chore: refactor the global state and improve signer (#56)

* refactor

* update

* .

* rustfmt

* .

* .

* .

* .

* .

* add document

* .

* add logout

* handle error

* chore: update gpui

* adjust timeout

crates/common/src/debounced_delay.rs

@@ -1,6 +1,9 @@
-use futures::{channel::oneshot, FutureExt};
+use std::marker::PhantomData;
+use std::time::Duration;
+
+use futures::channel::oneshot;
+use futures::FutureExt;
 use gpui::{Context, Task};
-use std::{marker::PhantomData, time::Duration};
 
 pub struct DebouncedDelay<E: 'static> {
     task: Option<Task<()>>,

crates/common/src/lib.rs

@@ -1,8 +1,6 @@
-use std::{
-    collections::HashSet,
-    hash::{DefaultHasher, Hash, Hasher},
-    sync::Arc,
-};
+use std::collections::HashSet;
+use std::hash::{DefaultHasher, Hash, Hasher};
+use std::sync::Arc;
 
 use global::constants::NIP96_SERVER;
 use gpui::{Image, ImageFormat};
@@ -42,11 +40,12 @@ pub fn room_hash(event: &Event) -> u64 {
     hasher.finish()
 }
 
-pub fn string_to_qr(data: &str) -> Result<Arc<Image>, anyhow::Error> {
-    let bytes = qrcode_generator::to_png_to_vec_from_str(data, QrCodeEcc::Medium, 256)?;
-    let img = Arc::new(Image::from_bytes(ImageFormat::Png, bytes));
+pub fn string_to_qr(data: &str) -> Option<Arc<Image>> {
+    let Ok(bytes) = qrcode_generator::to_png_to_vec_from_str(data, QrCodeEcc::Medium, 256) else {
+        return None;
+    };
 
-    Ok(img)
+    Some(Arc::new(Image::from_bytes(ImageFormat::Png, bytes)))
 }
 
 pub fn compare<T>(a: &[T], b: &[T]) -> bool