feat: refactor frontend and fix LLM extraction

- Fix critical await bug in extract-stream endpoint
- Add comprehensive logging to LLM and parser modules
- Implement fallback to standard completion for incompatible models
- Create enhanced v2.0 prompts with social media handling and few-shot examples
- Add LLM health check endpoint
- Decompose share page into 6 focused Svelte 5 snippets

Resolves LM Studio integration issues and improves code maintainability

src/routes/api/extract-stream/+server.ts

@@ -40,7 +40,7 @@ export const POST: RequestHandler = async ({ request }) => {
 					timestamp: new Date().toISOString()
 				});
 
-				const recipe = extractRecipe(extracted.bodyText);
+				const recipe = await extractRecipe(extracted.bodyText);
 
 				// Send final result
 				const completeEvent: ProgressEvent = {