feat: Add CalendarSelector component and install new dependencies.

server/db.js

@@ -0,0 +1,52 @@
+const Database = require('better-sqlite3');
+const path = require('path');
+
+const dbPath = path.resolve(__dirname, 'eventy.db');
+const db = new Database(dbPath);
+
+// Enable WAL mode for better concurrency
+db.pragma('journal_mode = WAL');
+
+function initDb() {
+  const schema = `
+    CREATE TABLE IF NOT EXISTS events (
+      id TEXT PRIMARY KEY,
+      name TEXT NOT NULL,
+      description TEXT,
+      start_date TEXT NOT NULL,
+      end_date TEXT NOT NULL,
+      created_at TEXT DEFAULT (datetime('now'))
+    );
+
+    CREATE TABLE IF NOT EXISTS participants (
+      id TEXT PRIMARY KEY,
+      event_id TEXT NOT NULL,
+      name TEXT NOT NULL,
+      created_at TEXT DEFAULT (datetime('now')),
+      FOREIGN KEY (event_id) REFERENCES events(id) ON DELETE CASCADE
+    );
+
+    CREATE TABLE IF NOT EXISTS votes (
+      id TEXT PRIMARY KEY,
+      participant_id TEXT NOT NULL,
+      date TEXT NOT NULL,
+      status TEXT CHECK(status IN ('available', 'unavailable', 'maybe')) NOT NULL,
+      FOREIGN KEY (participant_id) REFERENCES participants(id) ON DELETE CASCADE,
+      UNIQUE(participant_id, date)
+    );
+
+    CREATE TABLE IF NOT EXISTS event_dates (
+      event_id TEXT NOT NULL,
+      date TEXT NOT NULL,
+      PRIMARY KEY (event_id, date),
+      FOREIGN KEY (event_id) REFERENCES events(id) ON DELETE CASCADE
+    );
+  `;
+  db.exec(schema);
+  console.log('Database initialized');
+}
+
+module.exports = {
+  db,
+  initDb
+};