HANDOFF — 2026-10-10 (scene-order F-key fix + desktop-lock fix; both LOCAL, uncommitted)

At a glance

Branch main (no feature branch). Pushed through 5685c5d; 18 commits local, not pushed (push at the creator's call).
Desktop-lock fix committed as 63bf844; scene-order fix below is uncommitted.

main (no feature branch). Pushed through 5685c5d (TRAX toggle); everything after is local, not pushed (push at the creator's call).

Fix for the scene-strip / F-key ordering report — ViewModels/MainViewModel.Scenes.cs new ReorderScenesToCanonical() (canonical F1-F5 order at load, renamed scenes after; next save re-stamps SortOrder) called from MainViewModel.cs:LoadLayout; ytLive.Tests/SceneOrderTests.cs (new, seeds a Chat-before-BRB DB and asserts order + F1-F5 labels + persisted SortOrder). See bugs.md entry 2026-10-10. Scope-locked files: ViewModels/MainViewModel.Scenes.cs, ViewModels/MainViewModel.cs (1 call line), ytLive.Tests/SceneOrderTests.cs, bugs.md, HANDOFF.md.
Full suite 423 passed / 0 failed / 0 warnings. Root cause was the creator's own DB (Chat SortOrder 2, BRB 3); the fix heals it on next launch regardless of DB history.
To commit later (this unit only): the files listed above. Then the working tree is back to just the creator's pinned-chat unit (NOT mine to commit).

ShowActivated = !FullscreenGameRunningNow + FullScreenDetectorOverride seam + DesktopLockTests (3 tests). Committed 2026-10-10. Creator still to verify in-game (launch while an exclusive-fullscreen game owns the foreground — the game must stay live).

NOT mine — do NOT commit: the creator's in-flight "pinned chat" unit (Models/YouTube.cs, ViewModels/MainViewModel.Chat.cs, untracked Helpers/RelayCommandGeneric.cs, and its hunks in Controls/LeftPanel.xaml), plus the creator's untracked Assets/llamacasty* art.
⚠️ Pre-commit (scene-order unit): scripts/verify.sh runs scripts/scope-check.sh against ALL working-tree changes — the not-mine pinned-chat + art files WILL flag. Pass them as declared-known.

Jitter fix (3057069) — MaskSmoother: per-session blend 0.75×new + 0.25×previous at the ONE worker (CameraManager.RunEffectWorker → session.Smoother.Smooth(TrySegment(source))). State on CameraSession, NOT the segmenter (shared app-wide, contract-pinned to raw output). Null resets history; first frame passes through; never aliases caller's array; ping-pong buffers (no per-frame LOH alloc). Weights: OBS obs-backgroundremoval 0.85 default, Jitsi 0.7/0.3 best (0.5/0.5 smears). Test Temporal_Smoothing_Damps_Segmentation_Jitter_Across_Frames: x=6 → first 255 / smoothed 58 / raw-unsmoothed 0. ⚠️ Gotcha: worker guards a re-queued identical frame reference — pump frame2 as a NEW instance.
Blur "heavy" fix (this commit) — quadratic radius: BlurRadius(strength) = 1 + 5·s², MaxBlurRadius 12→6 small px (≈ 24 full px max). Default 0.5 = 2 small px (was 6 under the old linear curve) — ~3× lighter spread. Rationale: StreamFX defaults Box blur Size to 5, author stops downscaled blurs ~8px. Test Blur_default_strength_is_gentle_and_full_strength_is_strong pins the mapping and step-edge behaviour (reach 9px default vs 26px max). Point-source probes vanish below the 0.5 rounding (3 box passes dilute a spike) — use a step edge, not a spike, to measure blur.

Creator launches the app: the scene strip must show Starting/Live/BRB/Chat/Ending in order with F1-F5 correct (the creator's DB had Chat before BRB; the load-time reorder heals it and the next save re-stamps SortOrder). Also still to verify when convenient: the desktop-lock fix while an exclusive-fullscreen game owns the foreground. Then I can commit the scene-order unit.

Full suite 423 passed / 0 failed / 0 skipped / 0 warnings (2026-10-10; includes the new SceneOrderTests). Known env flakes remain Mix_HonorsProviderGains… (fails while system audio plays) and RealMouseDrag… (needs an idle desktop).

Vertical-format regression (STALE, not fixed): 1080p60 vertical selection no longer shrinks the capture border in the preview. Mechanism mapped (see prior summary): the crop Rectangle Controls/PreviewPane.xaml:319-322 bound to OutputRectX/Y/W/H + IsOutputCropped, driven by MainViewModel.Streaming.cs ApplyStreamQuality from SelectedQuality (binding + ctor only, new("Vertical 1080p60", 60, 8.0, 1080, 1920)), DimRects in MainViewModel.cs:91-94. Root cause unknown — paused.
Vertical recording file closed: the recording itself is 1080×1920 60fps correctly; the "whitespace" was the app's preview UI, not the file. Audio loudness (ebur128) for the private video was never run and the thread is closed unless the user reopens it.
Blur-heaviness = fixed (above). Yellow-border regression = stale thread.
⛔ Sudo password rotation pending (user; then update both password lines in CREDENTIALS.md).
TASK 56 secret scan before gramps/LlamaCasty goes public. TASK 55 disk hygiene queued.