Add taskbar monitor picker to the context menu

src/localization/dutch.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Open Antigravity en meld je opnieuw aan. Ververs of herstart de app daarna.",
     codex_window_title: "Codex-gebruiksmonitor",
     antigravity_window_title: "Antigravity-gebruiksmonitor",
+    display_on: "Weergeven op",
+    monitor: "Monitor",
+    primary: "Primair",
     second_suffix: "s",
 };

src/localization/english.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Open Antigravity and sign in again. After that, refresh or restart this app.",
     codex_window_title: "Codex Usage Monitor",
     antigravity_window_title: "Antigravity Usage Monitor",
+    display_on: "Display on",
+    monitor: "Monitor",
+    primary: "Primary",
     second_suffix: "s",
 };

src/localization/french.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Ouvrez Antigravity et reconnectez-vous. Ensuite, actualisez ou redemarrez cette application.",
     codex_window_title: "Moniteur d'utilisation Codex",
     antigravity_window_title: "Moniteur d'utilisation Antigravity",
+    display_on: "Afficher sur",
+    monitor: "Moniteur",
+    primary: "Principal",
     second_suffix: "s",
 };

src/localization/german.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Offnen Sie Antigravity und melden Sie sich erneut an. Aktualisieren oder starten Sie diese App anschliessend neu.",
     codex_window_title: "Codex-Nutzungsmonitor",
     antigravity_window_title: "Antigravity-Nutzungsmonitor",
+    display_on: "Anzeigen auf",
+    monitor: "Monitor",
+    primary: "Primär",
     second_suffix: "s",
 };

src/localization/japanese.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Antigravity を開いて再度サインインしてください。その後、このアプリを更新するか再起動してください。",
     codex_window_title: "Codex 使用量モニター",
     antigravity_window_title: "Antigravity 使用量モニター",
+    display_on: "表示するモニター",
+    monitor: "モニター",
+    primary: "プライマリ",
     second_suffix: "秒",
 };

src/localization/korean.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Antigravity를 열고 다시 로그인하세요. 그런 다음 이 앱을 새로 고치거나 다시 시작하세요.",
     codex_window_title: "Codex 사용량 모니터",
     antigravity_window_title: "Antigravity 사용량 모니터",
+    display_on: "표시할 모니터",
+    monitor: "모니터",
+    primary: "기본",
     second_suffix: "초",
 };

src/localization/mod.rs

@@ -189,6 +189,9 @@ pub struct Strings {
     pub antigravity_token_expired_body: &'static str,
     pub codex_window_title: &'static str,
     pub antigravity_window_title: &'static str,
+    pub display_on: &'static str,
+    pub monitor: &'static str,
+    pub primary: &'static str,
 }
 
 pub fn resolve_language(language_override: Option<LanguageId>) -> LanguageId {

src/localization/portuguese_brazil.rs

@@ -47,4 +47,7 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Abra o Antigravity e entre novamente. Depois disso, atualize ou reinicie este aplicativo.",
     codex_window_title: "Monitor de uso do Codex",
     antigravity_window_title: "Monitor de uso do Antigravity",
+    display_on: "Exibir em",
+    monitor: "Monitor",
+    primary: "Principal",
 };

src/localization/russian.rs

@@ -47,4 +47,7 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Откройте Antigravity и войдите снова. После этого обновите или перезапустите приложение.",
     codex_window_title: "Монитор использования Codex",
     antigravity_window_title: "Монитор использования Antigravity",
+    display_on: "Показывать на",
+    monitor: "Монитор",
+    primary: "Основной",
 };

src/localization/simplified_chinese.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "请打开 Antigravity 并重新登录。完成后，请刷新或重新启动此应用程序。",
     codex_window_title: "Codex 使用量监控",
     antigravity_window_title: "Antigravity 使用量监控",
+    display_on: "显示于",
+    monitor: "显示器",
+    primary: "主要",
     second_suffix: "秒",
 };

src/localization/spanish.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "Abre Antigravity e inicia sesion otra vez. Despues, actualiza o reinicia esta aplicacion.",
     codex_window_title: "Monitor de uso de Codex",
     antigravity_window_title: "Monitor de uso de Antigravity",
+    display_on: "Mostrar en",
+    monitor: "Monitor",
+    primary: "Principal",
     second_suffix: "s",
 };

src/localization/traditional_chinese.rs

@@ -46,5 +46,8 @@ pub(super) const STRINGS: Strings = Strings {
     antigravity_token_expired_body: "請開啟 Antigravity 並重新登入。完成後，請重新整理或重新啟動此應用程式。",
     codex_window_title: "Codex 使用量監控",
     antigravity_window_title: "Antigravity 使用量監控",
+    display_on: "顯示於",
+    monitor: "螢幕",
+    primary: "主要",
     second_suffix: "秒",
 };

src/native_interop.rs

@@ -1,5 +1,8 @@
 use windows::core::PCWSTR;
 use windows::Win32::Foundation::{BOOL, HWND, LPARAM, RECT};
+use windows::Win32::Graphics::Gdi::{
+    GetMonitorInfoW, MonitorFromRect, MONITORINFO, MONITORINFOEXW, MONITOR_DEFAULTTONEAREST,
+};
 use windows::Win32::UI::Accessibility::{SetWinEventHook, UnhookWinEvent, HWINEVENTHOOK};
 use windows::Win32::UI::Shell::{SHAppBarMessage, ABM_GETTASKBARPOS, APPBARDATA};
 use windows::Win32::UI::WindowsAndMessaging::*;
@@ -24,10 +27,47 @@ pub const WM_APP: u32 = 0x8000;
 pub const WM_APP_USAGE_UPDATED: u32 = WM_APP + 1;
 pub const WM_APP_TRAY: u32 = WM_APP + 3;
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Debug)]
 pub struct TaskbarWindow {
     pub hwnd: HWND,
     pub rect: RECT,
+    pub is_primary: bool,
+    /// Stable identity of the monitor this taskbar sits on (e.g. "\\.\DISPLAY2").
+    /// Unlike the taskbar's position in `find_taskbars()`, this does not change
+    /// when another monitor's taskbar is hidden/recreated (e.g. by fullscreen
+    /// video), so it is what we persist and re-attach against.
+    pub monitor_device: String,
+}
+
+/// Query the monitor containing `rect`: whether it is the primary display and
+/// its stable device name (`szDevice`, e.g. "\\.\DISPLAY1"). The device name is
+/// empty only if the monitor cannot be resolved.
+fn monitor_info_for_rect(rect: &RECT) -> (bool, String) {
+    unsafe {
+        let hmon = MonitorFromRect(rect as *const RECT, MONITOR_DEFAULTTONEAREST);
+        if hmon.is_invalid() {
+            return (false, String::new());
+        }
+        let mut info = MONITORINFOEXW {
+            monitorInfo: MONITORINFO {
+                cbSize: std::mem::size_of::<MONITORINFOEXW>() as u32,
+                ..Default::default()
+            },
+            ..Default::default()
+        };
+        if GetMonitorInfoW(hmon, &mut info.monitorInfo as *mut MONITORINFO).as_bool() {
+            let is_primary = (info.monitorInfo.dwFlags & MONITORINFOF_PRIMARY) != 0;
+            let len = info
+                .szDevice
+                .iter()
+                .position(|&c| c == 0)
+                .unwrap_or(info.szDevice.len());
+            let device = String::from_utf16_lossy(&info.szDevice[..len]);
+            (is_primary, device)
+        } else {
+            (false, String::new())
+        }
+    }
 }
 
 pub fn find_taskbars() -> Vec<TaskbarWindow> {
@@ -39,7 +79,13 @@ pub fn find_taskbars() -> Vec<TaskbarWindow> {
             let class_name = String::from_utf16_lossy(&class_name[..len as usize]);
             if class_name == "Shell_TrayWnd" || class_name == "Shell_SecondaryTrayWnd" {
                 if let Some(rect) = get_taskbar_rect(hwnd).or_else(|| get_window_rect_safe(hwnd)) {
-                    taskbars.push(TaskbarWindow { hwnd, rect });
+                    let (is_primary, monitor_device) = monitor_info_for_rect(&rect);
+                    taskbars.push(TaskbarWindow {
+                        hwnd,
+                        rect,
+                        is_primary,
+                        monitor_device,
+                    });
                 }
             }
         }