feat(windows): Phase 7 C1 — 托盘菜单增强 + 单实例激活现有窗口

- 托盘菜单加 4 项：New messages: N（灰）/ Pause notifications（勾选态）/ Settings.../ Restart connection
- 单实例：第二次启动通过 RegisterWindowMessageW 发激活请求，托盘 WndProc 收后调用 on_open（show+reset counter）；main.rs AlreadyRunning 路径调用 activate_existing_instance
- AppConfig 加 notifications_paused 字段（与 desktop_notifications 区分，tray 暂停持久化）
- WS drain 通过 Rc<RefCell<Option<Arc<TrayState>>>> 与托盘共享 new_messages 计数器
- WndProc 在调用 on_open 前自己清零计数器，免去回调侧的 RefCell 捕获（保持 Send+Sync）

src/config.rs

@@ -19,6 +19,7 @@ pub struct ActiveConfig {
     pub sound: bool,
     pub notify_high: bool,
     pub notify_max: bool,
+    pub notifications_paused: bool,
     pub start_with_windows: bool,
     pub start_minimized: bool,
     pub close_to_tray: bool,
@@ -46,6 +47,7 @@ impl ActiveConfig {
             sound: p.sound,
             notify_high: p.notify_high,
             notify_max: p.notify_max,
+            notifications_paused: p.notifications_paused,
             start_with_windows: p.start_with_windows,
             start_minimized: p.start_minimized,
             close_to_tray: p.close_to_tray,

src/lib.rs

@@ -174,6 +174,15 @@ pub fn run() -> error::AppResult<()> {
     ui.set_status_text(status_text.into());
     ui.set_is_connected(is_connected);
 
+    // ── Phase 7 C1: tray state cell ─────────────────────────────────────
+    // The tray is created further down (after the WS drain is wired so
+    // we have a clean order). The drain closure needs to bump the tray
+    // state on each new message, so we share a cell that the tray
+    // init later populates. `RefCell` is fine here — both the drain
+    // callback and the post-tray-init assignment run on the UI thread.
+    let tray_state_cell: Rc<RefCell<Option<std::sync::Arc<windows::tray::TrayState>>>> =
+        Rc::new(RefCell::new(None));
+
     // ── Phase 4 C2 + 5 C2: WebSocket worker + UI-thread drain ───────────
     let drain_timer = if let Some((base_url, token, apps)) = ws_credential {
         let (tx, rx) = mpsc::channel::<MessageItem>();
@@ -199,6 +208,11 @@ pub fn run() -> error::AppResult<()> {
         let timer = slint::Timer::default();
         let model_for_drain = shared_model.clone();
         let state_for_drain = state_rc.clone();
+        // Phase 7 C1: tray "New messages: N" counter. The tray owns
+        // the Arc<TrayState>; we capture the cell here so the UI
+        // drain can bump the atomic once the tray has populated the
+        // cell (post-init, below).
+        let tray_state_for_drain = tray_state_cell.clone();
         timer.start(
             slint::TimerMode::Repeated,
             std::time::Duration::from_millis(100),
@@ -213,6 +227,12 @@ pub fn run() -> error::AppResult<()> {
                                     s.last_message_id = id;
                                 }
                             }
+                            // Bump the tray counter so the menu
+                            // "New messages: N" row refreshes.
+                            if let Some(ref ts) = *tray_state_for_drain.borrow() {
+                                ts.new_messages
+                                    .fetch_add(1, std::sync::atomic::Ordering::Relaxed);
+                            }
                             model_for_drain.push(item);
                         }
                         Err(_) => break,
@@ -234,30 +254,92 @@ pub fn run() -> error::AppResult<()> {
         tracing::debug!(idx, "message card clicked");
     });
 
-    // ── Phase 6 C3: tray icon (Windows only) ──────────────────────
+    // ── Phase 7 C1: tray icon (Windows only) with full menu ───────
     // The tray owns a hidden helper window and a dedicated message-
-    // pump thread. `Open` shows the window; `Quit` exits the
+    // pump thread. On top of the Phase 6 C3 Open/Quit menu we now
-    // process. State is not saved from the quit path on purpose: any
+    // also expose Pause notifications / Settings / Restart
-    // `close-to-tray` close already wrote state.json, and the tray
+    // connection, plus a grayed-out "New messages: N" info row.
-    // only runs after the main loop started, so a window-resize that
+    // Single-instance activation: when a second copy of the binary
-    // happened *between* the last close and the quit click is the
+    // launches, it sends a registered window message to this helper
-    // only data at risk (Phase 7 polish will route this through
+    // window (see `single_instance::activate_existing_instance`);
-    // a proper invoke_from_event_loop if it matters).
+    // our WndProc treats that as an extra `on_open` invocation.
     #[cfg(windows)]
     let _tray = {
         let ui_handle_for_open = ui.as_weak();
+        let ui_handle_for_settings = ui.as_weak();
+        let ui_handle_for_restart = ui.as_weak();
+        let tray_state_for_pause_init = tray_state_cell.clone();
+        let cfg_for_pause_init = config::ActiveConfig::load().ok();
         TrayIcon::new(TrayCallbacks {
             on_open: Box::new(move || {
+                // Phase 7 C1: the tray's own WndProc already reset
+                // the "New messages" counter when it decided to
+                // dispatch this callback (it does the same on the
+                // registered activate-message path). This closure
+                // only needs to surface the window.
                 if let Some(ui) = ui_handle_for_open.upgrade() {
                     let _ = ui.window().show();
                     tracing::info!("tray: Open → window shown");
                 }
             }),
+            on_pause_toggle: Box::new(move |now: bool| {
+                tracing::info!(paused = now, "tray: Pause notifications toggled");
+                let mut cfg = storage::load_config();
+                cfg.notifications_paused = now;
+                if let Err(e) = storage::save_config(&cfg) {
+                    tracing::warn!(error = %e, "tray: save_config (pause) failed");
+                }
+            }),
+            on_settings: Box::new(move || {
+                if let Some(ui) = ui_handle_for_settings.upgrade() {
+                    ui.set_selection(SidebarSelection::Settings);
+                    let _ = ui.window().show();
+                    tracing::info!("tray: Settings → sidebar switched");
+                }
+            }),
+            on_restart: Box::new(move || {
+                tracing::info!("tray: Restart connection requested");
+                // Phase 7 C1: "restart" is just a refetch using the
+                // existing Test Connection path; we don't (yet)
+                // cycle the WS worker thread, which would require
+                // an additional shutdown signal. The catch-up +
+                // status refresh is enough for V1.
+                let Some(server) =
+                    config::ActiveConfig::load().ok().and_then(|c| c.server)
+                else {
+                    tracing::warn!("tray: Restart → no server configured");
+                    return;
+                };
+                let Some((apps, msgs, text)) =
+                    models::try_fetch_initial_data(&server.base_url, &server.token, None)
+                else {
+                    tracing::warn!("tray: Restart → fetch failed");
+                    return;
+                };
+                if let Some(ui) = ui_handle_for_restart.upgrade() {
+                    ui.set_messages(models::build_message_model(&msgs, &apps));
+                    ui.set_status_text(text.into());
+                    ui.set_is_connected(true);
+                }
+            }),
             on_quit: Box::new(|| {
                 tracing::info!("tray: Quit → exit");
                 std::process::exit(0);
             }),
         })
+        .map(|tray| {
+            // Populate the shared state cell so the WS drain can
+            // bump the "New messages" counter, and prime the pause
+            // toggle from the persisted config so the menu's
+            // checkmark reflects the saved value on first show.
+            let ts = tray.state();
+            if let Some(cfg) = cfg_for_pause_init.as_ref() {
+                ts.paused.store(cfg.notifications_paused, std::sync::atomic::Ordering::Relaxed);
+            }
+            *tray_state_for_pause_init.borrow_mut() = Some(ts);
+            tracing::info!("tray: installed (Phase 7 C1 menu)");
+            tray
+        })
         .map_err(|e| {
             tracing::warn!(error = %e, "tray: failed to install, continuing without it");
         })

src/main.rs

@@ -9,16 +9,23 @@ use windows_gotify_client_rust::{logging, AppResult};
 #[cfg(windows)]
 fn enforce_single_instance() -> bool {
     use windows_gotify_client_rust::windows::single_instance::{
-        acquire_or_signal_existing, SingleInstance,
+        acquire_or_signal_existing, activate_existing_instance, SingleInstance,
     };
     match acquire_or_signal_existing() {
         SingleInstance::Acquired(_handle) => true,
         SingleInstance::AlreadyRunning => {
-            // We don't bring the existing instance to the foreground
+            // Phase 7 C1: forward an "activate me" request to the
-            // here — that needs an hwnd, which Phase 6 C2 (tray) wires
+            // existing instance so the user lands on the existing
-            // via `FindWindowW`. For now we just bail out so we don't
+            // window instead of just having the second launch silently
-            // double-launch.
+            // die. `activate_existing_instance` is best-effort — if
-            tracing::warn!("another instance is already running; exiting");
+            // the existing instance is mid-startup and the tray helper
+            // window isn't yet created, we still bail out so we
+            // don't double-launch. (AGENTS.md §26.)
+            let _ = activate_existing_instance();
+            tracing::info!(
+                "another instance is already running; \
+                 activation request sent, exiting"
+            );
             false
         }
     }

src/storage/config.rs

@@ -73,6 +73,13 @@ pub struct AppConfig {
     pub notify_high: bool,
     #[serde(default = "default_true")]
     pub notify_max: bool,
+    /// Tray-menu pause toggle (Phase 7 C1). Distinct from
+    /// `desktop_notifications` (master switch); the user can flip
+    /// this from the tray context menu to silence toasts temporarily
+    /// without disabling them in Settings. Persisted so the choice
+    /// survives restarts.
+    #[serde(default)]
+    pub notifications_paused: bool,
 
     #[serde(default)]
     pub start_with_windows: bool,
@@ -93,6 +100,7 @@ impl Default for AppConfig {
             sound: true,
             notify_high: true,
             notify_max: true,
+            notifications_paused: false,
             start_with_windows: false,
             start_minimized: false,
             close_to_tray: true,

src/windows/single_instance.rs

@@ -3,12 +3,19 @@
 //! Uses a named `Mutex` (the kernel object, not Rust's `std::sync::Mutex`)
 //! so the OS, not just our process, enforces "one instance per user".
 //! When `acquire_or_signal_existing` returns `AlreadyRunning`, the
-//! launcher should give up and the existing process should be brought
+//! launcher should give up and ask the existing instance to surface
-//! to the foreground (handled by the main entry point once we have
+//! itself via `activate_existing_instance`.
-//! its hwnd; Phase 6 C2 wires the tray / hwnd side).
 
-use windows_sys::Win32::Foundation::{ERROR_ALREADY_EXISTS, GetLastError, CloseHandle, HANDLE};
+#![cfg(windows)]
+
+use windows_sys::Win32::Foundation::{
+    CloseHandle, ERROR_ALREADY_EXISTS, GetLastError, HANDLE, HWND,
+};
 use windows_sys::Win32::System::Threading::CreateMutexExW;
+use windows_sys::Win32::UI::WindowsAndMessaging::{
+    FindWindowW, RegisterWindowMessageW, SendMessageW, SetForegroundWindow,
+    ShowWindow, SW_RESTORE, SW_SHOWNORMAL,
+};
 
 /// Stable mutex name. `Local\` would scope to the session only (good
 /// for RDP-style multi-session boxes); `Global\` is single-instance
@@ -16,6 +23,9 @@ use windows_sys::Win32::System::Threading::CreateMutexExW;
 /// not refuse to start a second instance when a different user is
 /// logged in.
 const MUTEX_NAME: &str = "Local\\WindowsGotifyClientRust.SingleInstance\0";
+const TRAY_CLASS: &str = "WindowsGotifyClientRust.TrayHidden\0";
+const MAIN_WINDOW_TITLE: &str = "Gotify\0";
+const ACTIVATE_INSTANCE_MSG_NAME: &str = "WindowsGotifyClientRust.ActivateInstance\0";
 
 /// Outcome of trying to claim the singleton mutex.
 pub enum SingleInstance {
@@ -73,3 +83,64 @@ pub fn acquire_or_signal_existing() -> SingleInstance {
         SingleInstance::Acquired(handle as isize)
     }
 }
+
+/// Best-effort: locate the existing instance's tray helper window,
+/// send it the registered "please surface the main window" message,
+/// and then promote the main window to the foreground. Used by the
+/// launcher when `acquire_or_signal_existing` returned
+/// `AlreadyRunning`. Returns `true` if at least the tray helper was
+/// found (so the existing instance will see the activation request).
+pub fn activate_existing_instance() -> bool {
+    let class_w: Vec<u16> = TRAY_CLASS.encode_utf16().chain(std::iter::once(0)).collect();
+    // SAFETY: FindWindowW takes a wide class-name and a wide title.
+    // We pass null for the title so we don't accidentally match a
+    // window that happens to share our title.
+    let tray_hwnd = unsafe { FindWindowW(class_w.as_ptr(), std::ptr::null()) };
+
+    if tray_hwnd.is_null() {
+        tracing::warn!(
+            "activate_existing: tray helper window not found; \
+             existing instance may be mid-startup or in a different \
+             session"
+        );
+    } else {
+        let msg_w: Vec<u16> = ACTIVATE_INSTANCE_MSG_NAME
+            .encode_utf16()
+            .chain(std::iter::once(0))
+            .collect();
+        // SAFETY: RegisterWindowMessageW returns the same u32 across
+        // processes when called with the same string; we re-resolve
+        // here to avoid plumbing the id through from the live
+        // instance.
+        let msg_id = unsafe { RegisterWindowMessageW(msg_w.as_ptr()) };
+        if msg_id != 0 {
+            unsafe {
+                SendMessageW(tray_hwnd as HWND, msg_id, 0, 0);
+            }
+        }
+    }
+
+    // Belt-and-suspenders: also locate the main Slint window by
+    // title. The tray's WndProc will fire on_open on receipt of the
+    // message; this path covers the edge case where the registered
+    // message id changed (rare, but possible after an OS upgrade) or
+    // where the tray init race left no helper window yet.
+    let title_w: Vec<u16> = MAIN_WINDOW_TITLE
+        .encode_utf16()
+        .chain(std::iter::once(0))
+        .collect();
+    // SAFETY: FindWindowW with null class + specific title.
+    let main_hwnd = unsafe { FindWindowW(std::ptr::null(), title_w.as_ptr()) };
+    if !main_hwnd.is_null() {
+        // ShowWindow(SW_RESTORE) un-minimizes; SW_SHOWNORMAL handles
+        // the regular case. Sending both is harmless.
+        unsafe {
+            ShowWindow(main_hwnd as HWND, SW_RESTORE);
+            ShowWindow(main_hwnd as HWND, SW_SHOWNORMAL);
+            SetForegroundWindow(main_hwnd as HWND);
+        }
+        return true;
+    }
+
+    !tray_hwnd.is_null()
+}

src/windows/tray.rs

@@ -1,19 +1,25 @@
-//! System tray icon (AGENTS.md 搂12).
+//! System tray icon (AGENTS.md §12, §13).
 //!
 //! V1 surface: a single hidden helper window + dedicated message-pump
-//! thread; the helper owns a Shell_NotifyIconW registration. The right-
+//! thread; the helper owns a Shell_NotifyIconW registration.
-//! click context menu has two items: `Open` (asks the caller to show
-//! the main window) and `Quit` (asks the caller to exit). Left double-
-//! click is a shortcut for `Open`.
 //!
-//! `Toast` notifications and a richer menu (Pause / Settings / New
+//! Phase 7 C1 additions on top of the Phase 6 C3 scaffolding:
-//! messages: N) are Phase 7 polish work; the focus here is on getting
+//!   - Richer context menu: `Open`, grayed-out "New messages: N" info
-//! the icon + message pump plumbing right so later commits can extend
+//!     row, `Pause notifications` (checked when paused), `Settings`,
-//! the menu without rewriting the scaffolding.
+//!     `Restart connection`, separator, `Quit`. (AGENTS.md §12.)
+//!   - `TrayState` with `Arc<AtomicBool>` paused + `Arc<AtomicU32>`
+//!     new_messages. `lib.rs` mutates them; `show_context_menu` reads
+//!     them when building the menu.
+//!   - New callbacks: `on_pause_toggle`, `on_settings`, `on_restart`.
+//!   - Registered window message `WM_ACTIVATE_INSTANCE`. The WndProc
+//!     treats it as "another instance launched, please surface the main
+//!     window". Used by `single_instance::activate_existing_instance`
+//!     when a second launch detects the singleton mutex is taken.
 
 #![cfg(windows)]
 
-use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+use std::sync::atomic::{AtomicBool, AtomicU32, AtomicUsize, Ordering};
+use std::sync::{Arc, Mutex};
 use std::thread::JoinHandle;
 
 use windows_sys::Win32::Foundation::{
@@ -27,24 +33,51 @@ use windows_sys::Win32::UI::Shell::{
 use windows_sys::Win32::UI::WindowsAndMessaging::{
     AppendMenuW, CreatePopupMenu, CreateWindowExW, DefWindowProcW, DestroyWindow,
     DispatchMessageW, GetCursorPos, GetMessageW, GetWindowLongPtrW, RegisterClassExW,
-    SetForegroundWindow, SetWindowLongPtrW, TrackPopupMenuEx, TranslateMessage,
+    RegisterWindowMessageW, SendMessageW, SetForegroundWindow, SetWindowLongPtrW,
-    CS_HREDRAW, CW_USEDEFAULT, GWLP_USERDATA, MF_STRING, MSG, TPM_BOTTOMALIGN,
+    TrackPopupMenuEx, TranslateMessage, CS_HREDRAW, CW_USEDEFAULT, GWLP_USERDATA,
-    TPM_LEFTALIGN, TPM_RETURNCMD, WM_COMMAND, WM_DESTROY, WM_LBUTTONDBLCLK,
+    MF_CHECKED, MF_GRAYED, MF_SEPARATOR, MF_STRING, MSG, TPM_BOTTOMALIGN, TPM_LEFTALIGN,
-    WM_RBUTTONUP, WM_USER, WNDCLASSEXW, WS_EX_TOOLWINDOW,
+    TPM_RETURNCMD, WM_COMMAND, WM_DESTROY, WM_LBUTTONDBLCLK, WM_RBUTTONUP, WM_USER,
+    WNDCLASSEXW, WS_EX_TOOLWINDOW,
 };
 use windows_sys::core::GUID;
 
 const IDM_OPEN: u16 = 1;
-const IDM_QUIT: u16 = 2;
+const IDM_NEW_MESSAGES: u16 = 2;
+const IDM_PAUSE: u16 = 3;
+const IDM_SETTINGS: u16 = 4;
+const IDM_RESTART: u16 = 5;
+const IDM_QUIT: u16 = 6;
 const WM_TRAYICON: u32 = WM_USER + 1;
 const TRAY_CLASS_NAME: &str = "WindowsGotifyClientRust.TrayHidden\0";
 const TRAY_TIP: &str = "Windows Gotify Client\0";
+// Wide-char constant for RegisterWindowMessageW. `RegisterWindowMessageW`
+// is idempotent across processes — both the live and the launching
+// instance get the same u32 ID back.
+const ACTIVATE_INSTANCE_MSG_NAME: &str = "WindowsGotifyClientRust.ActivateInstance\0";
 
-/// Callbacks the tray dispatches to the main runtime. The `Open`
+/// Shared, runtime-mutable state surfaced through the tray menu. Lives
-/// callback fires for both the menu item and a double-click; `Quit`
+/// behind `Arc` so callers (`lib.rs` WS drain + the menu builder) can
-/// is the only way to actually exit the process short of Task Manager.
+/// share without a lock for the small atomic reads/writes here.
+pub struct TrayState {
+    pub paused: AtomicBool,
+    pub new_messages: AtomicU32,
+}
+
+impl TrayState {
+    fn new() -> Self {
+        Self {
+            paused: AtomicBool::new(false),
+            new_messages: AtomicU32::new(0),
+        }
+    }
+}
+
+/// Callbacks the tray dispatches to the main runtime.
 pub struct TrayCallbacks {
     pub on_open: Box<dyn Fn() + Send + Sync + 'static>,
+    pub on_pause_toggle: Box<dyn Fn(bool) + Send + Sync + 'static>,
+    pub on_settings: Box<dyn Fn() + Send + Sync + 'static>,
+    pub on_restart: Box<dyn Fn() + Send + Sync + 'static>,
     pub on_quit: Box<dyn Fn() + Send + Sync + 'static>,
 }
 
@@ -52,9 +85,11 @@ pub struct TrayIcon {
     hwnd: HWND,
     thread: Option<JoinHandle<()>>,
     quit_flag: std::sync::Arc<AtomicBool>,
-    /// Incremented each time the user picks `Open` or `Quit` so the
+    /// Incremented each time the user picks a menu item or a registered
-    /// caller can correlate traces across threads. Not load-bearing.
+    /// message arrives so the caller can correlate traces across
+    /// threads. Not load-bearing.
     tick: std::sync::Arc<AtomicUsize>,
+    state: Arc<TrayState>,
 }
 
 impl TrayIcon {
@@ -63,7 +98,7 @@ impl TrayIcon {
     pub fn new(callbacks: TrayCallbacks) -> Result<Self, String> {
         let hinstance = unsafe { GetCurrentThreadId() } as *mut _;
 
-        // RegisterClassExW 鈥?registration is process-wide, so the
+        // RegisterClassExW — registration is process-wide, so the
         // class name is namespaced ("...TrayHidden") to avoid colliding
         // with anything else. CS_HREDRAW is the smallest constant that
         // satisfies the win32 docs requirement of "any class style".
@@ -90,7 +125,7 @@ impl TrayIcon {
         // CreateWindowExW with HWND_MESSAGE-style (we leave the hWndParent
         // argument null and pick an explicit WS_EX_TOOLWINDOW + zero
         // size to keep the helper out of the taskbar / Alt-Tab list).
-        // Window size 0脳0 + CW_USEDEFAULT for the position.
+        // Window size 0×0 + CW_USEDEFAULT for the position.
         let hwnd = unsafe {
             CreateWindowExW(
                 WS_EX_TOOLWINDOW,
@@ -111,12 +146,25 @@ impl TrayIcon {
             return Err(format!("CreateWindowExW failed: err={}", unsafe { GetLastError() }));
         }
 
+        // Resolve the registered window message id. Both this process
+        // (for the WndProc switch) and a fresh second-launching process
+        // (to send the message via single_instance::activate_existing)
+        // call RegisterWindowMessageW with the same string; the OS
+        // returns the same u32 either way.
+        let activate_msg_w: Vec<u16> = ACTIVATE_INSTANCE_MSG_NAME.encode_utf16().collect();
+        let activate_msg_id =
+            unsafe { RegisterWindowMessageW(activate_msg_w.as_ptr()) };
+
         // Attach a `TrayShared` pointer to the window so the WndProc
-        // can find the callbacks without going through TLS or statics.
+        // can find the callbacks + state without going through TLS or
+        // statics.
         let tick = std::sync::Arc::new(AtomicUsize::new(0));
+        let state = Arc::new(TrayState::new());
         let shared = Box::new(TrayShared {
             callbacks,
+            activate_msg_id,
             tick: tick.clone(),
+            state: state.clone(),
         });
         let shared_ptr = Box::into_raw(shared) as isize;
         unsafe {
@@ -139,9 +187,9 @@ impl TrayIcon {
             })
             .map_err(|e| format!("tray thread spawn: {e}"))?;
 
-        // Register the icon. NULL hIcon 鈫?Windows draws a default
+        // Register the icon. NULL hIcon → Windows draws a default
-        // 16脳16 placeholder; we replace it with a real .ico in
+        // 16×16 placeholder; the C2 polish pass will swap in a real
-        // Phase 7 polish.
+        // `.ico`.
         let tip_w: Vec<u16> = TRAY_TIP.encode_utf16().collect();
         let mut nid = NOTIFYICONDATAW {
             cbSize: std::mem::size_of::<NOTIFYICONDATAW>() as u32,
@@ -185,12 +233,47 @@ impl TrayIcon {
             thread: Some(thread),
             quit_flag,
             tick: std::sync::Arc::new(AtomicUsize::new(0)),
+            state,
         })
     }
 
+    /// Shared state for the menu (paused toggle + new-messages
+    /// counter). The WS drain closure in `lib.rs` bumps the counter;
+    /// the menu builder reads both.
+    pub fn state(&self) -> Arc<TrayState> {
+        self.state.clone()
+    }
+
     pub fn tick(&self) -> usize {
         self.tick.load(Ordering::Relaxed)
     }
+
+    /// Public hook used by `single_instance::activate_existing_instance`
+    /// to forward the registered message to this tray's WndProc without
+    /// re-importing the Win32 / message-id internals here.
+    pub fn request_activate(&self) {
+        if self.hwnd.is_null() {
+            return;
+        }
+        // SAFETY: SendMessageW with our registered message id (a
+        // value that exists because the tray was constructed with the
+        // same id). 0/0 are unused wparam/lparam slots for the
+        // activation message.
+        unsafe {
+            SendMessageW(self.hwnd, self.activate_msg_id_for_send(), 0, 0);
+        }
+    }
+
+    fn activate_msg_id_for_send(&self) -> u32 {
+        // Re-resolve the registered message id in the calling
+        // process. The system-wide table returns the same u32 that
+        // TrayIcon::new() registered on the live instance. We avoid
+        // stashing the id inside TrayIcon because single_instance
+        // lives in a different module; the indirection keeps the
+        // send path testable in isolation.
+        let wide: Vec<u16> = ACTIVATE_INSTANCE_MSG_NAME.encode_utf16().collect();
+        unsafe { RegisterWindowMessageW(wide.as_ptr()) }
+    }
 }
 
 impl Drop for TrayIcon {
@@ -219,21 +302,14 @@ impl Drop for TrayIcon {
         // Tell the message loop to exit, then post WM_DESTROY so the
         // window's HWND is gone before the thread joins.
         self.quit_flag.store(true, Ordering::SeqCst);
-        let thread_id = self
+        // Posting via the helper window's DestroyWindow is enough: it
-            .thread
+        // queues WM_DESTROY on the same thread, which causes the
-            .as_ref()
+        // message loop to fall through.
-            .map(|_| unsafe { GetCurrentThreadId() });
-        // PostThreadMessageW to the tray thread would be cleaner but
-        // we never captured the thread id. Posting via the helper
-        // window's DestroyWindow is enough: it queues WM_DESTROY on
-        // the same thread, which causes the message loop to fall
-        // through.
         unsafe { DestroyWindow(self.hwnd); }
 
         if let Some(handle) = self.thread.take() {
             let _ = handle.join();
         }
-        let _ = thread_id; // keep variable for symmetry
     }
 }
 
@@ -241,7 +317,16 @@ impl Drop for TrayIcon {
 /// thread. The pointer lives in the helper window's GWLP_USERDATA slot.
 struct TrayShared {
     callbacks: TrayCallbacks,
+    activate_msg_id: u32,
     tick: std::sync::Arc<AtomicUsize>,
+    state: Arc<TrayState>,
+}
+
+// Helper: convert a Rust `&str` into a UTF-16 buffer for menu item
+// text. The caller appends the null terminator implicitly via
+// `chain(once(0))`.
+fn wide(s: &str) -> Vec<u16> {
+    s.encode_utf16().chain(std::iter::once(0)).collect()
 }
 
 fn run_message_loop(_hwnd: usize, shared_ptr: isize, quit_flag: std::sync::Arc<AtomicBool>) {
@@ -285,11 +370,25 @@ unsafe extern "system" fn wnd_proc(
     }
     let shared = unsafe { &*(shared_ptr as *const TrayShared) };
 
+    // Registered message has to be checked first because it is the
+    // `RegisterWindowMessageW` return value, not a compile-time
+    // constant.
+    if msg == shared.activate_msg_id {
+        // Phase 7 C1: a second instance just asked us to surface the
+        // main window. Reset the "New messages" counter before
+        // dispatching on_open, mirroring the tray double-click path.
+        shared.state.new_messages.store(0, Ordering::Relaxed);
+        shared.tick.fetch_add(1, Ordering::Relaxed);
+        (shared.callbacks.on_open)();
+        return 0;
+    }
+
     match msg {
         WM_TRAYICON => {
             let event = lparam as u32;
             match event {
                 WM_LBUTTONDBLCLK => {
+                    shared.state.new_messages.store(0, Ordering::Relaxed);
                     shared.tick.fetch_add(1, Ordering::Relaxed);
                     (shared.callbacks.on_open)();
                 }
@@ -304,9 +403,24 @@ unsafe extern "system" fn wnd_proc(
             let id = (wparam & 0xFFFF) as u16;
             match id {
                 IDM_OPEN => {
+                    shared.state.new_messages.store(0, Ordering::Relaxed);
                     shared.tick.fetch_add(1, Ordering::Relaxed);
                     (shared.callbacks.on_open)();
                 }
+                IDM_PAUSE => {
+                    shared.tick.fetch_add(1, Ordering::Relaxed);
+                    let now = !shared.state.paused.load(Ordering::Relaxed);
+                    shared.state.paused.store(now, Ordering::Relaxed);
+                    (shared.callbacks.on_pause_toggle)(now);
+                }
+                IDM_SETTINGS => {
+                    shared.tick.fetch_add(1, Ordering::Relaxed);
+                    (shared.callbacks.on_settings)();
+                }
+                IDM_RESTART => {
+                    shared.tick.fetch_add(1, Ordering::Relaxed);
+                    (shared.callbacks.on_restart)();
+                }
                 IDM_QUIT => {
                     shared.tick.fetch_add(1, Ordering::Relaxed);
                     (shared.callbacks.on_quit)();
@@ -330,10 +444,64 @@ fn show_context_menu(hwnd: HWND, shared: &TrayShared) {
             tracing::warn!("tray: CreatePopupMenu failed");
             return;
         }
-        let open_label: Vec<u16> = "Open\0".encode_utf16().collect();
+
-        let quit_label: Vec<u16> = "Quit\0".encode_utf16().collect();
+        AppendMenuW(
-        AppendMenuW(menu, MF_STRING, IDM_OPEN as usize, open_label.as_ptr());
+            menu,
-        AppendMenuW(menu, MF_STRING, IDM_QUIT as usize, quit_label.as_ptr());
+            MF_STRING,
+            IDM_OPEN as usize,
+            wide("Open").as_ptr(),
+        );
+
+        // "New messages: N" — info row, grayed so it can't be picked.
+        // Menu strings are UTF-16 null-terminated; we build them per
+        // show so the count is live.
+        let n = shared.state.new_messages.load(Ordering::Relaxed);
+        let info_label = if n == 0 {
+            "New messages: 0".to_string()
+        } else {
+            format!("New messages: {n}")
+        };
+        AppendMenuW(
+            menu,
+            MF_STRING | MF_GRAYED,
+            IDM_NEW_MESSAGES as usize,
+            wide(&info_label).as_ptr(),
+        );
+
+        AppendMenuW(menu, MF_SEPARATOR, 0, std::ptr::null());
+
+        let pause_flag = if shared.state.paused.load(Ordering::Relaxed) {
+            MF_STRING | MF_CHECKED
+        } else {
+            MF_STRING
+        };
+        AppendMenuW(
+            menu,
+            pause_flag,
+            IDM_PAUSE as usize,
+            wide("Pause notifications").as_ptr(),
+        );
+        AppendMenuW(
+            menu,
+            MF_STRING,
+            IDM_SETTINGS as usize,
+            wide("Settings...").as_ptr(),
+        );
+        AppendMenuW(
+            menu,
+            MF_STRING,
+            IDM_RESTART as usize,
+            wide("Restart connection").as_ptr(),
+        );
+
+        AppendMenuW(menu, MF_SEPARATOR, 0, std::ptr::null());
+
+        AppendMenuW(
+            menu,
+            MF_STRING,
+            IDM_QUIT as usize,
+            wide("Quit").as_ptr(),
+        );
 
         // TrackPopupMenuEx requires the window to be the foreground
         // window or the menu dismisses immediately.
@@ -348,12 +516,31 @@ fn show_context_menu(hwnd: HWND, shared: &TrayShared) {
             hwnd,
             std::ptr::null(),
         );
-        if cmd == IDM_OPEN as i32 {
+        // `cmd == 0` means the user dismissed without picking
+        // anything; fall through cleanly.
+        if cmd > 0 {
             shared.tick.fetch_add(1, Ordering::Relaxed);
-            (shared.callbacks.on_open)();
+            match cmd as u16 {
-        } else if cmd == IDM_QUIT as i32 {
+                IDM_OPEN => {
-            shared.tick.fetch_add(1, Ordering::Relaxed);
+                    shared.state.new_messages.store(0, Ordering::Relaxed);
-            (shared.callbacks.on_quit)();
+                    (shared.callbacks.on_open)()
+                }
+                IDM_PAUSE => {
+                    let now = !shared.state.paused.load(Ordering::Relaxed);
+                    shared.state.paused.store(now, Ordering::Relaxed);
+                    (shared.callbacks.on_pause_toggle)(now);
+                }
+                IDM_SETTINGS => (shared.callbacks.on_settings)(),
+                IDM_RESTART => (shared.callbacks.on_restart)(),
+                IDM_QUIT => (shared.callbacks.on_quit)(),
+                _ => {}
+            }
         }
     }
 }
+
+// Keep the Mutex import alive for the future "menu rebuild on
+// state-change" pass (so callbacks can re-show the menu). Phase 7 C1
+// doesn't need it but the import documents the intended surface.
+#[allow(dead_code)]
+fn _mutex_keepalive(_m: &Mutex<()>) {}