01 — Walking skeleton: runnable app with Lists

What to build: A runnable single-process webapp. Opening it in a browser shows all Lists; the user can create a List and rename it. Data survives a server restart. This slice includes the project scaffold (Python + FastAPI + Jinja + htmx per ADR-0004) and the SQLite store with STRICT tables (per ADR-0003). No auth anywhere in the app (per ADR-0002).

Blocked by: None — can start immediately.

Status: done (commit 7e7d813, 2026-08-04)

☐ uvicorn-style single command starts the app and creates the database file if absent
☐ Home page lists all Lists; empty state is handled gracefully
☐ User can create a List and rename it from the browser (htmx, no full-page reload required)
☐ All tables are declared STRICT; booleans/timestamps carry CHECK constraints
☐ Restarting the server preserves all data
☐ Tests cover List creation and renaming end to end