Implement SMB 3.x Lease support Phase 5

- WRITE handler trigger lease break (READ leases conflict with WRITE)
- READ handler trigger lease break (HANDLE leases may conflict)
- Send LeaseBreakNotification via notification channel

All 229 tests pass.

vendor/smb-server/src/handlers/read.rs

@@ -59,6 +59,24 @@ pub async fn handle(
         }
     }
     
+    // Phase 5: Trigger lease break if lease exists (SMB 3.x)
+    // READ operation doesn't break WRITE leases (only WRITE/HANDLE operations do)
+    // But we still check for HANDLE lease conflicts
+    let lease_notifications = server.lease_manager.break_lease(
+        crate::oplock::SMB2_LEASE_HANDLE, // READ operation may break HANDLE leases
+    ).await;
+    
+    for lease_notification in lease_notifications {
+        use crate::proto::framing::encode_frame;
+        let notification_bytes = lease_notification.write_to_bytes();
+        let mut frame = Vec::with_capacity(notification_bytes.len() + 4);
+        encode_frame(&notification_bytes, &mut frame);
+        
+        if let Some(tx) = conn.notification_tx.read().await.as_ref() {
+            let _ = tx.send(frame).await;
+        }
+    }
+    
     let result = {
         let open = open_arc.read().await;
         match open.handle.as_ref() {

vendor/smb-server/src/handlers/write.rs

@@ -75,6 +75,22 @@ pub async fn handle(
         }
     }
     
+    // Phase 5: Trigger lease break if lease exists (SMB 3.x)
+    let lease_notifications = server.lease_manager.break_lease(
+        crate::oplock::SMB2_LEASE_READ, // WRITE operation breaks READ leases
+    ).await;
+    
+    for lease_notification in lease_notifications {
+        use crate::proto::framing::encode_frame;
+        let notification_bytes = lease_notification.write_to_bytes();
+        let mut frame = Vec::with_capacity(notification_bytes.len() + 4);
+        encode_frame(&notification_bytes, &mut frame);
+        
+        if let Some(tx) = conn.notification_tx.read().await.as_ref() {
+            let _ = tx.send(frame).await;
+        }
+    }
+    
     let result = {
         let open = open_arc.read().await;
         match open.handle.as_ref() {