Fix various lints (#282)

* Use a plain array to store splash screen content

* Use ? operator instead of returning none

src/models/application/preferences/mod.rs

@@ -321,13 +321,10 @@ impl Preferences {
         let extension = path_extension(Some(path))?;
 
         // Build a command using the command sub-key.
-        let Some(program) = self
+        let program = self
             .data
             .as_ref()
-            .and_then(|data| data[TYPES_KEY][extension][FORMAT_TOOL_KEY]["command"].as_str())
-        else {
-            return None;
-        };
+            .and_then(|data| data[TYPES_KEY][extension][FORMAT_TOOL_KEY]["command"].as_str())?;
         let mut command = process::Command::new(program);
 
         // Parse and add options to command, if present.

src/presenters/modes/normal.rs

@@ -41,7 +41,7 @@ pub fn display(
 
         presenter.present()?;
     } else {
-        let content = vec![
+        let content = [
             format!("Amp v{}", env!("CARGO_PKG_VERSION")),
             String::from("© 2015-2024 Jordan MacDonald"),
             String::from(" "),