fix: resolve TypeScript compilation errors in advanced effects

- Convert if/else chains to proper type narrowing patterns
- Use type assertions to avoid discriminated union issues
- Simplify EffectPreset and DEFAULT_PARAMS types using any
- Fix TypeScript strict mode compilation errors
- Reorder handler logic to avoid type narrowing conflicts

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

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

components/editor/AudioEditor.tsx

@@ -660,27 +660,31 @@ export function AudioEditor() {
       let modifiedBuffer: AudioBuffer;
       let effectName: string;
 
-      if (params.type === 'compressor') {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyCompressor(buf, params)
-        );
-        effectName = 'Compressor';
-      } else if (params.type === 'limiter') {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyLimiter(buf, params)
-        );
-        effectName = 'Limiter';
-      } else {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyGate(buf, params)
-        );
-        effectName = 'Gate';
+      switch (params.type) {
+        case 'compressor':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyCompressor(buf, params)
+          );
+          effectName = 'Compressor';
+          break;
+        case 'limiter':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyLimiter(buf, params)
+          );
+          effectName = 'Limiter';
+          break;
+        case 'gate':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyGate(buf, params)
+          );
+          effectName = 'Gate';
+          break;
       }
 
       const command = new EffectCommand(
@@ -719,41 +723,47 @@ export function AudioEditor() {
       let modifiedBuffer: AudioBuffer;
       let effectName: string;
 
-      if (params.type === 'delay') {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyDelay(buf, params)
-        );
-        effectName = 'Delay';
-      } else if (params.type === 'reverb') {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyReverb(buf, params)
-        );
-        effectName = 'Reverb';
-      } else if (params.type === 'chorus') {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyChorus(buf, params)
-        );
-        effectName = 'Chorus';
-      } else if (params.type === 'flanger') {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyFlanger(buf, params)
-        );
-        effectName = 'Flanger';
-      } else {
-        modifiedBuffer = await applyAsyncEffectToSelection(
-          audioBuffer,
-          selection,
-          (buf) => applyPhaser(buf, params)
-        );
-        effectName = 'Phaser';
+      switch (params.type) {
+        case 'delay':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyDelay(buf, params)
+          );
+          effectName = 'Delay';
+          break;
+        case 'reverb':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyReverb(buf, params)
+          );
+          effectName = 'Reverb';
+          break;
+        case 'chorus':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyChorus(buf, params)
+          );
+          effectName = 'Chorus';
+          break;
+        case 'flanger':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyFlanger(buf, params)
+          );
+          effectName = 'Flanger';
+          break;
+        case 'phaser':
+          modifiedBuffer = await applyAsyncEffectToSelection(
+            audioBuffer,
+            selection,
+            (buf) => applyPhaser(buf, params)
+          );
+          effectName = 'Phaser';
+          break;
       }
 
       const command = new EffectCommand(
@@ -791,34 +801,36 @@ export function AudioEditor() {
       let modifiedBuffer: AudioBuffer;
       let effectName: string;
 
-      if (params.type === 'pitch') {
+      const effectType = params.type;
+
+      if (effectType === 'pitch') {
         modifiedBuffer = await applyAsyncEffectToSelection(
           audioBuffer,
           selection,
-          (buf) => applyPitchShift(buf, params)
+          (buf) => applyPitchShift(buf, params as any)
         );
         effectName = 'Pitch Shift';
-      } else if (params.type === 'timestretch') {
+      } else if (effectType === 'timestretch') {
         modifiedBuffer = await applyAsyncEffectToSelection(
           audioBuffer,
           selection,
-          (buf) => applyTimeStretch(buf, params)
+          (buf) => applyTimeStretch(buf, params as any)
         );
         effectName = 'Time Stretch';
-      } else if (params.type === 'distortion') {
+      } else if (effectType === 'bitcrusher') {
         modifiedBuffer = await applyAsyncEffectToSelection(
           audioBuffer,
           selection,
-          (buf) => applyDistortion(buf, params)
+          (buf) => applyBitcrusher(buf, params as any)
         );
-        effectName = 'Distortion';
+        effectName = 'Bitcrusher';
       } else {
         modifiedBuffer = await applyAsyncEffectToSelection(
           audioBuffer,
           selection,
-          (buf) => applyBitcrusher(buf, params)
+          (buf) => applyDistortion(buf, params as any)
         );
-        effectName = 'Bitcrusher';
+        effectName = 'Distortion';
       }
 
       const command = new EffectCommand(