feat: add manual save with Ctrl+S and suppress auto-save toasts

Changes:
- Modified handleSaveProject to accept showToast parameter (default: false)
- Auto-saves now run silently without toast notifications
- Added Ctrl+S / Cmd+S keyboard shortcut for manual save with toast
- Added "Save Project" and "Open Projects" to command palette
- Error toasts still shown for all save failures

This provides the best of both worlds:
- Automatic background saves don't interrupt the user
- Manual saves (Ctrl+S or command palette) provide confirmation
- Users can work without being constantly notified

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

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

components/editor/AudioEditor.tsx

@@ -887,7 +887,7 @@ export function AudioEditor() {
     currentTimeRef.current = currentTime;
   }, [currentTime]);
 
-  const handleSaveProject = React.useCallback(async () => {
+  const handleSaveProject = React.useCallback(async (showToast = false) => {
     if (tracks.length === 0) return;
 
     try {
@@ -920,14 +920,18 @@ export function AudioEditor() {
       // Save last project ID to localStorage for auto-load on next visit
       localStorage.setItem('audio-ui-last-project', projectId);
 
-      addToast({
-        title: 'Project Saved',
-        description: `"${currentProjectName}" saved successfully`,
-        variant: 'success',
-        duration: 2000,
-      });
+      // Only show toast for manual saves
+      if (showToast) {
+        addToast({
+          title: 'Project Saved',
+          description: `"${currentProjectName}" saved successfully`,
+          variant: 'success',
+          duration: 2000,
+        });
+      }
     } catch (error) {
       console.error('Failed to save project:', error);
+      // Always show error toasts
       addToast({
         title: 'Save Failed',
         description: 'Could not save project',
@@ -1173,6 +1177,22 @@ export function AudioEditor() {
         category: 'playback',
         action: stop,
       },
+      // Project
+      {
+        id: 'save-project',
+        label: 'Save Project',
+        description: 'Save current project',
+        shortcut: 'Ctrl+S',
+        category: 'file',
+        action: () => handleSaveProject(true),
+      },
+      {
+        id: 'open-projects',
+        label: 'Open Projects',
+        description: 'Open projects dialog',
+        category: 'file',
+        action: handleOpenProjectsDialog,
+      },
       // View
       {
         id: 'zoom-in',
@@ -1219,7 +1239,7 @@ export function AudioEditor() {
       },
     ];
     return actions;
-  }, [play, pause, stop, handleZoomIn, handleZoomOut, handleFitToView, handleImportTracks, handleClearTracks, addTrack]);
+  }, [play, pause, stop, handleSaveProject, handleOpenProjectsDialog, handleZoomIn, handleZoomOut, handleFitToView, handleImportTracks, handleClearTracks, addTrack]);
 
   // Keyboard shortcuts
   React.useEffect(() => {
@@ -1275,6 +1295,13 @@ export function AudioEditor() {
         return;
       }
 
+      // Ctrl/Cmd+S: Save project (manual save with toast)
+      if ((e.ctrlKey || e.metaKey) && e.key === 's') {
+        e.preventDefault();
+        handleSaveProject(true); // Show toast for manual saves
+        return;
+      }
+
       // Ctrl/Cmd+D: Duplicate
       if ((e.ctrlKey || e.metaKey) && e.key === 'd') {
         e.preventDefault();
@@ -1298,7 +1325,7 @@ export function AudioEditor() {
 
     window.addEventListener('keydown', handleKeyDown);
     return () => window.removeEventListener('keydown', handleKeyDown);
-  }, [togglePlayPause, canUndo, canRedo, undo, redo, handleCut, handleCopy, handlePaste, handleDelete, handleDuplicate]);
+  }, [togglePlayPause, canUndo, canRedo, undo, redo, handleCut, handleCopy, handlePaste, handleDelete, handleDuplicate, handleSaveProject]);
 
   return (
     <>