Please address the comments from this code review:
## Overall Comments
- Implement a Dispose/OnAfterRender cleanup in the NetworkMonitor component to call the JS ‘dispose’ method and remove event listeners when the component is destroyed.
- Add a feature‐detection guard or fallback path for browsers that don’t support navigator.connection to prevent runtime errors in unsupported environments.
- Replace the hardcoded Task.Delay in tests with a more deterministic synchronization mechanism (e.g. awaiting state changes or using event callbacks) to avoid flaky timing issues.

## Individual Comments

### Comment 1
<location> `src/BootstrapBlazor/wwwroot/modules/net.js:12` </location>
<code_context>
+            downlink, networkType: effectiveType, rTT: rtt
+        });
+    }
+    navigator.connection.onchange = e => {
+        updateState(e.target);
+    }
</code_context>

<issue_to_address>
Potential lack of feature detection for navigator.connection.

Add a check to ensure navigator.connection and its onchange property exist before using them to prevent errors in unsupported browsers.
</issue_to_address>

### Comment 2
<location> `src/BootstrapBlazor/wwwroot/modules/net.js:7` </location>
<code_context>
+export function init(id, options) {
+    const { invoke, onlineStateChangedCallback, onNetworkStateChangedCallback, indicators } = options;
+    const updateState = nt => {
+        const { downlink, effectiveType, rtt } = nt;
+        invoke.invokeMethodAsync(onNetworkStateChangedCallback, {
+            downlink, networkType: effectiveType, rTT: rtt
+        });
+    }
</code_context>

<issue_to_address>
Inconsistent property casing for 'rTT' in the object sent to .NET.

The property name should be 'RTT' to match the C# class and avoid deserialization problems.
</issue_to_address>

### Comment 3
<location> `src/BootstrapBlazor/Components/NetworkMonitor/NetworkMonitorIndicator.razor:15` </location>
<code_context>
+                <div>@_state.NetworkType</div>
+            </div>
+            <div class="bb-nt-item">
+                <span>Downlink：</span>
+                <div>@_state.Downlink M/s</div>
+            </div>
+            <div class="bb-nt-item">
</code_context>

<issue_to_address>
Unit for downlink speed may be misleading.

Update the label to 'Mbps' to accurately reflect the standard unit for downlink speed.
</issue_to_address>

<suggested_fix>
<<<<<<< SEARCH
                <span>Downlink：</span>
                <div>@_state.Downlink M/s</div>
=======
                <span>Downlink：</span>
                <div>@_state.Downlink Mbps</div>
>>>>>>> REPLACE

</suggested_fix>

### Comment 4
<location> `src/BootstrapBlazor/Components/NetworkMonitor/NetworkMonitorIndicator.razor:11` </location>
<code_context>
+    <Template>
+        <div class="bb-nt-main">
+            <div class="bb-nt-item">
+                <span>NetworkType：</span>
+                <div>@_state.NetworkType</div>
+            </div>
+            <div class="bb-nt-item">
</code_context>

<issue_to_address>
Hardcoded labels may not be localized.

Consider replacing the hardcoded labels with the existing localized strings from the code-behind to support localization.

Suggested implementation:

```
                <span>@NetworkTypeText：</span>

```

```
                <span>@DownlinkText：</span>

```

```
                <span>@RTTText：</span>

```

Make sure that `NetworkTypeText`, `DownlinkText`, and `RTTText` are defined as localized string properties in the code-behind file (NetworkMonitorIndicator.razor.cs or @code block), and that they retrieve the appropriate localized values.
</issue_to_address>

### Comment 5
<location> `test/UnitTest/Components/NetworkMonitorIndicatorTest.cs:19` </location>
<code_context>
+        });
+
+        var com = cut.FindComponent<NetworkMonitor>();
+        await cut.InvokeAsync(() => com.Instance.TriggerNetworkStateChanged(new NetworkMonitorState
+        {
+            IsOnline = false,
+            NetworkType = "4g",
+            Downlink = 10.0,
+            RTT = 50
+        }));
+        Assert.DoesNotContain("offline", cut.Markup);
+
+        await cut.InvokeAsync(() => com.Instance.TriggerOnlineStateChanged(true));
</code_context>

<issue_to_address>
Missing test for the 'offline' class when the network is offline.

Please add a test to check that the 'offline' class appears in the markup when the network is offline, to ensure the UI updates correctly.
</issue_to_address>

<suggested_fix>
<<<<<<< SEARCH
        await cut.InvokeAsync(() => com.Instance.TriggerNetworkStateChanged(new NetworkMonitorState
        {
            IsOnline = false,
            NetworkType = "4g",
            Downlink = 10.0,
            RTT = 50
        }));
        Assert.DoesNotContain("offline", cut.Markup);

        await cut.InvokeAsync(() => com.Instance.TriggerOnlineStateChanged(true));
        Assert.DoesNotContain("offline", cut.Markup);
=======
        await cut.InvokeAsync(() => com.Instance.TriggerNetworkStateChanged(new NetworkMonitorState
        {
            IsOnline = false,
            NetworkType = "4g",
            Downlink = 10.0,
            RTT = 50
        }));
        Assert.Contains("offline", cut.Markup);

        await cut.InvokeAsync(() => com.Instance.TriggerOnlineStateChanged(true));
        Assert.DoesNotContain("offline", cut.Markup);
>>>>>>> REPLACE

</suggested_fix>

### Comment 6
<location> `test/UnitTest/Components/NetworkMonitorIndicatorTest.cs:45` </location>
<code_context>
+            });
+        });
+
+        await cut.InvokeAsync(() => cut.Instance.TriggerOnlineStateChanged(false));
+        Assert.NotNull(state);
+        Assert.False(state.IsOnline);
+    }
+}
</code_context>

<issue_to_address>
Missing test for TriggerNetworkStateChanged with various NetworkMonitorState values.

Please add tests covering different NetworkMonitorState property combinations to verify correct callback and state updates across all scenarios.
</issue_to_address>

<suggested_fix>
<<<<<<< SEARCH
    }
+}
=======
    }

    [Theory]
    [InlineData(true, true)]
    [InlineData(true, false)]
    [InlineData(false, true)]
    [InlineData(false, false)]
    public async Task NetworkMonitor_TriggerNetworkStateChanged_UpdatesStateCorrectly(bool isOnline, bool isConnectionExpensive)
    {
        NetworkMonitorState? callbackState = null;
        var cut = Context.RenderComponent<NetworkMonitor>(pb =>
        {
            pb.Add(a => a.OnNetworkStateChanged, v =>
            {
                callbackState = v;
                return Task.CompletedTask;
            });
        });

        var testState = new NetworkMonitorState
        {
            IsOnline = isOnline,
            IsConnectionExpensive = isConnectionExpensive
        };

        await cut.InvokeAsync(() => cut.Instance.TriggerNetworkStateChanged(testState));

        Assert.NotNull(callbackState);
        Assert.Equal(isOnline, callbackState!.IsOnline);
        Assert.Equal(isConnectionExpensive, callbackState.IsConnectionExpensive);
    }
}
>>>>>>> REPLACE

</suggested_fix>