irc: avoid reinit on append; set TextViewer.text to current buffer in refresh; rely on switcher refresh path

Signed-off-by: Slendi <slendi@socopon.com>

main.lua

@@ -270,12 +270,6 @@ function IrcChatView:appendLine(line, target)
         if self._ui_open then
             -- Reuse the same refresh path as the channel switcher
             self:refreshView(target)
-            -- Some platforms require a full widget re-init to repaint reliably
-            if UIManager and self.reinit then
-                UIManager:nextTick(function()
-                    if self._ui_open then self:reinit() end
-                end)
-            end
         end
     else
         -- increment unread counter for background target
@@ -455,7 +449,9 @@ function IrcChatView:refreshView(target)
     if not self._ui_open then return end
     self:preloadHistory(target)
     if self.scroll_text_w and self.scroll_text_w.text_widget then
-        self.scroll_text_w.text_widget:setText(self._buffers[target] or "")
+        local s = self._buffers[target] or ""
+        self.text = s
+        self.scroll_text_w.text_widget:setText(s)
         self.scroll_text_w:scrollToBottom()
         if self.scroll_text_w.updateScrollBar then
             self.scroll_text_w:updateScrollBar(true)