Initial implementation of temporal progress page

Seven particle-based progress cards (hour, day, week, month, year, summer, fall)
with work-time mode toggle and bridge days support. Light elegant design with
accumulating particle animation. Express server proxies dagsmart.se API.

server.js

@@ -0,0 +1,33 @@
+import express from 'express';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const app = express();
+
+app.use(express.static(join(__dirname, 'public')));
+
+app.get('/api/holidays', async (req, res) => {
+  const { year } = req.query;
+  try {
+    const response = await fetch(`https://api.dagsmart.se/holidays?year=${year}&weekends=false`);
+    const data = await response.json();
+    res.json(data);
+  } catch (err) {
+    res.status(500).json({ error: String(err) });
+  }
+});
+
+app.get('/api/bridge-days', async (req, res) => {
+  const { year } = req.query;
+  try {
+    const response = await fetch(`https://api.dagsmart.se/bridge-days?year=${year}`);
+    const data = await response.json();
+    res.json(data);
+  } catch (err) {
+    res.status(500).json({ error: String(err) });
+  }
+});
+
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => console.log(`Aftersummer → http://localhost:${PORT}`));