fix: bug-fix sweep across node, audio, render, plugin subsystems

Node core:
- MathNode/TrigonometryNode combo strings realigned with Operation enums
- mathbase scalar/vector operand pick no longer uses bitwise type checks
- NodeSetPositionAndDependenciesRecursively moves dependencies again
- RemoveAllKeyframes undo actually restores keyframes
- NodeGroup GetInputName null-deref guard, passthrough ids use input id
- NodeValueTable::Has is an exact type match; tag fallback only for
  empty tags; kStrCombo/kPushButton get data type names
- delete_all_keyframes no longer loops forever on unparented keyframes;
  keyframe-load failures propagate; rational interpolation falls back to
  double; OpacityEffect no longer leaks its internal MathNode

Audio/footage:
- AudioVisualWaveform: GetSummaryFromTime underflow OOB read, TrimIn
  prepend length bookkeeping, OverwriteSums source channel indexing
- PanNode inserts the pan value into the sample job (keyframed pan
  works); OutputParamsChanged is emitted on device change; PortAudio
  device indices are validated before Pa_GetDeviceInfo
- Footage: AdjustTimeByLoopMode no longer hangs/UBs on degenerate
  lengths, GetStreamIndex bounds-checked, CheckFootage clears stale
  state on missing files, failed probes are not cached,
  FootageDescription::Load requires its own root element

Render/track:
- ViewerOutput pushes the tagged samples value; TrackList disconnects
  the track-height lambda; GetTrackFromReference validity check
- RenderManager dummy backend: null-initialized threads, guarded
  decoder-cache/timer paths; Renderer::Destroy releases color cache
  shaders/textures; unknown dynamic backends no longer alias to oakgl
- SharedMemoryRegion POSIX attach validates segment size; ReadMessage
  skips blank lines instead of failing; GC counter clamped;
  IsRenderingCustomRange implemented; TimeOffsetNode gets a true
  inverse OutputTimeAdjustment; zero-speed clips return the held frame

Plugin/nodes:
- OliveClip: stored default region of definition is honored, on-demand
  images are cached; OliveHost sets host identity properties and logs
  instead of showing modal dialogs offscreen; Plugin.h dead decls gone
- DespillNode guards graph-less use with Rec.709 fallback; description
  typos fixed (despill, swirl); mosaic applies when only one axis
  matches; Windows-only Project filename separator test fixed

tests/gtest/node_audio_test.cpp

@@ -364,7 +364,7 @@ TEST(PanNode, NoSamplesInputProducesNoOutput)
 			  olive::NodeValue::kNone);
 }
 
-TEST(PanNode, KeyframedPanProducesSampleJobButLosesPanValue)
+TEST(PanNode, KeyframedPanProducesSampleJobWithPanValue)
 {
 	olive::ColorManager::SetUpDefaultConfig();
 	olive::Project project;
@@ -383,22 +383,22 @@ TEST(PanNode, KeyframedPanProducesSampleJobButLosesPanValue)
 	ASSERT_EQ(result.type(), olive::NodeValue::kSamples);
 	ASSERT_TRUE(result.canConvert<olive::SampleJob>());
 
-	// NOTE: Unlike VolumeNode, PanNode::Value() never inserts the panning
-	// value into the SampleJob, so the job's value map is empty and
-	// ProcessSamples() always sees a pan of 0 (a plain copy). The production
-	// RenderProcessor only re-evaluates inputs present in the job, so
-	// keyframed pan is silently ignored (suspected bug, documented here).
+	// Like VolumeNode, PanNode::Value() inserts the panning value into the
+	// SampleJob so ProcessSamples() sees the keyframed pan
 	const olive::SampleJob job = result.value<olive::SampleJob>();
-	EXPECT_FALSE(job.GetValues().contains(olive::PanNode::kPanningInput));
+	ASSERT_TRUE(job.GetValues().contains(olive::PanNode::kPanningInput));
+	EXPECT_DOUBLE_EQ(job.GetValues().value(olive::PanNode::kPanningInput).toDouble(),
+					 1.0);
 
 	SampleResolvingTraverser resolver;
 	resolver.Resolve(result);
 
+	// Pan 1.0 (full right) silences the left channel and leaves the right
 	const olive::core::SampleBuffer out = result.toSamples();
 	ASSERT_TRUE(out.is_allocated());
 	ASSERT_EQ(out.sample_count(), 4u);
 	for (int i = 0; i < 4; i++) {
-		EXPECT_FLOAT_EQ(out.data(0)[i], float(i + 1));
+		EXPECT_FLOAT_EQ(out.data(0)[i], 0.0f);
 		EXPECT_FLOAT_EQ(out.data(1)[i], float(i + 5));
 	}
 }