feat: configure mobile width threshold (#317)

2 files changed, 31 insertions, 0 deletions

diff --git a/src/app/mod.rs b/src/app/mod.rs
index cad09a71..12fb704e 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -478,6 +478,7 @@ impl App {
             sidebar_width,
             sidebar_min_width,
             sidebar_max_width,
+            mobile_width_threshold: config.ui.mobile_width_threshold,
             sidebar_width_source,
             sidebar_width_auto: false,
             sidebar_collapsed: false,
@@ -1079,6 +1080,7 @@ impl App {
                 }
                 self.state.sidebar_min_width = config.ui.sidebar_min_width;
                 self.state.sidebar_max_width = config.ui.sidebar_max_width;
+                self.state.mobile_width_threshold = config.ui.mobile_width_threshold;
                 // Re-clamp the live width to the new bounds. No source guard — bounds
                 // always apply, including to widths owned by Persisted or Manual.
                 self.state.sidebar_width = self
@@ -1778,6 +1780,10 @@ mod tests {
         // Default bounds.
         assert_eq!(app.state.sidebar_min_width, 18);
         assert_eq!(app.state.sidebar_max_width, 36);
+        assert_eq!(
+            app.state.mobile_width_threshold,
+            crate::config::DEFAULT_MOBILE_WIDTH_THRESHOLD
+        );
 
         // Manually set a width and flip the source so the existing
         // sidebar_width-only-when-config-owned guard does NOT update it.
@@ -1818,6 +1824,29 @@ mod tests {
     }
 
     #[test]
+    fn reload_config_updates_mobile_width_threshold() {
+        let _guard = config_env_lock().lock().unwrap();
+        let path = temp_config_path("reload-config-mobile-width-threshold");
+        std::fs::create_dir_all(path.parent().unwrap()).unwrap();
+        std::env::set_var(crate::config::CONFIG_PATH_ENV_VAR, &path);
+
+        let mut app = test_app();
+        assert_eq!(
+            app.state.mobile_width_threshold,
+            crate::config::DEFAULT_MOBILE_WIDTH_THRESHOLD
+        );
+
+        std::fs::write(&path, "[ui]\nmobile_width_threshold = 96\n").unwrap();
+        let report = app.reload_config();
+
+        assert_eq!(report.status, crate::config::ConfigReloadStatus::Applied);
+        assert_eq!(app.state.mobile_width_threshold, 96);
+
+        std::env::remove_var(crate::config::CONFIG_PATH_ENV_VAR);
+        let _ = std::fs::remove_dir_all(path.parent().unwrap());
+    }
+
+    #[test]
     fn app_new_falls_back_to_default_bounds_on_inverted_config() {
         let mut config = Config::default();
         config.ui.sidebar_min_width = 50;
diff --git a/src/app/state.rs b/src/app/state.rs
index de1db052..7c47973c 100644
--- a/src/app/state.rs
+++ b/src/app/state.rs
@@ -1119,6 +1119,7 @@ pub struct AppState {
     pub sidebar_width: u16,
     pub sidebar_min_width: u16,
     pub sidebar_max_width: u16,
+    pub mobile_width_threshold: u16,
     pub sidebar_width_source: SidebarWidthSource,
     pub sidebar_width_auto: bool,
     pub sidebar_collapsed: bool,
@@ -1424,6 +1425,7 @@ impl AppState {
             sidebar_width: 26,
             sidebar_min_width: 18,
             sidebar_max_width: 36,
+            mobile_width_threshold: crate::config::DEFAULT_MOBILE_WIDTH_THRESHOLD,
             sidebar_width_source: SidebarWidthSource::ConfigDefault,
             sidebar_width_auto: false,
             sidebar_collapsed: false,