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README.md

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+# Simple Todo API (Demo)
+
+This is a minimal, runnable RESTful API aligned with the plan. It uses Gin and an in-memory store.
+
+## Run
+
+```bash
+go run ./main.go
+```
+
+The server listens on `:8080`.
+
+## Frontend
+
+The UI is served from local files under `test/web` at `/`:
+
+```bash
+open http://localhost:8080/api
+```
+
+## Quick Demo
+
+```bash
+curl http://localhost:8080/api/health
+
+curl -X POST http://localhost:8080/api/v1/auth/login
+
+curl -X POST http://localhost:8080/api/v1/tasks \
+  -H 'Authorization: Bearer demo' \
+  -H 'Content-Type: application/json' \
+  -d '{"title":"Learn Gin","priority":1,"tags":["demo"]}'
+
+curl http://localhost:8080/api/v1/tasks \
+  -H 'Authorization: Bearer demo'
+```
+
+## Notes
+- Data is in-memory only; restart will clear it.
+- Auth is a placeholder; any non-empty `Authorization` header is accepted.