Check for missing directories

src/app.rs

@@ -113,7 +113,30 @@ impl App {
         }
     }
 
+    fn ensure_watson_directories() -> anyhow::Result<()> {
+        // Create watson config directory if it doesn't exist
+        let watson_dir = dirs::config_dir()
+            .ok_or_else(|| anyhow::anyhow!("Could not find config directory"))?
+            .join("watson");
+
+        if !watson_dir.exists() {
+            std::fs::create_dir_all(&watson_dir)?;
+        }
+
+        // Ensure frames file exists
+        let frames_path = watson_dir.join("frames");
+        if !frames_path.exists() {
+            // Create an empty frames file (empty JSON array)
+            std::fs::write(&frames_path, "[]")?;
+        }
+
+        Ok(())
+    }
+
     pub fn new() -> anyhow::Result<Self> {
+        // Ensure watson directories and files exist
+        Self::ensure_watson_directories()?;
+
         let config = Config::load()?;
         let mut state = AppState::load()?;