fix: resolve all lint errors across source and test files

- Fix unused function parameters (prefix with _)
- Fix unused imports in test files
- Fix import ordering in test files
- Auto-fix formatting issues across 22 files

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

tests/services/profile.service.test.ts

@@ -12,7 +12,7 @@ import {
 	getSetupWithItems,
 	updateSetup,
 } from "../../src/server/services/setup.service.ts";
-import { createSecondTestUser, createTestDb } from "../helpers/db.ts";
+import { createTestDb } from "../helpers/db.ts";
 
 type Db = Awaited<ReturnType<typeof createTestDb>>["db"];
 
@@ -72,11 +72,11 @@ describe("Profile Service", () => {
 
 		it("returns only public setups, not private ones", async () => {
 			// Create one public and one private setup
-			const pub = await createSetup(db, userId, {
+			const _pub = await createSetup(db, userId, {
 				name: "Public Setup",
 				isPublic: true,
 			});
-			const priv = await createSetup(db, userId, { name: "Private Setup" });
+			const _priv = await createSetup(db, userId, { name: "Private Setup" });
 
 			const profile = await getPublicProfile(db, userId);
 			expect(profile).not.toBeNull();