Make mini-lit a peer dependency in pi-web-ui

- Move mini-lit from dependencies to peerDependencies
- Keep in devDependencies for development
- Prevents bundlers from including mini-lit when consuming pi-web-ui
- Consumer (sitegeist) provides mini-lit, esbuild bundles it once
- Fixes duplicate mini-lit bundling issue permanently

packages/web-ui/src/ChatPanel.ts

@@ -141,6 +141,7 @@ export class ChatPanel extends LitElement {
 		this.artifactCount = this.artifactsPanel.artifacts.size;
 
 		this.requestUpdate();
+		console.log("ChatPanel: Agent set with tools:", tools);
 	}
 
 	render() {