test(03-01): add failing tests for setup backend

- Add setups and setupItems tables to DB schema
- Add Zod schemas for setup create/update/sync
- Add Setup/SetupItem types to shared types
- Add setup tables to test helper
- Write service and route tests (RED - no implementation yet)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/helpers/db.ts

@@ -58,6 +58,23 @@ export function createTestDb() {
     )
   `);
 
+  sqlite.run(`
+    CREATE TABLE setups (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      name TEXT NOT NULL,
+      created_at INTEGER NOT NULL DEFAULT (unixepoch()),
+      updated_at INTEGER NOT NULL DEFAULT (unixepoch())
+    )
+  `);
+
+  sqlite.run(`
+    CREATE TABLE setup_items (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      setup_id INTEGER NOT NULL REFERENCES setups(id) ON DELETE CASCADE,
+      item_id INTEGER NOT NULL REFERENCES items(id) ON DELETE CASCADE
+    )
+  `);
+
   sqlite.run(`
     CREATE TABLE settings (
       key TEXT PRIMARY KEY,