fix: board and workspace URL links and copy behavior (#357)

- Use /boards/{id} for private board links so copied link works; keep pretty URL for public boards
- Show matching path in board header (pretty path for public, boards/id for private)
- Copy link button copies URL to clipboard instead of opening in new tab (opening a new tab seems redundant since we're already on it)
- Edit workspace URL button links to /settings/workspace instead of account settings

apps/web/src/views/board/components/UpdateBoardSlugForm.tsx

@@ -156,7 +156,7 @@ export function UpdateBoardSlugForm({
         <div className="flex items-center gap-2">
           <Button
             variant="secondary"
-            href="/settings?tab=workspace"
+            href="/settings/workspace"
             onClick={closeModal}
           >
             {t`Edit workspace URL`}