chore: Refine the UI (#102)

* update deps

* update window options

* linux title bar

* fix build

* .

* fix build

* rounded corners on linux

* .

* .

* fix i18n key

* fix change subject modal

* .

* update new account

* .

* update relay modal

* .

* fix i18n keys

---------

Co-authored-by: reya <reya@macbook.local>

crates/theme/src/scrollbar_mode.rs

@@ -0,0 +1,21 @@
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
+pub enum ScrollBarMode {
+    #[default]
+    Scrolling,
+    Hover,
+    Always,
+}
+
+impl ScrollBarMode {
+    pub fn is_scrolling(&self) -> bool {
+        matches!(self, Self::Scrolling)
+    }
+
+    pub fn is_hover(&self) -> bool {
+        matches!(self, Self::Hover)
+    }
+
+    pub fn is_always(&self) -> bool {
+        matches!(self, Self::Always)
+    }
+}