fix(app): restore input focus for running agents and align mobile model selector

- Add onDropdownClose callback to AgentStatusBar and wire through ControlledStatusBar
  to CombinedModelSelector so running agents focus input after any dropdown closes
- Fix mobile misalignment in model selector by adding marginHorizontal: spacing[1]
  to sectionHeading, drillDownRow, backButton, and providerSearchContainer to match
  ComboboxItem's mobile margins

packages/app/src/components/agent-input-area.tsx

@@ -640,7 +640,7 @@ export function AgentInputArea({
     resolveStatusControlMode(statusControls) === "draft" && statusControls ? (
       <DraftAgentStatusBar {...statusControls} />
     ) : (
-      <AgentStatusBar agentId={agentId} serverId={serverId} />
+      <AgentStatusBar agentId={agentId} serverId={serverId} onDropdownClose={focusInput} />
     );
 
   return (

packages/app/src/components/agent-status-bar.tsx

@@ -116,6 +116,7 @@ export interface DraftAgentStatusBarProps {
 interface AgentStatusBarProps {
   agentId: string;
   serverId: string;
+  onDropdownClose?: () => void;
 }
 
 function findOptionLabel(
@@ -409,6 +410,7 @@ function ControlledStatusBar({
                     onToggleFavorite={onToggleFavoriteModel}
                     isLoading={isModelLoading}
                     disabled={modelDisabled}
+                    onClose={onDropdownClose}
                   />
                 </View>
               </TooltipTrigger>
@@ -655,6 +657,7 @@ function ControlledStatusBar({
                   onToggleFavorite={onToggleFavoriteModel}
                   isLoading={isModelLoading}
                   disabled={modelDisabled}
+                  onClose={onDropdownClose}
                   renderTrigger={({ selectedModelLabel }) => (
                     <View
                       style={[
@@ -835,7 +838,7 @@ function ControlledStatusBar({
 
 const EMPTY_MODES: AgentMode[] = [];
 
-export function AgentStatusBar({ agentId, serverId }: AgentStatusBarProps) {
+export function AgentStatusBar({ agentId, serverId, onDropdownClose }: AgentStatusBarProps) {
   const { preferences, updatePreferences } = useFormPreferences();
   const agent = useSessionStore(
     useShallow((state) => {
@@ -1026,6 +1029,7 @@ export function AgentStatusBar({ agentId, serverId }: AgentStatusBarProps) {
         });
       }}
       isModelLoading={isProviderModelsQueryLoading(modelsQuery)}
+      onDropdownClose={onDropdownClose}
       disabled={!client}
     />
   );

packages/app/src/components/combined-model-selector.tsx

@@ -22,6 +22,8 @@ import type {
   AgentProvider,
 } from "@server/server/agent/agent-sdk-types";
 import type { AgentProviderDefinition } from "@server/server/agent/provider-manifest";
+const IS_WEB = Platform.OS === "web";
+
 import { Combobox, ComboboxItem } from "@/components/ui/combobox";
 import { Tooltip, TooltipTrigger, TooltipContent } from "@/components/ui/tooltip";
 import { getProviderIcon } from "@/components/provider-icons";
@@ -754,6 +756,7 @@ const styles = StyleSheet.create((theme) => ({
     paddingHorizontal: theme.spacing[3],
     paddingTop: theme.spacing[2],
     paddingBottom: theme.spacing[1],
+    ...(IS_WEB ? {} : { marginHorizontal: theme.spacing[1] }),
   },
   sectionHeadingText: {
     fontSize: theme.fontSize.xs,
@@ -767,6 +770,7 @@ const styles = StyleSheet.create((theme) => ({
     paddingHorizontal: theme.spacing[3],
     paddingVertical: theme.spacing[2],
     minHeight: 36,
+    ...(IS_WEB ? {} : { marginHorizontal: theme.spacing[1] }),
   },
   drillDownRowHovered: {
     backgroundColor: theme.colors.surface1,
@@ -801,6 +805,7 @@ const styles = StyleSheet.create((theme) => ({
     paddingVertical: theme.spacing[2],
     borderBottomWidth: 1,
     borderBottomColor: theme.colors.border,
+    ...(IS_WEB ? {} : { marginHorizontal: theme.spacing[1] }),
   },
   backButtonHovered: {
     backgroundColor: theme.colors.surface2,
@@ -853,6 +858,7 @@ const styles = StyleSheet.create((theme) => ({
     alignItems: "center",
     paddingHorizontal: theme.spacing[3],
     gap: theme.spacing[2],
+    ...(IS_WEB ? {} : { marginHorizontal: theme.spacing[1] }),
   },
   providerSearchInput: {
     flex: 1,