feat: add set-as-my-location from map long-press, connector and UI improvements

Add "Set as my location" option to the map long-press bottom sheet,
allowing users to set their device position directly from the map.
Includes connector, chat, contacts, and message retry service improvements.

lib/l10n/app_zh.arb

@@ -1892,5 +1892,6 @@
   "tcpErrorUnsupported": "此平台不支持 TCP 传输。",
   "tcpErrorTimedOut": "TCP 连接超时。",
   "tcpConnectionFailed": "TCP 连接失败：{error}",
-  "map_showDiscoveryContacts": "显示发现联系人"
+  "map_showDiscoveryContacts": "显示发现联系人",
+  "map_setAsMyLocation": "设置为我的位置"
 }