fix(ui): show actual LLM error; skip API key dialog for on-device providers

kmp/src/commonMain/kotlin/dev/stapler/stelekit/ui/components/settings/LlmProviderListScreen.kt

@@ -98,7 +98,12 @@ fun LlmProviderListScreen(
         }
 
         providers.forEachIndexed { index, provider ->
-            LlmProviderRow(provider = provider, onClick = { onEditProvider(provider.id) })
+            LlmProviderRow(
+                provider = provider,
+                onClick = if (provider.kind != LlmProviderKind.ON_DEVICE) {
+                    { onEditProvider(provider.id) }
+                } else null,
+            )
             if (index != providers.lastIndex) {
                 HorizontalDivider(modifier = Modifier.padding(vertical = 4.dp))
             }
@@ -108,7 +113,7 @@ fun LlmProviderListScreen(
 
 /** A single provider row — resolves [LlmProvider.checkAvailability] asynchronously per-row. */
 @Composable
-private fun LlmProviderRow(provider: LlmProvider, onClick: () -> Unit) {
+private fun LlmProviderRow(provider: LlmProvider, onClick: (() -> Unit)?) {
     // produceState re-runs the suspend block whenever `provider` changes identity; starts at
     // `null` ("Checking availability…") so we never render an optimistic default.
     val availability by produceState<LlmProviderAvailability?>(initialValue = null, provider) {
@@ -118,7 +123,7 @@ private fun LlmProviderRow(provider: LlmProvider, onClick: () -> Unit) {
     Row(
         modifier = Modifier
             .fillMaxWidth()
-            .clickable(onClick = onClick)
+            .then(if (onClick != null) Modifier.clickable(onClick = onClick) else Modifier)
             .padding(vertical = 10.dp),
         horizontalArrangement = Arrangement.SpaceBetween,
         verticalAlignment = Alignment.CenterVertically,
@@ -143,12 +148,14 @@ private fun LlmProviderRow(provider: LlmProvider, onClick: () -> Unit) {
 
         Row(verticalAlignment = Alignment.CenterVertically) {
             ProviderStatusIndicator(availability)
-            Spacer(modifier = Modifier.width(4.dp))
-            Icon(
-                Icons.Default.ChevronRight,
-                contentDescription = "Edit",
-                tint = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
+            if (onClick != null) {
+                Spacer(modifier = Modifier.width(4.dp))
+                Icon(
+                    Icons.Default.ChevronRight,
+                    contentDescription = "Edit",
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
         }
     }
 }

kmp/src/commonMain/kotlin/dev/stapler/stelekit/ui/components/settings/LlmProviderSettings.kt

@@ -30,6 +30,7 @@ import dev.stapler.stelekit.llm.CustomOpenAiCompatibleLlmProvider
 import dev.stapler.stelekit.llm.CustomProviderConfig
 import dev.stapler.stelekit.llm.LlmCredentialStore
 import dev.stapler.stelekit.llm.LlmFeature
+import dev.stapler.stelekit.llm.LlmProviderKind
 import dev.stapler.stelekit.llm.LlmProviderRegistry
 import dev.stapler.stelekit.llm.LlmSettings
 import io.ktor.client.HttpClient
@@ -79,9 +80,10 @@ fun LlmProviderSettings(
             onEditProvider = { id ->
                 if (id.startsWith("custom:")) {
                     editingCustomProviderId = id
-                } else {
+                } else if (registry.find(id)?.kind == LlmProviderKind.REMOTE) {
                     editingBuiltInProviderId = id
                 }
+                // ON_DEVICE and unknown kinds have no credentials — click is intentionally a no-op
             },
         )
 

kmp/src/commonMain/kotlin/dev/stapler/stelekit/ui/components/tags/SuggestionBottomSheet.kt

@@ -90,7 +90,7 @@ fun SuggestionBottomSheet(
 
                     if (state.llmError != null) {
                         Text(
-                            text = "Could not reach LLM",
+                            text = state.llmError,
                             style = MaterialTheme.typography.labelSmall,
                             color = MaterialTheme.colorScheme.error,
                             modifier = Modifier.padding(top = 8.dp),

kmp/src/commonMain/kotlin/dev/stapler/stelekit/ui/components/tags/TagChipRow.kt

@@ -61,7 +61,7 @@ fun TagChipRow(
         if (llmError != null) {
             Spacer(modifier = Modifier.width(8.dp))
             Text(
-                text = "Could not reach LLM",
+                text = llmError,
                 style = MaterialTheme.typography.labelSmall,
                 color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.6f),
             )