feat(03-01): implement setup backend with junction table

- Setup service with CRUD, syncSetupItems, removeSetupItem
- SQL aggregation for itemCount, totalWeight, totalCost via COALESCE
- Hono routes for all 7 endpoints with zValidator
- Mount setupRoutes at /api/setups
- All 87 tests pass (24 new setup tests)

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

src/server/routes/setups.ts

@@ -0,0 +1,84 @@
+import { Hono } from "hono";
+import { zValidator } from "@hono/zod-validator";
+import {
+  createSetupSchema,
+  updateSetupSchema,
+  syncSetupItemsSchema,
+} from "../../shared/schemas.ts";
+import {
+  getAllSetups,
+  getSetupWithItems,
+  createSetup,
+  updateSetup,
+  deleteSetup,
+  syncSetupItems,
+  removeSetupItem,
+} from "../services/setup.service.ts";
+
+type Env = { Variables: { db?: any } };
+
+const app = new Hono<Env>();
+
+// Setup CRUD
+
+app.get("/", (c) => {
+  const db = c.get("db");
+  const setups = getAllSetups(db);
+  return c.json(setups);
+});
+
+app.post("/", zValidator("json", createSetupSchema), (c) => {
+  const db = c.get("db");
+  const data = c.req.valid("json");
+  const setup = createSetup(db, data);
+  return c.json(setup, 201);
+});
+
+app.get("/:id", (c) => {
+  const db = c.get("db");
+  const id = Number(c.req.param("id"));
+  const setup = getSetupWithItems(db, id);
+  if (!setup) return c.json({ error: "Setup not found" }, 404);
+  return c.json(setup);
+});
+
+app.put("/:id", zValidator("json", updateSetupSchema), (c) => {
+  const db = c.get("db");
+  const id = Number(c.req.param("id"));
+  const data = c.req.valid("json");
+  const setup = updateSetup(db, id, data);
+  if (!setup) return c.json({ error: "Setup not found" }, 404);
+  return c.json(setup);
+});
+
+app.delete("/:id", (c) => {
+  const db = c.get("db");
+  const id = Number(c.req.param("id"));
+  const deleted = deleteSetup(db, id);
+  if (!deleted) return c.json({ error: "Setup not found" }, 404);
+  return c.json({ success: true });
+});
+
+// Setup Items
+
+app.put("/:id/items", zValidator("json", syncSetupItemsSchema), (c) => {
+  const db = c.get("db");
+  const id = Number(c.req.param("id"));
+  const { itemIds } = c.req.valid("json");
+
+  const setup = getSetupWithItems(db, id);
+  if (!setup) return c.json({ error: "Setup not found" }, 404);
+
+  syncSetupItems(db, id, itemIds);
+  return c.json({ success: true });
+});
+
+app.delete("/:id/items/:itemId", (c) => {
+  const db = c.get("db");
+  const setupId = Number(c.req.param("id"));
+  const itemId = Number(c.req.param("itemId"));
+  removeSetupItem(db, setupId, itemId);
+  return c.json({ success: true });
+});
+
+export { app as setupRoutes };