chore: clean up biome lint warnings — all non- intentional resolved

- Remove 25 unused imports across 14 test files
- Remove 1 unused variable (rename with _ prefix)
- Fix 2 noBannedTypes (Function → (...args: unknown[]) => unknown)
- Fix 1 useTemplate lint (string concat → template literal in merge-config.cjs)
- Fix 1 useNodejsImportProtocol (merge-config.cjs)
- Fix 2 noTemplateCurlyInString (generate-drizzle-schema.mjs generator code)
- Auto-fix formatting + import sorting across modified files
- 221 remaining warnings: intentional noExplicitAny in prisma-facade.ts (Prisma compat layer)
- 0 tsc errors, 583 tests passing

src/actions/admin-ads.test.ts

@@ -16,7 +16,7 @@ vi.mock("@/lib/prisma", () => ({
 }));
 vi.mock("@/lib/logger", () => ({ logger: { error: vi.fn() } }));
 vi.mock("@/lib/safe-action", () => ({
-	adminAction: vi.fn((_o: unknown, f: Function) => f),
+	adminAction: vi.fn((_o: unknown, f: (...args: unknown[]) => unknown) => f),
 }));
 vi.mock("@/lib/safe-action-shared", () => ({
 	ActionError: class extends Error {},