Add swipe hint for empty first column in task kanban

Shows a subtle "Swipe to see your tasks" hint centered on the first
column (Overdue) when it's empty but other columns have tasks. The
hint uses the theme primary color and scrolls with the column.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

iosApp/iosApp/Localizable.xcstrings

@@ -24926,6 +24926,10 @@
       "comment" : "The title of an alert that appears when a user successfully upgrades to a premium subscription.",
       "isCommentAutoGenerated" : true
     },
+    "Swipe to see your tasks" : {
+      "comment" : "A hint displayed in the \"Tasks\" section of the app, encouraging users to swipe to view their tasks.",
+      "isCommentAutoGenerated" : true
+    },
     "Take your home management\nto the next level" : {
 
     },