feat: dialog improvements

- "Unsaved changes" dialogs ask about saving the project
- Trying to close the window also triggers an "unsaved changes" dialog
when the editor is dirty.
- Nicer API for dialogs (similar to what I do in `foghorn-rs/foghorn`)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/error.rs b/src/error.rs
index 9e1ee9d..c8405f4 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,4 @@
+use std::borrow::Cow;
 use std::io;
 use std::sync::Arc;
 
@@ -57,3 +58,9 @@ impl From<Error> for String {
         value.to_string()
     }
 }
+
+impl From<Error> for Cow<'static, str> {
+    fn from(value: Error) -> Self {
+        value.to_string().into()
+    }
+}