Network Health: Errors/Loss chart legend shows two unlabeled "Avg" values — can't tell what each line is.

[kateatlinksys]

Reproduce steps:

1. Login to Linksys Now.
2. Go to Dashboard > Network Health.
3. Open the Errors tab (same applies to the Loss tab).

Actual result:
The chart legend shows two "Avg" values in different colors (e.g. red "Avg: 0/s Peak: 0/s" and orange "Avg: 0.03/s") but neither line is named — there is no series label saying what each line represents. The user can't tell which line is which. Other tabs on the same card and the System Status card do label their series (CPU, Traffic rate, Memory), so this is inconsistent within the product.

Expected result:
Each line in the legend should have a series name (e.g. "Errors" / "Discards"), consistent with the labeled charts elsewhere, so the two Avg values are distinguishable.

Env.: M60DU-EU / Pinnacle 2.0 FW 1.2.2.26062820 / Linksys Now 2.5.0.700525

Log
GUI_networkhealth_avgux_0716.txt

Screenshot

[AustinChangLinksys]

🔍 Automated investigation (preliminary triage)

Line: 2.x / USP (TR-369)

Root cause:

• UI defect: The Errors and Loss tab legends render only colored dots plus the numeric Avg/Peak strings — the per-series names ("Errors" / "Discards") are never drawn in the custom legend, even though those labels already exist on the underlying chart series. Result: two Avg: values in different colors with no series name, so users can't tell which line is which.

Evidence (from source + attached log.txt):

1. The Errors tab data lines (WAN error rate + discard rate) are pulled correctly over USP — confirmed in the attached log, which repeatedly requests Device.IP.Interface.*.Stats.ErrorsSent/ErrorsReceived/DiscardPacketsSent/DiscardPacketsReceived:

Dispatch (active=1, queue=0): usp:Device.IP.Interface.2.Stats.ErrorsSent,
Device.IP.Interface.2.Stats.ErrorsReceived,Device.IP.Interface.2.Stats.DiscardPacketsSent,
Device.IP.Interface.2.Stats.DiscardPacketsReceived,...

No backend error/failure appears in the log for these stats — the data arrives fine, so this is purely a presentation issue (a labeling defect structurally has no error response).

2. The chart series ARE given names (lib/page/dashboard/views/components/usp_network_health_card.dart, Errors chart), so the information exists at the data layer:

AppChartSeries(label: loc(parentContext).errors,   data: errorData, ...)   // L287
AppChartSeries(label: loc(parentContext).discards, data: discardData, ...) // L293

And the loc strings resolve to real names (lib/l10n/app_en.arb): "errors": "Errors", "discards": "Discards".

3. But the custom legend Row below the chart only emits colored dots + the numeric value strings, dropping the series names (same file, L305–324):

_LegendDot(color: colorScheme.error),
AppText.labelSmall(loc(parentContext).avgValuePeakValue(... avgErr, peakErr ...)),  // "Avg: X  Peak: Y"
_LegendDot(color: Colors.orange),
AppText.labelSmall(loc(parentContext).avgValue(... avgDisc ...)),                    // "Avg: Z"

With "avgValuePeakValue": "Avg: {avg} Peak: {peak}" and "avgValue": "Avg: {value}" — hence two unlabeled Avg: entries. The Loss tab legend (L381–388) has the same shape (one unnamed Avg/Peak entry). Fix is UI-only: prepend each legend entry with its series name (Errors / Discards / Loss), consistent with the labeled charts elsewhere on the card.

Confidence: High — UI defect located by reading source (series names exist but are omitted from the custom legend); attached log confirms data path is healthy with no backend error.

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Auto-generated triage by Austin's tooling, pending Austin's review. Not a fix commitment.