refactor: use GET tenders/recommend and improve tender title UX

Load the Recommended tab from GET /api/v1/tenders/recommend instead of the
AI POST flow with 503 fallback. Fix notification pagination offset, make
tender titles selectable across list and detail views, and ignore .cursor.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/views/board/pages/board_screen.dart

@@ -301,7 +301,7 @@ class _TaskCard extends StatelessWidget {
             ),
           ),
         if (due != null) const SizedBox(height: 12),
-        Text(
+        SelectableText(
           card.title ?? '',
           style: TextStyle(
             fontSize: 14,
@@ -309,7 +309,6 @@ class _TaskCard extends StatelessWidget {
             color: AppColors.grey70,
           ),
           maxLines: 3,
-          overflow: TextOverflow.ellipsis,
         ),
         const SizedBox(height: 12),
         if (card.priority != null) _PriorityChip(priority: card.priority!),