chore(tests): FAST=1 gate (62s) alongside the full 2m19s run

Measured the suite with a TRX logger instead of guessing: 575 tests, 2m19s wall, 165s of test
time. The 20-minute runs were NOT the suite — they were a malformed XAML trigger throwing on window
construction, crashing the test host and hanging the retry. That is fixed (17d8353).

The cost is concentrated: 113 of 155 classes finish under 1s (17s total), while a dozen classes
wait on real timers — ZoomBoxInteractionTests alone is 17s for one test. FAST=1 excludes those
twelve (527 tests, 49s of test time, 62s wall including the clean build) for runs while the machine
is in use; the full set stays the milestone gate.

scripts/verify.sh

@@ -54,8 +54,17 @@ TESTDLL="$ROOTWIN\\ytLive.Tests\\bin\\Debug\\net8.0-windows10.0.19041.0\\ytLive.
 "$DOTNET" build "$ROOTWIN\\ytLive.Tests\\ytLive.Tests.csproj" > /dev/null
 set +e
 TEST_ARGS=("$TESTDLL")
+FILTER="FullyQualifiedName!~RealMouseDrag"
+if [ "${FAST:-0}" = "1" ]; then
+    for slow in ZoomBoxInteractionTests TextLayerOutputTests NotificationAreaIntegrationTests \
+                WebcamStartupResourceTests SocialsPreviewTests TopBarModeTests \
+                TextLayerEditorPreviewTests TextLayerDropdownTests WebcamMenuGateTests \
+                SceneThumbnailTests AlertTickerPreviewDisplayTests FramePumpTests; do
+        FILTER="$FILTER&FullyQualifiedName!~$slow"
+    done
+fi
 if [ "${PHYSICAL_TESTS:-0}" != "1" ]; then
-    TEST_ARGS+=("--TestCaseFilter:FullyQualifiedName!~RealMouseDrag")
+    TEST_ARGS+=("--TestCaseFilter:$FILTER")
 fi
 RUN_RAW="$("$DOTNET" vstest "${TEST_ARGS[@]}" 2>&1)"
 TEST_EXIT=$?