config: add mouse-follows-focus option

toml-config/src/config.rs

@@ -563,6 +563,7 @@ pub struct Config {
     pub workspace_display_order: Option<WorkspaceDisplayOrder>,
     pub simple_im: Option<SimpleIm>,
     pub fallback_output_mode: Option<FallbackOutputMode>,
+    pub mouse_follows_focus: Option<bool>,
 }
 
 #[derive(Debug, Error)]

toml-config/src/config/parsers/config.rs

@@ -154,6 +154,7 @@ impl Parser for ConfigParser<'_> {
                 fallback_output_mode_val,
                 egui_val,
                 clean_logs_older_than_val,
+                mouse_follows_focus,
             ),
         ) = ext.extract((
             (
@@ -214,6 +215,7 @@ impl Parser for ConfigParser<'_> {
                 opt(val("fallback-output-mode")),
                 opt(val("egui")),
                 opt(val("clean-logs-older-than")),
+                recover(opt(bol("unstable-mouse-follows-focus"))),
             ),
         ))?;
         let mut keymap = None;
@@ -615,6 +617,7 @@ impl Parser for ConfigParser<'_> {
             workspace_display_order,
             simple_im,
             fallback_output_mode,
+            mouse_follows_focus: mouse_follows_focus.despan(),
         })
     }
 }

toml-config/src/lib.rs

@@ -1664,6 +1664,12 @@ fn load_config(initial_load: bool, auto_reload: bool, persistent: &Rc<Persistent
     if let Some(f) = &config.egui.monospace_fonts {
         set_egui_monospace_fonts(f.iter().map(|s| &**s));
     }
+    if let Some(mouse_follows_focus) = config.mouse_follows_focus {
+        #[expect(deprecated)]
+        persistent
+            .seat
+            .unstable_set_mouse_follows_focus(mouse_follows_focus);
+    }
 }
 
 fn create_command(exec: &Exec) -> Command {