invoke stopResponse() if user deletes message during response generation

src/routes/(app)/+page.svelte

@@ -828,6 +828,7 @@
 					{sendPrompt}
 					{continueGeneration}
 					{regenerateResponse}
+					{stopResponse}
 				/>
 			</div>
 		</div>

src/routes/(app)/c/[id]/+page.svelte

@@ -858,6 +858,7 @@
 						{sendPrompt}
 						{continueGeneration}
 						{regenerateResponse}
+						{stopResponse}
 					/>
 				</div>
 			</div>