Add event-latched Alarm Annunciator workspace

[masarray]

Field UX cleanup

The three top-right runtime count chips duplicated the bottom status bar (connected/discovered, monitoring/values, events). They consumed scarce header width and added visual noise without providing unique operational information.

This PR removes those header chips and keeps the bottom status bar as the single runtime-summary surface.

Alarm Annunciator

Adds a dedicated substation-style Alarm Annunciator workflow between Event Log and GOOSE Subscriber.

Operator configuration

• IEC 61850 Explorer live values gain a narrow Alarm checkbox column.
• Selection is deliberately restricted to FC=ST status points; analog/command points are not accidentally treated as alarm contacts.
• Annunciator selection is persisted separately in ARSAS project profiles and restored on project load.

Event/SOE authority

The annunciator does not create a second IEC 61850 acquisition path. It subscribes to the same authoritative runtime EventRaised stream that feeds Event Log/SOE and only latches explicitly configured points.

HMI alarm sequence

• Active edge / short relay pulse -> ALARM · UNACK, flashing red lamp/window.
• If the pulse returns before acknowledgement -> RTN · UNACK, still flashing/latched so the operator cannot miss a momentary protection indication.
• ACK while condition is still active -> ALARM · ACK, flashing stops but the window remains steadily active.
• Active acknowledged condition returning normal -> clears automatically.
• Returned-unacknowledged pulse -> ACK clears it to normal.
• Per-window ACK and global ACK ALL are provided.
• Tiles stay in stable configuration order instead of re-sorting during alarm changes, preserving operator muscle memory.

The red/orange/amber palette is scoped only to alarm semantics; generic IEC process True/False value badges remain the non-severity blue/slate scheme introduced earlier.

Navigation / visual design

• Workflow navigation expands from 5 to 6 cells and gains Alarm Annunciator.
• Responsive pill geometry now derives from six real cells.
• Freed header space is reused for the wider workflow navigation instead of more status decoration.
• Alarm workspace uses compact premium tiles with state lamp, IED/signal identity, last SOE timestamp, current value, occurrence count and explicit acknowledgement controls.

Regression coverage

• Momentary pulse latches through return-to-normal until ACK.
• ACK stops flash but does not hide an active condition.
• Inactive events do not invent alarms.
• Explicitly selected abnormal DPC states latch as operator alarms.
• Explorer annunciator selection is FC=ST only.
• Project persistence keeps annunciator references separate from normal live selection.
• Source integration guard proves annunciator consumes EventRaised and does not call value reads/start monitoring.
• Six-tab navigation, header chip removal, Alarm checkbox, ACK controls and bottom status-bar authority are locked by regression tests.

Final diff contains only production source/XAML and regression tests; temporary patch tooling was removed before PR creation.

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