fix: simplify special tab chrome

nebula_app/src/display/chrome.rs

@@ -1186,6 +1186,10 @@ pub(super) fn draw_chrome(d: &mut Display) {
         ICON_SETTINGS,
     );
     for (hit, cx, cy) in chrome_control_centers(w, top_y, bar_h, scale) {
+        if d.nebula_special_tab_active && matches!(hit, ChromeHit::PanelFiles | ChromeHit::PanelGit)
+        {
+            continue;
+        }
         let hovered = d.nebula_chrome_hover == hit;
         let icon = match hit {
             ChromeHit::Minimize => ICON_CHROME_MINIMIZE,
@@ -1245,7 +1249,7 @@ pub(super) fn draw_chrome(d: &mut Display) {
             section_title_tracking,
             TXT_DIM,
             section_title_flags,
-            &format!("{}  {tabs_chevron}", language.pick("标签页", "TABS")),
+            &format!("TABS  {tabs_chevron}"),
             &mut d.glyph_cache,
         );
         for (index, (tab_x, row_y, tab_w, tab_h)) in tab_layout.tabs.iter().copied().enumerate() {
@@ -1461,7 +1465,7 @@ pub(super) fn draw_chrome(d: &mut Display) {
                 section_title_tracking,
                 TXT_DIM,
                 section_title_flags,
-                &format!("{}  {hosts_chevron}", language.pick("SSH 主机", "SSH HOSTS")),
+                &format!("SSH HOSTS  {hosts_chevron}"),
                 &mut d.glyph_cache,
             );
             // Empty state: the section stays visible with a hint teaching the

nebula_app/src/display/mod.rs

@@ -1385,6 +1385,7 @@ pub struct Display {
     /// window is following the operating system.
     nebula_window_theme_override: Option<WinitTheme>,
     pub nebula_settings_open: bool,
+    pub nebula_special_tab_active: bool,
     nebula_language_preference: LanguagePreference,
     nebula_language: UiLanguage,
     /// Paths from the last successful app configuration generation.
@@ -1807,6 +1808,7 @@ impl Display {
             nebula_system_theme,
             nebula_window_theme_override,
             nebula_settings_open: false,
+            nebula_special_tab_active: false,
             nebula_language_preference: settings_init.language,
             nebula_language: settings_init.language.resolved(),
             nebula_config_paths: config.config_paths.clone(),
@@ -2822,6 +2824,7 @@ impl Display {
             return;
         }
         self.nebula_settings_open = active;
+        self.nebula_special_tab_active = active;
         if !active {
             self.nebula_shell_picker_open = false;
             self.nebula_font_picker_open = false;
@@ -2833,6 +2836,13 @@ impl Display {
         self.pending_update.dirty = true;
     }
 
+    pub fn set_special_tab_active(&mut self, active: bool) {
+        self.nebula_special_tab_active = active;
+        if !active {
+            self.nebula_settings_open = false;
+        }
+    }
+
     pub fn set_ui_language(&mut self, preference: LanguagePreference) {
         if self.nebula_language_preference == preference {
             return;

nebula_app/src/display/settings.rs

@@ -835,17 +835,6 @@ pub(super) fn push_quads(
     // The page is flush with the active tab card. No veil, drop shadow or
     // second window outline: depth belongs to the app shell, not this page.
     quads.push(UiQuad::solid(px, py, pw, ph, s(12.0), sk.panel));
-    quads.push(UiQuad::solid(
-        px + s(12.0),
-        py,
-        pw - s(24.0),
-        s(1.0),
-        0.0,
-        // Top bevel: a subtle white lift on dark themes; on light panels a
-        // faint dark line reads as the lit edge instead.
-        if sk.is_light { Rgba::new(0, 0, 0, 24) } else { Rgba::new(255, 255, 255, 20) },
-    ));
-
     let (side_x, side_y, side_w, side_h) = geometry.sidebar;
 
     // Sidebar: no fill of its own — just a hairline separator on its right

nebula_app/src/input/mod.rs

@@ -692,6 +692,15 @@ impl<T: EventListener, A: ActionContext<T>> Processor<T, A> {
         } else {
             crate::display::ChromeHit::None
         };
+        let chrome_hover = if self.ctx.display().nebula_special_tab_active
+            && matches!(
+                chrome_hover,
+                crate::display::ChromeHit::PanelFiles | crate::display::ChromeHit::PanelGit
+            ) {
+            crate::display::ChromeHit::None
+        } else {
+            chrome_hover
+        };
         self.ctx.display().set_chrome_hover(chrome_hover, settings_hover);
 
         // Resize cursor on the window border, arrow over the title bar/sidebar,
@@ -1722,6 +1731,14 @@ impl<T: EventListener, A: ActionContext<T>> Processor<T, A> {
                     crate::display::SettingsHit::None => {},
                 }
                 let chrome_hit = self.ctx.display().chrome_hit(x, y);
+                if self.ctx.display().nebula_special_tab_active
+                    && matches!(
+                        chrome_hit,
+                        crate::display::ChromeHit::PanelFiles | crate::display::ChromeHit::PanelGit
+                    )
+                {
+                    return;
+                }
                 // Multi-click state was advanced once at the top of this
                 // function; read it for the tab double-click rename below.
                 let state = self.ctx.mouse().click_state;

nebula_app/src/window_context.rs

@@ -1640,6 +1640,8 @@ impl WindowContext {
         }
         self.active_tab = index;
         self.tabs[index].has_bell = false;
+        self.display
+            .set_special_tab_active(self.tabs[index].doc.is_some() || self.tabs[index].settings);
         self.display.set_settings_tab_active(self.tabs[index].settings);
         self.zoom = None;
         self.resize_active_layout();
@@ -1700,6 +1702,9 @@ impl WindowContext {
         } else if self.active_tab >= self.tabs.len() {
             self.active_tab = self.tabs.len() - 1;
         }
+        let special =
+            self.tabs.get(self.active_tab).is_some_and(|tab| tab.doc.is_some() || tab.settings);
+        self.display.set_special_tab_active(special);
         self.display.set_settings_tab_active(
             self.tabs.get(self.active_tab).is_some_and(|tab| tab.settings),
         );
@@ -1987,6 +1992,9 @@ impl WindowContext {
     }
 
     fn sync_chrome_tabs(&mut self) {
+        let special =
+            self.tabs.get(self.active_tab).is_some_and(|tab| tab.doc.is_some() || tab.settings);
+        self.display.set_special_tab_active(special);
         self.display.set_settings_tab_active(
             self.tabs.get(self.active_tab).is_some_and(|tab| tab.settings),
         );