fix(dynmode): one toggle keeps DYNMODE's sign in step

F12, the drafting dialog and restored settings each re-derived DYNMODE and
lost the mode on the way: F12 off set 0, so on came back as 3 even after
DYNMODE 1. set_dyn_input now makes off negative (temporarily off) and on
restore the stored mode, and the bare query prints the stored value.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/update/file.rs

@@ -750,8 +750,8 @@ impl OpenCADStudio {
 
     /// Apply restored preferences to live state.
     pub(in crate::app) fn apply_settings(&mut self, s: &crate::app::settings::UserSettings) {
-        self.dyn_input = s.dyn_input;
-        self.dyn_mode = if s.dyn_mode != 0 { s.dyn_mode } else if s.dyn_input { 3 } else { 0 };
+        self.dyn_mode = s.dyn_mode;
+        self.set_dyn_input(s.dyn_input);
         self.polar_mode = s.polar;
         self.polar_increment_deg = s.polar_increment_deg;
         self.zoom_wheel_reversed = s.zoom_wheel_reversed;

src/app/update/mod.rs

@@ -4196,12 +4196,7 @@ impl OpenCADStudio {
                 Task::none()
             }
             Message::ToggleDynInput => {
-                self.dyn_input ^= true;
-                if self.dyn_input && self.dyn_mode <= 0 {
-                    self.dyn_mode = 3;
-                } else if !self.dyn_input && self.dyn_mode > 0 {
-                    self.dyn_mode = 0;
-                }
+                self.set_dyn_input(!self.dyn_input);
                 Task::none()
             }
             Message::ToggleViewCube => {