enh: image generation toggle

src/lib/components/chat/Placeholder.svelte

@@ -34,6 +34,7 @@
 	export let files = [];
 
 	export let selectedToolIds = [];
+	export let imageGenerationEnabled = false;
 	export let webSearchEnabled = false;
 
 	let models = [];
@@ -194,6 +195,7 @@
 					bind:prompt
 					bind:autoScroll
 					bind:selectedToolIds
+					bind:imageGenerationEnabled
 					bind:webSearchEnabled
 					bind:atSelectedModel
 					{transparentBackground}