GeezerVison

Scope / provenance

• Based on unchanged main SHA 561bf69a5cceee76d66b46350decea1e7da7593d, published v1.4.1.
• Isolated v1.4.2 hotfix candidate; v1.4.1 tag and release artifacts remain untouched.
• Operator screenshots/handoff: single-click GOOSE publisher selection releases under snapshots; DataSet Inspector flickers/empties, timeline/publisher mix historical/live state.

Code-level root cause addressed

• Snapshot producer returns new cloned GooseMessageItem objects each snapshot; WPF ListView was bound to fully replaced IReadOnlyList and SelectedItem to a short-lived object. View recreation/null feedback could clear selection.
• Timeline selected-item setter also wrote publisher selection and unconditional collection-view Refresh() reset the DataGrid.
• Inspector network metadata came from a timeline event while DataSet values came from a different live publisher frame.
• Raw analyzer originally indexed publishers by GoCbRef alone; multiple physical publishers with the same control-block reference could coalesce.

Implementation

• Stable GoosePublisherKey: source MAC + APPID + VLAN + exact GoCBRef (fallback GoID/DataSet only if no GoCBRef); excludes stNum/sqNum/last-seen.
• Bounded keyed incremental ObservableCollection<GoosePublisherRow> with persistent row instances and change-specific property notifications.
• Selected publisher key is the single source for its latest frame; WPF transient null is not an operator Clear.
• Publisher click chooses Live latest coherent snapshot. Timeline click explicitly pins historical event. Timeline events are not allowed to mutate publisher selection; pure collection additions do not force view resets.
• STALE state holds selected publisher's last decoded typed DataSet; explicit Clear removes selection. Filter options only change when available identities change.
• Engine's raw GOOSE state key now separates same GoCBRef from distinct source MACs.
• Regression: 1000 retransmissions without row recreation; same GoID multi-source/VLAN; alternating traffic; temporary disappearance/recovery; state-number changes; explicit Clear; bounded 500-source churn; raw same-GoCb distinct-MAC test.
• No changes to 8-DIP layout, SV phasor, waveforms or PTP path.

Verification matrix

Automated: Windows CI, Runtime Stability, Runtime Architecture, CodeQL, candidate Windows/Inno install + repair, repository health at exact PR HEAD SHA. Runs are required before approval; a green CI does not constitute mouse-click proof.

Manual Windows acceptance still required: sustained real GOOSE stream, single click at 100%, 125%, 150% DPI; retransmissions OFF/ON; multiple publishers; changes of filter/search; select timeline then publisher; STALE/recovery; matching/missing SCL. Verify About BuildInfo exact commit and installed executable hash against candidate manifest.

CI efficiency

One focused PR branch (no redundant branch builds), version reserved pre-PR so the Inno package gate won't fail on the already-published v1.4.1. Normal concurrency cancellation handles superseded SHA builds; rerun only failed jobs after code changes. No release tagging or auto-merge.

Do not merge/release as validated until workflows are green and field selection acceptance is recorded.