Initial release: collaborative trip planner

Multi-user trip planning web app in a single Docker container. Mullvad-style token accounts, trip sharing via join codes, day-by-day calendar with typed entries (activity, hotel, travel, flight, rental car, immigration, note), multi-leg flight segments with bundled IATA airport dataset, Leaflet/OSM map with per-leg great-circle km (air vs ground), rough km-driven vs rental included-km comparison, cost splitting with settle-up suggestions, flip-clock departure countdown. Node 20 + Express + SQLite (WAL, additive migrations), vanilla JS SPA, 44 API tests.

package.json

@@ -0,0 +1,23 @@
+{
+  "name": "trip-plan",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Self-hosted multi-user trip planning web tool",
+  "type": "module",
+  "engines": {
+    "node": ">=20"
+  },
+  "scripts": {
+    "start": "node src/server/index.js",
+    "dev": "node --watch src/server/index.js",
+    "test": "node --test tests/"
+  },
+  "dependencies": {
+    "better-sqlite3": "^11.5.0",
+    "cookie-session": "^2.1.0",
+    "express": "^4.19.2"
+  },
+  "devDependencies": {
+    "supertest": "^7.0.0"
+  }
+}