feat: add orchestration state progress indicator

- OrchestrationProgress stepper component with 5 phases
- Visual state: completed (green check), active (blue ring), pending (gray)
- Smooth CSS transitions between states
- Integrated into chat page, visible during streaming

Closes #8

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/routes/chat/+page.svelte

@@ -2,15 +2,19 @@
 	import type { ChatMessage } from '$lib/types';
 	import MessageList from '$lib/components/MessageList.svelte';
 	import MessageInput from '$lib/components/MessageInput.svelte';
+	import OrchestrationProgress from '$lib/components/OrchestrationProgress.svelte';
 	import { processRequest, OrchestratorError } from '$lib/services/orchestrator';
+	import { OrchestrationState } from '$lib/proto/llm_multiverse/v1/orchestrator_pb';
 
 	let messages: ChatMessage[] = $state([]);
 	let isStreaming = $state(false);
 	let error: string | null = $state(null);
 	let sessionId = $state(crypto.randomUUID());
+	let orchestrationState: OrchestrationState = $state(OrchestrationState.UNSPECIFIED);
 
 	async function handleSend(content: string) {
 		error = null;
+		orchestrationState = OrchestrationState.UNSPECIFIED;
 
 		const userMessage: ChatMessage = {
 			id: crypto.randomUUID(),
@@ -32,6 +36,7 @@
 
 		try {
 			for await (const response of processRequest(sessionId, content)) {
+				orchestrationState = response.state;
 				const idx = messages.length - 1;
 				messages[idx] = {
 					...messages[idx],
@@ -44,7 +49,6 @@
 					? `Error (${err.code}): ${err.message}`
 					: 'An unexpected error occurred';
 			error = msg;
-			// Update the assistant message with the error
 			const idx = messages.length - 1;
 			messages[idx] = {
 				...messages[idx],
@@ -63,6 +67,10 @@
 
 	<MessageList {messages} />
 
+	{#if isStreaming}
+		<OrchestrationProgress state={orchestrationState} />
+	{/if}
+
 	{#if isStreaming && messages.length > 0 && messages[messages.length - 1].content === ''}
 		<div class="flex justify-start px-4 pb-2">
 			<div class="flex items-center gap-1.5 rounded-2xl bg-gray-200 px-4 py-2.5">