feat: apply enableSpectrogram and sampleRate settings to editor

Applied performance and audio settings to actual editor behavior:
- enableSpectrogram: conditionally show/hide spectrogram analyzer option
- sampleRate: sync recording sample rate with global audio settings

Changes:
- Switch analyzer view away from spectrogram when setting is disabled
- Adjust analyzer toggle grid columns based on spectrogram visibility
- Sync recording hook's sampleRate with global settings via useEffect

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

components/editor/AudioEditor.tsx

@@ -76,6 +76,13 @@ export function AudioEditor() {
   const [exportDialogOpen, setExportDialogOpen] = React.useState(false);
   const [isExporting, setIsExporting] = React.useState(false);
   const [analyzerView, setAnalyzerView] = React.useState<'frequency' | 'spectrogram' | 'phase' | 'lufs' | 'stats'>('frequency');
+
+  // Switch away from spectrogram if it gets disabled
+  React.useEffect(() => {
+    if (analyzerView === 'spectrogram' && !settings.performance.enableSpectrogram) {
+      setAnalyzerView('frequency');
+    }
+  }, [analyzerView, settings.performance.enableSpectrogram]);
   const [projectsDialogOpen, setProjectsDialogOpen] = React.useState(false);
   const [projects, setProjects] = React.useState<ProjectMetadata[]>([]);
   const [currentProjectId, setCurrentProjectId] = React.useState<string | null>(null);
@@ -100,6 +107,11 @@ export function AudioEditor() {
     setSampleRate,
   } = useRecording();
 
+  // Sync recording sample rate with global settings
+  React.useEffect(() => {
+    setSampleRate(settings.audio.sampleRate);
+  }, [settings.audio.sampleRate, setSampleRate]);
+
   // Multi-track hooks
   const {
     tracks,
@@ -1606,7 +1618,7 @@ export function AudioEditor() {
           </div>
 
           {/* Analyzer Toggle */}
-          <div className="grid grid-cols-5 gap-0.5 bg-muted/20 border border-border/50 rounded-md p-0.5 max-w-[192px] mx-auto">
+          <div className={`grid ${settings.performance.enableSpectrogram ? 'grid-cols-5' : 'grid-cols-4'} gap-0.5 bg-muted/20 border border-border/50 rounded-md p-0.5 max-w-[192px] mx-auto`}>
             <button
               onClick={() => setAnalyzerView('frequency')}
               className={`px-1 py-1 rounded text-[9px] font-bold uppercase tracking-wider transition-all ${
@@ -1618,17 +1630,19 @@ export function AudioEditor() {
             >
               FFT
             </button>
-            <button
-              onClick={() => setAnalyzerView('spectrogram')}
-              className={`px-1 py-1 rounded text-[9px] font-bold uppercase tracking-wider transition-all ${
-                analyzerView === 'spectrogram'
-                  ? 'bg-accent text-accent-foreground shadow-sm'
-                  : 'text-muted-foreground hover:text-foreground'
-              }`}
-              title="Spectrogram"
-            >
-              SPEC
-            </button>
+            {settings.performance.enableSpectrogram && (
+              <button
+                onClick={() => setAnalyzerView('spectrogram')}
+                className={`px-1 py-1 rounded text-[9px] font-bold uppercase tracking-wider transition-all ${
+                  analyzerView === 'spectrogram'
+                    ? 'bg-accent text-accent-foreground shadow-sm'
+                    : 'text-muted-foreground hover:text-foreground'
+                }`}
+                title="Spectrogram"
+              >
+                SPEC
+              </button>
+            )}
             <button
               onClick={() => setAnalyzerView('phase')}
               className={`px-1 py-1 rounded text-[9px] font-bold uppercase tracking-wider transition-all ${
@@ -1668,7 +1682,7 @@ export function AudioEditor() {
           <div className="flex-1 min-h-[360px] flex items-start justify-center">
             <div className="w-[178px]">
               {analyzerView === 'frequency' && <FrequencyAnalyzer analyserNode={masterAnalyser} />}
-              {analyzerView === 'spectrogram' && <Spectrogram analyserNode={masterAnalyser} />}
+              {analyzerView === 'spectrogram' && settings.performance.enableSpectrogram && <Spectrogram analyserNode={masterAnalyser} />}
               {analyzerView === 'phase' && <PhaseCorrelationMeter analyserNode={masterAnalyser} />}
               {analyzerView === 'lufs' && <LUFSMeter analyserNode={masterAnalyser} />}
               {analyzerView === 'stats' && <AudioStatistics tracks={tracks} />}