fix: wire catalog add buttons, fix Trans bold rendering, lint cleanup

- CatalogSearchOverlay: replace handleAddStub with real openAddToCollection/openAddToThread routing based on catalogSearchMode
- ConfirmDialog + __root.tsx: swap t() for Trans component on deleteItemMessage, deleteCandidateMessage, pickWinnerMessage — fixes <bold> rendering as literal text
- Biome format pass: fix 23 lint/format errors across scripts, services, tests
- Planning: mark all UAT and verification gaps resolved for phases 07, 11, 16, 20, 21, 22, 24, 32, 34; close debug sessions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/services/discovery.service.test.ts

@@ -18,7 +18,10 @@ import { createTestDb } from "../helpers/db.ts";
 type TestDb = Awaited<ReturnType<typeof createTestDb>>;
 
 async function insertManufacturer(db: TestDb["db"], name: string) {
-	const slug = name.toLowerCase().replace(/\s+/g, "-").replace(/[^a-z0-9-]/g, "");
+	const slug = name
+		.toLowerCase()
+		.replace(/\s+/g, "-")
+		.replace(/[^a-z0-9-]/g, "");
 	const [existing] = await db
 		.select()
 		.from(manufacturers)