaults
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -47,6 +52,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.clipToBounds
 import androidx.compose.ui.draw.scale
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.stringResource
@@ -127,32 +133,46 @@ fun ComposerToolbar(
 
         // Model + reasoning pill — wraps its content inside the free space,
         // pushing the mic/action buttons to the far end
+        val modelScrollState = rememberScrollState()
+        LaunchedEffect(currentSessionModel) {
+            modelScrollState.scrollTo(0)
+        }
         Box(modifier = Modifier.weight(1f), contentAlignment = Alignment.CenterStart) {
             Row(
                 modifier =
                     Modifier
+                        .width(IntrinsicSize.Max)
                         .height(ControlSize)
                         .clip(CircleShape)
                         .background(palette.control),
                 verticalAlignment = Alignment.CenterVertically,
             ) {
-                Text(
-                    // Keeps the provider so same-named models from different providers
-                    // stay distinguishable; trims from the middle when tight.
-                    text = currentSessionModel?.let(::composerModelLabel) ?: "Model",
-                    style = MaterialTheme.typography.bodyMedium,
-                    color = palette.onControl,
-                    maxLines = 1,
-                    overflow = TextOverflow.MiddleEllipsis,
+                Box(
                     modifier =
                         Modifier
-                            .weight(1f, fill = false)
+                            .weight(1f)
                             .fillMaxHeight()
+                            .clipToBounds()
+                            .horizontalScroll(modelScrollState)
                             .clickable(onClick = onModelTap)
-                            .wrapContentHeight()
-                            .padding(start = 16.dp, end = 6.dp)
                             .testTag("model_chip"),
-                )
+                ) {
+                    Text(
+                        // Keeps the provider so same-named models from different providers
+                        // stay distinguishable while allowing the full label to be revealed.
+                        text = currentSessionModel?.let(::composerModelLabel) ?: "Model",
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = palette.onControl,
+                        maxLines = 1,
+                        softWrap = false,
+                        overflow = TextOverflow.Clip,
+                        modifier =
+                            Modifier
+                                .fillMaxHeight()
+                                .wrapContentHeight()
+                                .padding(start = 16.dp, end = 6.dp),
+                    )
+                }
 
                 Box {
                     Row(