Fix actual WPF panel geometry (8-DIP gutters and footer alignment), SV freshness and Inno installer

[masarray]

Latest addition: real per-channel SV freshness

• Full stream STALE: the waveform control binds SelectedStream.IsActive and mutes all voltage/current traces and legends, retaining the last valid oscilloscope evidence (same visual semantics as phasors). Prominent STALE · last valid samples lane header.
• Partial 4I+4V quality fault: only the channel whose verified instMag/q word indicates invalid/old/untrusted data is withheld. Its previous coherent waveform/phasor/RMS is shown as HELD at 38% opacity; if no prior valid samples exist it becomes MISSING. Five healthy phases remain normal. The stream becomes amber LIVE · WARN, not green.
• A channel is not switched to LIVE on the first good ASDU: it needs a full new coherent window. Zero-amplitude valid data remains LIVE; never infer stale from a flat waveform.
• All consumers share ChannelFreshness in the selected-stream analyzer SSOT: waveform, phasor, measurement rows, immutable runtime snapshot and power readout. Three-phase power returns N/A if any required channel is HELD/MISSING; held data is not claimed as a current measurement.
• Same raw decoding and aligned smpCnt window, no additional background timer, packet worker, or channel packet cache. Presentation uses per-trace opacity and existing frozen pens.
• Respect SCL channel-to-element mapping for quality bits when channel ordering differs, and fail conservatively for unverified layouts. Unsupported arbitrary layouts do not get guessed channel freshness.
• Fix an initial quality-window off-by-one regression discovered by CI: exact 2/4/8-cycle PCAP replay remains valid. Test covers one bad Ic, five healthy peers, recovery, missing-quality semantics and valid zero.

Previously implemented in this PR

• Phasor exact-tip callouts for co-linear U/I, stable label collision avoidance, snapshot-driven U/I scaling, and source-relative electrical angles.
• Npcap trusted native DLL selection; no fabricated fallback Ethernet NIC.
• Safe Windows Inno Setup installer with in-place repair and local PDF manuals regenerated from Markdown with SHA256 provenance.
• Public release remains manually gated on main and documented physical target-NIC/long-running injector field acceptance. No auto-merge or automatic stable release.

Validation

Current head automated Windows CI, Runtime Architecture, Runtime Stability, candidate package and CodeQL are the gate. Physical single-channel quality inject test on the target PC and the full 60-minute bench are still pending.

WPF visible-spacing correction — follow-up to physical screenshots (2026-10-20)

The first styling pass was insufficient: it standardized padding, but retained a visibly oversized 16-DIP gap between the 280-DIP explorer, central canvas and 320-DIP inspector, versus only 8 DIP below the capture header and 12 DIP between Phasors / Measurements.

Actual Grid geometry fixed in this follow-up:

• Outer shell horizontal gutters: 280,8,*,8,320, rather than 280,16,*,16,320.
• Analyzer interior canvas/inspector and phasor/measurement split: 8 DIP.
• Diagnostics hero/metric vertical and nine adjacent metric-card horizontal gaps: 8 DIP.
• GOOSE timeline/inspector: 8 DIP.
• Timing/PTP hero / evidence / events and three header cards: 8 DIP.
• SCL hero/body and catalog/inspector: 8 DIP.
• All primary panel sibling gaps now use compact 8 DIP, with independent 12-DIP inside-panel padding.
• Fixed explorer Grid.RowSpan=2 bug that caused the sidebar bottom to overlap the footer gap and fail to align with the main canvas bottom. It now occupies exactly Grid.Row=0, like the central canvas, above the shared 8-DIP footer gutter.
• The updated parsed-XAML CI contract checks root shell geometry, major tab grids, actual left panel row alignment, and legacy metric gaps. No data acquisition/decoder/phasor math changed.

Validation: Windows CI, runtime architecture/stability, CodeQL, dependency review, and Inno installer for current commit are the automated gates. Live Windows screenshots at 100%/125%/150% DPI remain a separate visual acceptance gate.