added phrases for every empty peer type

flutter/lib/common/widgets/peer_tab_page.dart

@@ -167,7 +167,7 @@ class _PeerTabPageState extends State<PeerTabPage>
                         color: model.currentTab == t
                             ? Theme.of(context).colorScheme.background
                             : null,
-                        borderRadius: BorderRadius.circular(isDesktop ? 2 : 6),
+                        borderRadius: BorderRadius.circular(6),
                       ),
                       child: Align(
                         alignment: Alignment.center,

flutter/lib/common/widgets/peers_view.dart

@@ -1,8 +1,8 @@
 import 'dart:async';
+import 'dart:collection';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_hbb/consts.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 import 'package:visibility_detector/visibility_detector.dart';
@@ -30,6 +30,13 @@ class PeerSortType {
   ];
 }
 
+class LoadEvent {
+  static const String recent = 'load_recent_peers';
+  static const String favorite = 'load_fav_peers';
+  static const String lan = 'load_lan_peers';
+  static const String addressBook = 'load_address_book_peers';
+}
+
 /// for peer search text, global obs value
 final peerSearchText = "".obs;
 
@@ -61,6 +68,12 @@ class _PeersView extends StatefulWidget {
 /// State for the peer widget.
 class _PeersViewState extends State<_PeersView> with WindowListener {
   static const int _maxQueryCount = 3;
+  final HashMap<String, String> _emptyMessages = HashMap.from({
+    LoadEvent.recent: 'empty_recent_tip',
+    LoadEvent.favorite: 'empty_favorite_tip',
+    LoadEvent.lan: 'empty_lan_tip',
+    LoadEvent.addressBook: 'empty_address_book_tip',
+  });
   final space = isDesktop ? 12.0 : 8.0;
   final _curPeers = <String>{};
   var _lastChangeTime = DateTime.now();
@@ -112,12 +125,30 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
     return ChangeNotifierProvider<Peers>(
       create: (context) => widget.peers,
       child: Consumer<Peers>(
-          builder: (context, peers, child) => peers.peers.isEmpty
-              ? Container(
-                  margin: EdgeInsets.only(top: kEmptyMarginTop),
-                  alignment: Alignment.topCenter,
-                  child: Text(translate("Empty")))
-              : _buildPeersView(peers)),
+        builder: (context, peers, child) => peers.peers.isEmpty
+            ? Center(
+                child: Column(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    Icon(
+                      Icons.sentiment_very_dissatisfied_rounded,
+                      color: Theme.of(context).tabBarTheme.labelColor,
+                      size: 40,
+                    ).paddingOnly(bottom: 10),
+                    Text(
+                      translate(
+                        _emptyMessages[widget.peers.loadEvent] ?? 'Empty',
+                      ),
+                      textAlign: TextAlign.center,
+                      style: TextStyle(
+                        color: Theme.of(context).tabBarTheme.labelColor,
+                      ),
+                    ),
+                  ],
+                ),
+              )
+            : _buildPeersView(peers),
+      ),
     );
   }
 
@@ -221,7 +252,7 @@ class _PeersViewState extends State<_PeersView> with WindowListener {
       );
     }
 
-    if (widget.peers.loadEvent != 'load_recent_peers') {
+    if (widget.peers.loadEvent != LoadEvent.recent) {
       switch (sortedBy) {
         case PeerSortType.remoteId:
           peers.sort((p1, p2) => p1.getId().compareTo(p2.getId()));
@@ -289,7 +320,7 @@ class RecentPeersView extends BasePeersView {
       : super(
           key: key,
           name: 'recent peer',
-          loadEvent: 'load_recent_peers',
+          loadEvent: LoadEvent.recent,
           peerCardBuilder: (Peer peer) => RecentPeerCard(
             peer: peer,
             menuPadding: menuPadding,
@@ -311,7 +342,7 @@ class FavoritePeersView extends BasePeersView {
       : super(
           key: key,
           name: 'favorite peer',
-          loadEvent: 'load_fav_peers',
+          loadEvent: LoadEvent.favorite,
           peerCardBuilder: (Peer peer) => FavoritePeerCard(
             peer: peer,
             menuPadding: menuPadding,
@@ -333,7 +364,7 @@ class DiscoveredPeersView extends BasePeersView {
       : super(
           key: key,
           name: 'discovered peer',
-          loadEvent: 'load_lan_peers',
+          loadEvent: LoadEvent.lan,
           peerCardBuilder: (Peer peer) => DiscoveredPeerCard(
             peer: peer,
             menuPadding: menuPadding,
@@ -358,7 +389,7 @@ class AddressBookPeersView extends BasePeersView {
       : super(
           key: key,
           name: 'address book peer',
-          loadEvent: 'load_address_book_peers',
+          loadEvent: LoadEvent.addressBook,
           peerFilter: (Peer peer) =>
               _hitTag(gFFI.abModel.selectedTags, peer.tags),
           peerCardBuilder: (Peer peer) => AddressBookPeerCard(