diff --git a/apps/desktop/src/components/editor/AiAssistant.vue b/apps/desktop/src/components/editor/AiAssistant.vue
index 29b36147f..9b9dc8861 100644
--- a/apps/desktop/src/components/editor/AiAssistant.vue
+++ b/apps/desktop/src/components/editor/AiAssistant.vue
@@ -203,9 +203,6 @@ async function changeConnection(connectionId: string) {
   } catch (e: unknown) {
     const message = e instanceof Error ? e.message : String(e);
     toast(t("connection.connectFailed", { message: translateBackendError(t, message) }), 5000);
-  } catch (e: unknown) {
-    const message = e instanceof Error ? e.message : String(e);
-    toast(t("connection.connectFailed", { message: translateBackendError(t, message) }), 5000);
   }
 }
 
@@ -374,13 +371,10 @@ async function loadMentionCandidates(query: string) {
     mentionCache.value[key] = candidates.slice(0, 40);
     mentionCandidates.value = mentionCache.value[key];
     mentionSelectedIndex.value = 0;
-  } catch (e: unknown) {
   } catch (e: unknown) {
     if (requestId !== mentionRequestId) return;
     const message = e instanceof Error ? e.message : String(e);
     mentionError.value = translateBackendError(t, message);
-    const message = e instanceof Error ? e.message : String(e);
-    mentionError.value = translateBackendError(t, message);
     mentionCandidates.value = [];
   } finally {
     if (requestId === mentionRequestId) mentionLoading.value = false;
@@ -508,7 +502,6 @@ async function send() {
   const sessionId = uuid();
   currentSessionId.value = sessionId;
   const agentEvents: AgentEvent[] = [];
-  const agentEvents: AgentEvent[] = [];
   try {
     const context = await buildAiContext(props.tab, props.connection, {
       mentionedTables,
@@ -517,7 +510,6 @@ async function send() {
       role: m.role,
       content: m.content,
     }));
-    await runAgentStream(
     await runAgentStream(
       {
         config: settings.aiConfig,
@@ -562,9 +554,6 @@ async function send() {
   } catch (e: unknown) {
     const message = e instanceof Error ? e.message : String(e);
     messages.value[assistantIdx].content = `Error: ${message}`;
-  } catch (e: unknown) {
-    const message = e instanceof Error ? e.message : String(e);
-    messages.value[assistantIdx].content = `Error: ${message}`;
   } finally {
     const msg = messages.value[assistantIdx];
     if (msg) msg.isThinking = false;
@@ -631,9 +620,6 @@ async function copyCode(code: string, key: string) {
   } catch (e: unknown) {
     const message = e instanceof Error ? e.message : String(e);
     toast(t("grid.copyFailed", { message }), 5000);
-  } catch (e: unknown) {
-    const message = e instanceof Error ? e.message : String(e);
-    toast(t("grid.copyFailed", { message }), 5000);
   }
 }
 
@@ -698,7 +684,6 @@ onMounted(async () => {
 onUnmounted(() => {
   clearTimeout(mentionTimer);
   cancelStream();
-  cancelStream();
 });
 
 function triggerAction(action: AiAction, instruction?: string) {
diff --git a/src-tauri/src/commands/ai.rs b/src-tauri/src/commands/ai.rs
index 3b32d0764..83dddfde2 100644
--- a/src-tauri/src/commands/ai.rs
+++ b/src-tauri/src/commands/ai.rs
@@ -46,10 +46,6 @@ use dbx_core::agent_events::AgentEvent;
 use dbx_core::agent_loop::{run_agent_loop, AgentLoopContext};
 use dbx_core::models::connection::DatabaseType;
 
-use dbx_core::agent_events::AgentEvent;
-use dbx_core::agent_loop::{run_agent_loop, AgentLoopContext};
-use dbx_core::models::connection::DatabaseType;
-
 #[tauri::command]
 pub async fn ai_cancel_stream(session_id: String) -> Result<bool, String> {
     Ok(dbx_core::ai::cancel_stream(&session_id).await)