P7.6F integration: canonical F650 commands + nonmodal evidence-based reject shout

[masarray]

Integration CI / test handoff — exact HEAD 2026-10-09

• Exact HEAD 3c6ccc84a9fe97ae6e87262cdfd969abefedf497, base #489 0a47560f478437e50b399f0deba7b33dc2cedbd7.
• 11/11 triggered GitHub Actions workflows SUCCESS. Merge Execution Guard: 1,435 ARSAS regression tests passed, 0 failed, 0 skipped (combined canonical model/atomic single-flight/rejection visibility).
• Native Windows x64 Build ARSAS SUCCESS; portable single-EXE artifact.
• Smart Discovery Field Capture Build SUCCESS; Windows x64 portable field-capture artifact.
• SCL Interoperability R7 Build SUCCESS; IEC 61850 Interoperability Reference Guard and Mainline Readiness also green.
• CI thrift: 5 changed/new files in one atomic source commit and one triggered CI batch. No manual workflows and no staleness reruns.
• CodeCommitted/CIPassed/ArtifactsAvailable: YES. Physical F650 screenshot verification and controlled Local→Remote rejection behavior: PENDING. Do not operate energized breakers to prove error paths; use safe test setup. Draft only, not merge-ready, not merged, not publicly released.
• Important: P7.6F integration: canonical F650 commands + nonmodal evidence-based reject shout #491 is stacked on G1/F650 #446: canonical IEC 61850 command targets + evidence-graded reject reasons #489 and reconciles sibling P7.6F #446: canonical CSWI commands and evidence-based rejection shout #490 visual shout; merging sibling P7.6F #446: canonical CSWI commands and evidence-based rejection shout #490 separately over this result risks reintroducing competing UI-only dedup/counter logic. Keep UX UX: legible, compact IED Actions and Add IEC 61850 IED dialogs #486 and causal report P7.6E #446: correlate engine RptEna/GI activation with report inclusion reasons #488 tracked as separate workstreams.

Reconcile two green sibling workstreams without losing progress

#489 implements canonical IEC 61850 DataObject command identity, source-level DataSet alias resolution, shared per-target ctlModel inspection, atomic per-target MMS dispatch guard, and evidence-graded LastApplError/AddCause classification. Independent #490 added a visible non-modal command rejection notification. Both originated from the same P7.6E HEAD, and cannot be treated as cumulative. This stacked draft builds on #489 and carries only the UI shout from #490, without duplicating its alternative DataSet/grouping logic.

• Replace G1/F650 #446: canonical IEC 61850 command targets + evidence-graded reject reasons #489 blocking command failure MessageBox with non-modal, bounded high-contrast CommandShout overlay and one reusable DispatcherTimer (8s); failed results still persist on the specific command row, status bar, and Diagnostics.
• Pure Iec61850ControlShout uses exactly G1/F650 #446: canonical IEC 61850 command targets + evidence-graded reject reasons #489's Iec61850ControlFailureReason.Explain. Generic MMS object-access-denied => cause not supplied, Local/Remote/auth/interlock only checks; explicit AddCause => evidence-grade reason; client NotSent is distinguished from IED reject.
• Retain entire G1/F650 #446: canonical IEC 61850 command targets + evidence-graded reject reasons #489 canonical command identity, per-IED/per-object atomic single-flight, model projection and control decoder untouched.
• Update obsolete modal-only regression contract and add integration cases: F650 generic access denial, explicit interlocking/synchrocheck/mode/access, NotSent, nonblocking Dispatcher, bounded text, singleflight source protection.

Exactly five files in one prepared Git tree, one commit 3c6ccc84a9fe97ae6e87262cdfd969abefedf497; no network engine, GI, RCB/reporting, polling, SCL or control writes changed. UX dialog #486 and causal report #488 remain independent. Coordination: do not merge sibling #490 on top blindly; review this integration for reconciliation. Strictly DRAFT until exact SHA CI, native Windows artifact and GE F650 safe bench/UI field screenshot. Operator's previously known Local mode is not on-wire proof of that cause. Do not issue physical breaker commands.