feat: server-based version with menu flagging, distributed polling, and SSE

Complete implementation including:
- Express server with Bessa API proxy
- Puppeteer scraper for menu data
- Flag storage (file-based persistence)
- SSE manager for real-time updates
- Polling orchestrator for distributed polling
- Frontend with weekly view, ordering, and flagging UI
- Yellow/green glow indicators for flagged items

debug_friday.js

@@ -0,0 +1,21 @@
+
+const SESS_KEY = 'c3418725e95a9f90e3645cbc846b4d67c7c66131';
+const URL = 'https://web.bessa.app/api/v1/venues/591/menu/7/2026-02-13/';
+
+async function run() {
+    try {
+        const response = await fetch(URL, {
+            headers: {
+                'Authorization': `Token ${SESS_KEY}`,
+                'Accept': 'application/json',
+                'X-Client-Version': '3.10.2'
+            }
+        });
+        const data = await response.json();
+        console.log(JSON.stringify(data, null, 2));
+    } catch (e) {
+        console.error(e);
+    }
+}
+
+run();