fix: resolve TabBar compilation errors

- Changed TabbarClickAction.selectedTab from let to var with default value
- Added TabbarClickAction as following action after successful feed data fetch
- This fixes the compilation errors in TabBar.swift

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

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

Author: graycreate

V2er/State/DataFlow/Actions/GlobalActions.swift

@@ -31,7 +31,7 @@ protocol InstanceIdentifiable {
 struct TabbarClickAction: Action {
     var target: Reducer = R
 
-    let selectedTab: TabId
+    var selectedTab: TabId = .feed
 }
 
 struct ShowToastAction: Action {

V2er/State/DataFlow/Reducers/FeedReducer.swift

@@ -25,6 +25,7 @@ func feedStateReducer(_ state: FeedState, _ action: Action) -> (FeedState, Actio
                 state.willLoadPage = 1
                 let supportsLoadMore = state.selectedTab.supportsLoadMore()
                 state.hasMoreData = supportsLoadMore
+                followingAction = TabbarClickAction();
             } else { }
         case let action as FeedActions.LoadMore.Start:
             guard !state.refreshing else { break }