[fix] limit remote ID input to nine digits without flicker

apps/desktop/src/gui/application/gui_application.cpp

@@ -343,10 +343,14 @@ std::string FormatPeerId(const char* id) {
 
 std::string FormatRemotePeerIdInput(std::string_view input) {
   std::string digits = gallery::Workspace::NormalizeId(std::string(input));
-  if (digits.size() > 9 ||
+  digits.erase(std::remove_if(digits.begin(), digits.end(),
-      !std::all_of(digits.begin(), digits.end(),
+                              [](unsigned char c) {
-                   [](unsigned char c) { return c >= '0' && c <= '9'; }))
+                                return c < '0' || c > '9';
-    return digits;
+                              }),
+               digits.end());
+  if (digits.size() > 9) {
+    digits.resize(9);
+  }
   if (digits.size() > 3) {
     digits.insert(3, " ");
   }

apps/desktop/src/gui/ui/main_window.slint

@@ -958,7 +958,16 @@ export component MainWindow inherits Window {
                         accessible-label: UiStrings.remote-id;
                         vertical-alignment: center;
                         selection-foreground-color: white; selection-background-color: WorkbenchStyle.accent;
-                        edited => { root.connection-input-error = ""; remote-id-format-timer.running = true; }
+                        edited => {
+                            root.connection-input-error = "";
+                            // Enforce the digit limit before the next frame can
+                            // render the text from typing, paste, or replacement.
+                            let formatted = root.format-remote-id(self.text);
+                            self.text = formatted;
+                            // Formatted IDs are ASCII, so these are UTF-8 offsets.
+                            self.set-selection-offsets(
+                                formatted.character-count, formatted.character-count);
+                        }
                         accepted => { if !root.connection-pending { root.connect-requested(root.remote-id-input); } }
                     }
                 }
@@ -1567,22 +1576,6 @@ export component MainWindow inherits Window {
         running: root.copy-feedback != CopyFeedback.idle;
         triggered => { root.copy-feedback = CopyFeedback.idle; }
     }
-    remote-id-format-timer := Timer {
-        interval: 1ms;
-        running: false;
-        triggered => {
-            // Use the running property for both transitions. restart() resumes
-            // the native repeating timer without restoring this property, so
-            // a later stop() cannot change it and the selection keeps resetting.
-            self.stop();
-            let formatted = root.format-remote-id(root.remote-id-input);
-            root.remote-id-input = formatted;
-            // IDs are ASCII-only, so character-count is also the UTF-8 offset
-            // expected by set-selection-offsets().
-            remote-id-editor.set-selection-offsets(
-                formatted.character-count, formatted.character-count);
-        }
-    }
     // Float above the workbench while keeping modal dialogs in front.
     if !root.gallery-mode && root.copy-feedback != CopyFeedback.idle: WorkbenchNotice {
         x: (parent.width - self.width) / 2;