Add real pause, desktop notifications, undo, accessibility, CLI watch

pixstrip-core/src/executor.rs

@@ -32,17 +32,32 @@ pub struct BatchResult {
 
 pub struct PipelineExecutor {
     cancel_flag: Arc<AtomicBool>,
+    pause_flag: Arc<AtomicBool>,
 }
 
 impl PipelineExecutor {
     pub fn new() -> Self {
         Self {
             cancel_flag: Arc::new(AtomicBool::new(false)),
+            pause_flag: Arc::new(AtomicBool::new(false)),
         }
     }
 
     pub fn with_cancel(cancel_flag: Arc<AtomicBool>) -> Self {
-        Self { cancel_flag }
+        Self {
+            cancel_flag,
+            pause_flag: Arc::new(AtomicBool::new(false)),
+        }
+    }
+
+    pub fn with_cancel_and_pause(
+        cancel_flag: Arc<AtomicBool>,
+        pause_flag: Arc<AtomicBool>,
+    ) -> Self {
+        Self {
+            cancel_flag,
+            pause_flag,
+        }
     }
 
     pub fn execute<F>(&self, job: &ProcessingJob, mut on_progress: F) -> Result<BatchResult>
@@ -71,6 +86,18 @@ impl PipelineExecutor {
                 break;
             }
 
+            // Wait while paused (check every 100ms)
+            while self.pause_flag.load(Ordering::Relaxed) {
+                std::thread::sleep(std::time::Duration::from_millis(100));
+                if self.cancel_flag.load(Ordering::Relaxed) {
+                    result.cancelled = true;
+                    break;
+                }
+            }
+            if result.cancelled {
+                break;
+            }
+
             let file_name = source
                 .path
                 .file_name()