feat: add share modal with visibility picker and link management

Create ShareModal component with three-tier visibility picker
(private/link/public), share link creation with configurable expiration,
clipboard copy, and link revocation. Wire into setup detail page
replacing the static visibility badge with an interactive share button.

Plan: 32-03 (Setup Sharing System - Share Modal UI)

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

src/shared/types.ts

@@ -23,10 +23,9 @@ import type {
 	createThreadSchema,
 	deleteAccountSchema,
 	reorderCandidatesSchema,
-	submitCommunityPriceSchema,
-	upsertMarketPriceSchema,
 	resolveThreadSchema,
 	searchGlobalItemsSchema,
+	submitCommunityPriceSchema,
 	syncSetupItemsSchema,
 	updateCandidateSchema,
 	updateCategorySchema,
@@ -36,6 +35,7 @@ import type {
 	updateSetupSchema,
 	updateThreadSchema,
 	upsertGlobalItemSchema,
+	upsertMarketPriceSchema,
 } from "./schemas.ts";
 
 // Types inferred from Zod schemas