refactor: extract and reuse focusInput logic across components

Move focus logic to exported method and trigger it after conversation
resets to maintain input focus consistently throughout the UI flow.

Components/ChatWindow.svelte

@@ -40,6 +40,12 @@
 
   let currentThought: string | null = null;
 
+  export function focusInput() {
+    tick().then(() => {
+      textareaElement?.focus();
+    });
+  }
+
   onMount(() => {
     if (chatContainer) {
       plugin.registerDomEvent(chatContainer, 'click', handleLinkClick);
@@ -76,6 +82,7 @@
   }
 
   async function handleSubmit() {
+    focusInput();
     if (!await semaphore.wait()) {
       return;
     }
@@ -121,9 +128,6 @@
       currentThought = null;
       isSubmitting = false;
       semaphore.release();
-      tick().then(() => {
-        textareaElement?.focus();
-      });
     }
   }
 

Components/TopBar.svelte

@@ -9,6 +9,7 @@
 	import { openPluginSettings } from 'Helpers/Helpers';
 
   export let leaf: WorkspaceLeaf;
+  export let onNewConversation: (() => void) | undefined = undefined;
 
   const plugin = Resolve<AIAgentPlugin>(Services.AIAgentPlugin);
   const conversationService = Resolve<ConversationFileSystemService>(Services.ConversationFileSystemService);
@@ -16,15 +17,18 @@
   function startNewConversation() {
     conversationService.resetCurrentConversation();
     conversationStore.reset();
+    onNewConversation?.();
   }
 
   async function deleteCurrentConversation() {
     await conversationService.deleteCurrentConversation();
     conversationStore.reset();
+    onNewConversation?.();
   }
 
   function openConversationHistory() {
     const modal = Resolve<ConversationHistoryModal>(Services.ConversationHistoryModal);
+    modal.onModalClose = onNewConversation;
     modal.open();
   }
 

Modals/ConversationHistoryModal.ts

@@ -25,6 +25,7 @@ export class ConversationHistoryModal extends Modal {
     private component: Record<string, any> | null = null;
     private items: ListItem[];
     private conversations: Conversation[];
+    public onModalClose?: () => void;
 
     constructor(app: App) {
         super(app);
@@ -107,5 +108,7 @@ export class ConversationHistoryModal extends Modal {
 
         const { contentEl } = this;
         contentEl.empty();
+
+        this.onModalClose?.();
     }
 }

Views/MainView.ts

@@ -25,15 +25,16 @@ export class MainView extends ItemView {
     const container = this.contentEl;
     container.empty();
 
-    // Mount TopBar
+    // Mount TopBar with reference to ChatWindow's focus function
     this.topBar = mount(TopBar, {
       target: container,
       props: {
-        leaf: this.leaf
+        leaf: this.leaf,
+        onNewConversation: () => this.input?.focusInput()
       }
     });
 
-    // Mount ChatWindow
+    // Mount ChatWindow first
     this.input = mount(ChatWindow, {
       target: container,
       props: {}