G0.3: watchdog giu 15s khi attach-in-flight (SHM flag) + RAII guard trong attach job (fix kill nham khi GUI mo)

src-tauri/src/shm.rs

@@ -59,6 +59,10 @@ pub struct SharedAudioBufferIPC {
     pub midi_queue_count: u32,
     pub control_queue: [ControlEventIPC; CONTROL_QUEUE_CAP],
     pub control_queue_count: u32,
+    // G0.3: bridge sets this while an openGUI attach job is in flight.
+    // Append-only field — offsets of control_queue (2836) and
+    // control_queue_count (11156) are unchanged.
+    pub attach_in_flight: u32,
 }
 
 pub struct Shm {
@@ -158,6 +162,10 @@ impl Shm {
     pub fn block_timestamp(&self) -> u64 {
         self.ipc().block_timestamp
     }
+
+    pub fn attach_in_flight(&self) -> bool {
+        self.ipc().attach_in_flight != 0
+    }
 }
 
 impl Drop for Shm {
@@ -180,6 +188,6 @@ mod tests {
         // native_bridge/tests/shm_selfcheck.cpp asserts the same sizes.
         assert_eq!(std::mem::size_of::<MidiEventIPC>(), 12);
         assert_eq!(std::mem::size_of::<ControlEventIPC>(), 1040);
-        assert_eq!(std::mem::size_of::<SharedAudioBufferIPC>(), 11160);
+        assert_eq!(std::mem::size_of::<SharedAudioBufferIPC>(), 11164);
     }
 }