feat(ui): refine ribbon and view navigation

src/app/commands/inquiry.rs

@@ -4,8 +4,7 @@ impl OpenCADStudio {
     pub(super) fn dispatch_inquiry(&mut self, cmd: &str, i: usize) -> Option<Task<Message>> {
         match cmd {
             "3DORBIT" => {
-                self.command_line
-                    .push_info(crate::t!("3D Orbit: drag with right mouse button.").as_ref());
+                self.tabs[i].orbit_mode = true;
             }
 
             // ── Selection utilities ───────────────────────────────────────

src/app/commands/mod.rs

@@ -76,9 +76,10 @@ impl OpenCADStudio {
             // template-property override too (#239).
             self.restore_add_selected_defaults();
         }
-        // Starting any command leaves interactive PAN mode (the PAN arm below
-        // re-enables it).
+        // Starting any command leaves interactive navigation modes (their own
+        // command arms below re-enable the selected one).
         self.tabs[i].pan_mode = false;
+        self.tabs[i].orbit_mode = false;
         // Reset the last committed point so the first click of the new command
         // is not constrained by ortho/polar relative to a previous command's endpoint.
         self.last_point = None;